JPH02230195A - Musical tone signal generating device - Google Patents

Abstract

PURPOSE:To easily generate various interpolative composite waveform data according to a small number of fundamental waveform data by reading the fundamental waveform data in accordance with musical tone control parameter information and performing interpolation and composition with weight coefficients. CONSTITUTION:Plural fundamental waveform data are read out of a waveform data storage means 3 with plural musical tone control parameters and then the fundamental waveform data fijk having various waveforms for the parameters (pitch, level, and range) can be prepared as waveform data to be processed by interpolative composition. The data fijk are interpolated in an interpolative composite musical tone waveform signal S5 by using parameter information (weight coefficients (alphaw, betau, and gammau corresponding to PITCH, LEVEL, and SELWB)) to obtain various interpolative composite musical tone waveform signals S5.

Description

[Detailed description of the invention]

[Industrial Field of Application] This invention relates to a musical tone signal generator, and particularly to a musical tone signal generator.
An electronic musical instrument that generates musical tone signals based on data.
It is suitable for application. [Summary of the Invention] This invention generates musical tone signals based on stored waveform data.
In a musical tone signal generator that generates multiple basic waveform data,
are read out and synthesized using the corresponding weighting coefficients.
By doing so, an interpolated synthesized musical waveform signal is formed.
This makes it easier to generate musical tones with greater expressive power.
can do. [Prior art] Two stored waveforms having different waveforms from the waveform memory
Read the data and check if it is different from the two stored waveform data.
A music message that synthesizes waveform data having a waveform that
As a noise generator, it was disclosed in Japanese Utility Model Application No. 55-60191
What is shown is suggested. This conventional musical tone signal generator reads data from two waveform memories.
Add note scaling parameters to the extracted waveform data
Two signals whose amplitude changes according to the pitch by multiplying them
Create intermediate waveform data and add it together in an adder.
The waveform data read from the waveform memory by
It is designed to synthesize waveform data that is different from the data waveform.
, this simply reduces the amount of data stored in the two waveform memories.
If the waveform data is different from the stored waveform,
A device that can generate waveform data has been proposed.
There is. [Problem to be solved by the invention] However, with this configuration, the interpolation between two stored waveforms is
Since only interpolation can be performed, it is possible to obtain by interpolation calculation.
It is possible to avoid monotonous sound waveforms.
When trying to generate musical sounds with great expressiveness in performance
It is still insufficient as a musical tone signal generating device. This invention was made in consideration of the above points, and
Create even more diverse musical waveforms from basic waveform data
By doing this, you can have sufficient expressiveness and great ease in your performance.
Propose a musical tone signal generator that can generate sound.
It is intended to be ? Means for Solving the Problem] In order to solve the problem, in the first invention,
Multiple musical tone control parameters (pitch, level, range)
Each of the corresponding plural basic waveform data f ijk is
is written in a memory area with a fixed address (i, j+, k).
waveform data storage means 31 and musical tone signal generation means (
4, 5, 21, 22, 11, 12) musical tone specification information (K
C% INTL, AFTR, TC)
parameter information (P I C H, L E V L,
S E Lwm) generation of musical tone control parameter information.
Generating means (15, 16, 5) and musical tone control parameter information
Multiple bases based on (PICH, LEVL, SEL■)
Main waveform data f! The relevant musical tone control parameter information of o
(P I C H, L E V L, S E Lw
Addition of basic waveform data f ijk corresponding to m)
Form response information? the musical note finger from the waveform data storage means 31.
specified by the determining means (4, 5, 21, 22, 11, 12).
A plurality of basic waveform data f lJ corresponding to a specified musical tone
Address type to read k as musical waveform signal WDATA
Seisen Dan 32 and musical tone control parameter information CP ICT {
Musical waveform signal WDA based on SLEVLSSEL
For multiple basic waveform data f ijk that constitute TA
A weighting coefficient generator that generates a weighting coefficient (β., TV, α0)
generating means (34, 32) and the musical waveform signal WDATA.
For each of the plurality of basic waveform data fiJk consisting of
Synthesize by multiplying the corresponding weighting coefficients (βu, TV, α8)
The interpolated synthesized tone waveform signal S5 is formed by
Interpolation synthesis means 33 converts the interpolated synthesized musical waveform signal into a musical tone signal S.
Musical tone signal conversion means (25, 26, 27) for converting into OND
). In addition, in the second invention, in addition to the first invention, weight
The coefficients (βe, γ,, α.) are each musical tone control parameter information.
About (P I CH, LEVLSSELwm) it
Their complements ((1-βU), (1-?V), (l-α.)
) and non-complement (β., TV, αI.l), and the complement
numbers ((1-β.), (1 rv), (1-α.)) and
and non-complementary numbers (βe, TV, α0) as the first and second fundamental waves.
Shape data ((film and f (1+lljk ), (
f! t* and fi (j.1■), (fzzm and f
The first
and an interpolated sum of waveform data between the second basic waveform data.
This is done to form a perfect sound waveform signal S5. [Operation] A plurality of fundamental waves stored in the waveform data storage means 31
shape data to multiple musical tone control parameters (pitch, level).
By reading out the multiple musical notes by
Multiple settings for sound control parameters (pitch, level, range)
Interpolation synthesis of basic waveform data f ink having various waveforms
It can be prepared as waveform data for calculation. The basic waveform data f ijk thus prepared is again
Musical tone control parameter information (PICH, LEV?..SE
Using the weighting coefficients (β5, TV, α-) corresponding to
is interpolated and synthesized into an interpolated synthesized musical waveform signal S5, thus
Furthermore, it is possible to obtain even more diverse interpolated synthesized musical waveform signals S5.
I can do that. Thus, the selection and
Each tone control parameter (pitch) is set during interpolation synthesis calculation.
The sound waveforms are diversified based on pitch, level, and range).
By performing such processing, interpolation synthesis
It is possible to reliably realize diversification of the musical waveform signal S5. [Example] An example of the present invention will be described in detail below with reference to the drawings. [1] Configuration of the first embodiment In FIG. 1, 1 indicates a single-note electronic musical instrument as a whole;
A large number of basic segment waveform data (i.e. one cycle worth of data)
It has a waveform memory 2 for storing waveform data) fijb,
Basic segment waveform data f of the waveform memory 2
Select one of k and address? Obtained in counter section 3
Repeated reading using the waveform read signal READ
From waveform memory 2 as musical waveform signal WDATA.
It is designed so that it can be sent out. As shown in FIG. 2, the waveform memory 2 stores a plurality of waveforms, for example, M
Bank group BANK. (m=1, 2...M)
Then, each bank group BANK. (m=1, 2...M
) are each a plurality of K waveform banks WB, (k=1, 2
......K). Note that in this example
, each bank group BANK. (m=1, 2...M)
The number of waveform banks K can be selected as desired.
has been done. Each waveform bank WB. (k=1, 2...K)
The bank selected by the bank group selection signal SELma■
Ku group BANK. For each tone assigned to
Basic segments representing musical tones corresponding to the range including chord pitches
ment waveform data f iJk also has a predetermined coordinate address.
They are stored sequentially in two memory areas. Here, each bank group BANK. (m-1, 2...
・Waveform bank WBk (k=1, 2...
... Basic segment waveform data stored in K)
The coordinate address of the f-th is the m-11th in Figure 2.
As shown in detail about the bank group B A N K + of
is a three-dimensional coordinate having an l coordinate axis, a j coordinate axis, and a k coordinate axis.
The k coordinate can be specified by the target address system, and the k coordinate
Coordinate address k = 1, 2...K (this
(This is called the pitch address), the first,
2nd...Kth waveform bank WB. , W.B.
・・・・・・W B t can be selected and the i coordinate axis can be selected.
The coordinate address i=1, 2...I (this
by specifying the pitch address).
waveform bank wB, (k=1, 2...K)
1. Second... Coordinate address of the memory area in the I column
coordinate address can be specified, and the coordinate address can be specified by the j coordinate axis.
J = 1, 2...J (this is called the level address)
By specifying the i-th column memory area (
i=1, 2...■) 1st, 2nd...
You can specify the coordinate address of the memory area on the Jth line.
It is being done. In this example, the memory area of each waveform bank (
Memory area included in each waveform bank belonging to each bank group
The number of hours and J in a) can be selected as arbitrary values as necessary.
It is. In this embodiment, the player presses and operates the keys on the keyboard section 4.
When this happens, the key press detection circuit 5 detects the key being pressed.
The key code signal KC representing the key code of
Generates a key-on signal KON indicating that it is being operated
and gives the key code signal KC to the frequency information conversion circuit 6.
By doing so, the frequency corresponding to the pitch of the key code signal KC is
Address counter uses F number data FN as wave number information
3. Address counter section 3 converts F number data FN into a predetermined clock.
Performs cumulative addition at each lock timing and adjusts the result of the addition.
For example, as shown in FIG.
For example, the 0th to 1023rd sampling data S
Basic segment waveform D RII for one waveform consisting of AMP
Basic segment waveform data with F Press key LJk
Does it correspond to the pitch of the key? can be read out at a speed that
It is done like this. The basic cell to be read by the waveform read signal READ
segment waveform data fij selection, basic segment
Based on four pieces of performance information that cause changes in the waveform D*tW.
The selected waveform is selected based on the specified waveform selection conditions. The first performance condition is tone, which the performer sets on the control panel.
Operate the tone selection operator 11 (Fig. 1) provided.
The timbre selection signal generated from the timbre selection signal generation circuit 12
A selection signal TC is given to the bank group selection circuit 13, and this
The bank group selection circuit 13 selects banks for the waveform memory 2.
A group selection signal SELIAHK is supplied. The second performance condition is the pitch, and the key code signal KC is a wave.
By being given as a type bank selection signal SEL■
Waveform bank WB. One of (k=1, 2...K)
is selected and specified, which causes the pitch of the pressed key to be
A waveform containing waveform data corresponding to a range including
Bank WBk can be selected and specified. Here, waveform bank WB. The number K is the number of fingers on the keyboard section 4.
Less than the number of key codes that can be specified (for example, 128)
number, and is actually specified by the performance operation.
Basic segment waveform DIEF corresponding to the key code
The waveform data with WB. (k-1, 2...
... Basic segment waveform data read from K)
Generated by interpolation calculation based on data f iJ1+
It is designed to do this. Each basic segment waveform data f iJk is the third selection
The pitch fluctuation waveform generation circuit section 15 (Fig. 1) is used as a designated signal.
) and the pitch designation signal PICH sent from
The selection condition signal is sent to the envelope waveform generation circuit section 16.
The level indicator consists of the envelope signal ENV generated by
specified by the constant signal LEVL. The pitch fluctuation waveform generation circuit section 15 corresponds to the keys of the keyboard section 4.
The initial touch detection circuit 21 and
The initials obtained from the lid touch detection circuit 22
aftertouch signal INTL and aftertouch signal AFTR.
Key code signal KC, key-on signal KON and tone selection
The key is turned on in the keyboard section 4 in response to the signal TC.
While the key is being operated, the key of the key being operated is turned on.
- Initialize based on the chord and specified tone.
Determined by touch operation amount or aftertouch operation amount
For example, a 7-bit pitch designation signal that represents a pitch fluctuation waveform.
Generates PICH. In addition, the envelope waveform generation circuit section 16
key signal INTL and aftertouch signal AFTR.
key-on signal KC, key-on signal KON and tone selection signal T
It is given with C, and the key-off starts from the moment the key-on operation is performed.
The key code of the key being played is displayed until the key is pressed.
Initial touch based on the selected tone
Level fluctuation amount according to operation amount or aftertouch operation amount
The envelope signal ENV consisting of the envelope waveform representing
, generated as the level designation signal LEVL. waveform memory
The musical waveform signal WDATA sent from the multiplication circuit structure
The envelope signal is sent to the envelope applying circuit 25 of the
After being multiplied by the number ENV, the digital/analog conversion circuit is
The musical tone signal SO is converted into an analog signal at path 26.
The signal is supplied to the sound system 27 as an ND. [2]
Data management in waveform memory 2 Data stored in waveform memory 2
The basic segment waveform data f ijk shown in Figure 2
As shown in , the coordinate address of the three-dimensional coordinate address system (
i,'Lk), one bank group BANK. (Follow
All basic segment waveform data representing one tone
Data f! Jk) as a series of
It is managed as a data group with coordinate addresses. In this way, the pitch of the musical tone to be produced varies depending on the performer.
, the amount corresponding to the amount of pitch variation is read out.
Coordinate address of basic segment waveform data fijk to be
change the envelope of the musical note that the performer should pronounce.
Is this correct when changing the server? The amount corresponding to the amount of level fluctuation
Coordinates of basic segment waveform data fLJ to be read
Change the address j, and then use the key for the performer to operate the performance.
The corresponding change in the key code when changing the
Basic segment waveform data fi to be read corresponding to
Change the coordinate address k of jk. In this embodiment, the first, second, mth, etc.
...Mth bank group B A N K l. ．． B
A N K z・・・・・・BANK.・・・・・・B
K.A.N.K., respectively included in A.N.K. waveform bank W
B,~WBK. In that order, as shown in Figure 4,
Predetermined coordinate addresses are assigned continuously, and each waveform bar
Specify the coordinate address of link WBk (k=1 to K.).
By doing so, the waveform bank data section (D
Basic segment waveform data f stored in [ATA]
! Jk can be specified. That is, the first bank group BANK. waveform bank WB.
・・・・・・WBk・・・・・・Start of WB t +
Coordinate address ADR■.・・・・・・A
DRwm.・・・・・・A D Rwv＋＋＋＋ is attached.
So, the second bank again? BANK. waveform bank of
W.B.・・・・・・WBk・・・・・・For WBo
Coordinate address A D R W■2・・・・・・ADRw
mi+z...ADR■K! 8 is attached,...
..., and the Mth bank group BANK. corrugated bang
KU WB,...WBk...WB tw
Coordinate address A D R ws l M, ADRwm
z. 4...A D R wm. is attached
. Each waveform bank in the waveform bank data section (DATA)
Address AD Rlmml+a (k = 1 ~Km
, m = 1 to M) are shown in Fig. 5.
As shown in the figure, the pitch number is used as the waveform data DATA.
Conversion coefficient data PCE, level pick-up conversion coefficient data L
C. Pitch address offset data PAOk. but,
All basic segment waveform data belonging to the waveform bank
Data f! Management data commonly used for Jk and
are stored and belong to the corresponding waveform bank.
Samples that make up the basic segment waveform data f ink
Ring waveform data f (in)s (1-1~I
*w=, J=1~JKm, k1~K. ) is stored
It has been done. Here, the waveform bank address ADRwm*- is the m-th
Eye bank group BANK. Of the waveform banks included in
Stores the waveform data DATA of the k-th waveform bank WBk.
It represents the coordinate address of the memory area where the second
In the figure, the first bank group BANK. the first of
Waveform bank WB. The basic segment
pitch the start address of the element waveform data f ijk.
Address i (i-1~■.) and level address j (=
1 to JII). ? 3] Reading of waveform data The waveform bank data section described above with respect to FIGS. 4 and 5
(DATA) required to read the waveform data DATA.
Required waveform bank address ADR ■. each has a tone
The selection condition data file shown in Figure 6 prepared for each
Management data section (FILE) and waveform bank address in Figure 7
In the response conversion table data section (TABLE), the following
It is formed according to the following procedure. The key code signal K? obtained from the key press detection circuit 5? becomes
The waveform bank selection signal SEL■ (Fig. 1) is a key code.
As a key code directory to specify one of the pick-up
Selection condition data file management data section (FILE)
is given to. In this embodiment, the key code number W
is W = "1", "2"...rl28",
The relevant key code pick-up w=K”, “2”...r
The weighting coefficient αw (w
= 1, 2...128) and the waveform of the lower 7 bits
Bank number WBm (k=1, 2...K.)
Data indicating either WBSEL, (w=1, 2,...
..., 128) 16-bit file data
is stored. Here, the weighting coefficient α. is the key code
Number W - "1", "2"...to rl28J
For each specific numerical value αw (w-1, 2...
...128) are assigned to each
Therefore, the waveform bank pick-up is included in one bank group.
waveform bank WBk (k=1, 2...K)
If any of these numbers is data WB S E L
Thus, the pitch address k and
Adjacent waveform banks WB.k+1 are marked.
Supports multiple key code pick-up between and WB k*1
Interpolation basic segment waveform data requires weighting factor α
Interpolation calculations can be performed by selecting a predetermined value according to
It is designed so that That is, as shown in FIG. 8, for example, three key codes
Key codes KC, , KC for numbers w, w+1, w+2
、． ．． , K.C. ! Waveform bank pick-up WB, and W
Bk+. When specifying as a key code representing the pitch between
, key code KC. , K.C. ．． , K.C. ．． against
As file data, (weighting coefficient α. and waveform
(weighting coefficient α.l and waveform bank WB
．． ), (weighting coefficient αwet and waveform bank WB) are divided.
guess. Thus, the key code KC. 4. KC, Ya. , K.C.w-t.
Interpolated basic segment waveform data F. (
ωt), Fw. l(ωmu),
Waveform bank number as F−−z (ω t)
Pa WB. and read from the waveform bank of W B k- +
Basic segment waveform data f ljli and fi
j (using k+11, weighting coefficient α., α,, α8, t
Then, the following formula F, (ω1)=αwf▲jk? (1-α-) f ij ■. 1) ・・・・・・
(1) F, -11 (ωB=αw+I f ijk+
(1-α,.+)r▲j0ya,) ・・・・・・(2)
F. t (ωt)-αw+t f ijk+(1-
αw*! ) f LJ (II+Il...
・By performing interpolation calculation as in (3), the waveform band
Basic segment waveform data f of WBk and WBk+1
tjl1 and fij. , 1, each have a sound
Interpolated basic segment waveform data F with color intermediate tone
w(ωt), F, l. ．． (ωt), Fw+z
(ωt) can be formed by interpolation calculation.
Ru. Interpolated elementary segments that can be formed by such interpolation operations
Waveform data Fyu (ωt), F. ◆I (ωt), F
, , -z(ωt) is the interpolation basic segment in Fig. 9.
waveform data F. As shown for (ωt),
Waveform bank corresponding to the pitches that sandwich the key code KCw
W.B. and basic segment waveform data of W B k- r.
f ljk and fij(k・1》) in the k coordinate axis direction
The deviation ftJ~fiJ(k.,,) is expressed as the weighting coefficient α1 and
The value is internally divided by its complement (1-αw) (Oth
For each of the th to 1023rd sampling data
about). Therefore, the interpolated basic segment waveform data Fw (ωt)
The waveform (and thus the tone) is the basic segment waveform data f
ijk and f! J(k.1, has a waveform (therefore,
timbre) with the similarity determined by the weighting coefficient α8, and the weighting coefficient
Number α. If the coefficient approaches “1”, the interpolated basic segment waveform
The waveform (and thus the tone) of the data Fyu (ωt) is
The waveform (and thus the tone) of the segment waveform data f is approached.
On the other hand, if α8 approaches the coefficient “0”, the fundamental segment wave
Shape data f Approaches the waveform (and thus the tone) of IJk, etc.
It turns out. Here, (ωmu) is displayed for one cycle as shown in Figure 3.
The sampling data SAMP is waveformed over time.
The position generated by reading with the read signal READ
Represents the phase signal component. In addition, the pitch variation waveform generation circuit section 15
The pitch designation signal PICH given from (Fig. 1) is
Constant pitch number u (u=rl", r 2 J-...-
rl28 J) and a pitch directory that specifies one of the
and select condition data file management data section (FILE)
is given to the tentative weighting coefficient β1x and the pitch
One value of number PN (=L 2...I.)
Data indicating PNSEL. (u=1, 2 -...-
128) It is now possible to specify file data consisting of
It is. Thus, as shown in Fig. 10, in order in the i coordinate axis direction,
Basic segment waveform data arranged as follows f! jlI
For example, there are three pitch addresses between i=i and i=i+1.
The fluctuation of PICH. , PICHu. , , P I
C.H. ．． ．． When there is a change bit P I C
H. , P I cH,. , , P I CHII.
As the file data of t (weighting coefficient β1 and pitch
PNi), (weighting coefficient β1.1 and pitch number P
N), (weighting coefficient β..8 and pitch pick-up PN1)
is stored and written to pitch address i and 1+1.
Basic segment waveform data that has been written in &
Three interpolated basic segment waveforms between
Data F. (ωL), F. . , (ωt), F. ．． !
(ωt) is expressed by the following formula F. (ωt) 1β, f5j+(1−βa) f (1411jk ・・・・・・
(4)F. ．． ．． (ω1)=βa. lf ink+(
1-βu+l) f (ill) jk・・・・・・
(5)F. 8 (ω 1) = βu*t f
ink+(1-βas!) f ll+Il jk...
...(6) can be obtained by interpolation calculation.
It is made possible. Interpolated elementary segments that can be formed by such interpolation operations
Waveform data Fu (ωt), F,. l (ωt),
Fu. z (ωt) is the waveform data F in FIG.
, (ωt), the given designation
Pitch addresses corresponding to pitches that sandwich pitch number U
Basic segment waveform data f of i and i+1 IJ1+
and f (deviation f in the i coordinate axis direction between i.ll jk
! jk” f (1+I)jk by the weighting coefficient β1 and its
becomes the value internally divided by the complement (1-β.) (the 0th
For each of the 1st to 1023rd sampling data
). Therefore, the supplementary basic segment waveform data F. (ωL) wave
The shape (and thus the tone) is based on the basic segment waveform data fiJ
I1 and f(!.l) The waveform that jll has (therefore
timbre) with the similarity determined by the weighting coefficient β5, and the weight
Coefficient β. If the coefficient approaches “1”, the interpolated fundamental segment wave
Shape data F. The waveform (and thus the tone) of (ωt) is basically
Waveform of segment waveform data f ink (therefore timbre)
, and conversely β. If the coefficient approaches "0", the basic segment waveform data f
(i*I) The waveform (and thus the tone) of Jk will be approached.
Ru. Furthermore, the waveform memory 2 includes an envelope waveform generation circuit section 16.
The envelope signal ENV (Figure 1) is used as a level designation signal.
Receive it as LEVL and use it as specified level pick-up y (y
s=r l'', ``2'' ... ``128'')
Select condition data file as envelope directory
File management data section (FILE).
weighting coefficient rvx and level pick-up LN, (-L 2
...J. ) Data LNSELv indicating one value of
The file consisting of (v-1, 2, ..., 128)
By specifying the level data, the level number u=rl
", "2"...rl28. interpolation base corresponding to
This segment waveform data Fv (ωt) is calculated by interpolation.
I ask. For example, as shown in Figure 11,
The level address of the basic segment waveform data
Basic segment waveform data with j=j and j=j+1
For example, place three fingers between f iJ++ and fzz or Ilk.
Constant fluctuation level LEVLv. ．． LEVL,. ．． ,LEV
L. ．． When 1 is specified, the interpolated basic segment waveform data
taFv(ωt), Fv. 1(ωj), Fv. z(ωt)
The following formula Fv(ωt) ” T wfi jw+ (1 r v)
f i (j*l) k...(7)? ■, (ωt) = Tv++fiJm+(1 rv*t)fi(
j+nm... (8) F,. t(ωt)=Tv. tfijk+CI Tw*z>fxi++>
*・・・・・・ (9)? The basic segment waveform data f1J and fi
(obtained as the intermediate value of j+1■.
Interpolated basic segment waveform data Fv (
ωt), Fv+1(ωt), Fv−z(ωt) are
In Fig. 9, the waveform data Fv(ωt) was described above.
In the same manner as above, the specified fluctuation level LEVLv is set to
Base of level address j and j+1 corresponding to the sandwiching level
This segment waveform data f! jk and fl(J++)m
The deviation in the j coordinate axis direction between f! Jw- f t (j
*l) k is defined by the weighting coefficient γ and (1-TV).
(0th to 1023rd samples)
(for each data set). Therefore, the wave of interpolated basic segment waveform data Fv(ωt)
The shape (and thus the tone) is based on the basic segment waveform data f.
and f * (the waveform that Jul1 m has (therefore
timbre) has a similarity determined by the weighting coefficient γ, where γ is the coefficient
If it approaches "1", the interpolated basic segment waveform data Fv(
The waveform (and thus the tone) of ωt) is based on the basic segment waveform data.
T f ijk waveform (and therefore tone), and conversely T,
If the coefficient approaches "0", the basic segment waveform data f
i (J+I1 Approaching the waveform (and therefore the tone) of k
become. Next, select condition data file management data section [FILE]
(Figure 6) in the keycode directory? is an interpolation calculation
The waveform bank WB1 to be used is specified and the corresponding waveform bank WB1 is specified.
Waveform bank WB. File data representing WB S E
When L, is read out, this is the waveform bank address conversion
In the table data section [TABLE] (Figure 7),
It is converted to the form bank address ADR. Here, the waveform bank address conversion table data section (TA
BLE) is selected by bank group selection signal SELsa■
M banks BANK. For each (m=1 to M),
Waveform bank select data WBSEL (W=1 to K
) is specified, the corresponding 26-bit waveform
Bank address data AD Rwm*m (k − 1
~K, m= 1 ~M). In this embodiment, waveform bank address data ADR■.
The memory that stores is a 26-bit memory for each address.
waveform bank address is used.
Data ADRw. k. The upper 16 bits of the first half of the memo
In addition to storing in the area, data for the lower 10 bits
The second half of the memory that follows? A is made to remember
There is. In this way, bank group selection signal SEL. by A■
Bank group BANK. of the m-th tone. The tone corresponding to
In the specified state, the keycode directory
The key to read out the kth waveform bank pick-up is
When the code signal KC is generated, waveform bank address conversion is performed.
The table data part (TABLE) is the waveform bank address
Send data ADRWlk* (k=k, m=m)
It turns out. This waveform bank address data ADR■. is the waveform bank
Address data is stored in the data section (DATA) (Figure 4).
is given, thereby pitch pick-up conversion coefficient data P
C. Level pick-up conversion coefficient data LCII. ,pitch
Address offset data PAO, sampling waveform
Read data f (Ilkllll~f (IJk)s
Set it to a state where it can be done. At this time, the sampling waveform data that can be read is
Data f (1 + k) @ ~ f (IJk) a is the waveform
Pitch and level address (1,j
)(?=1~I■, j-1~J*a)
One of them is read out. By the way, the address (1, j) of the pitch and level
and complementarity coefficients (β, T) are specified in the selection condition data file.
Pitch direct in file management data section (FILE)
the directory specified by the directory and envelope directory.
Pick-up selection data PNSEL. and level nan
Path selection data LNSELv and temporary complementarity coefficient βll
, TX (Figure 6), the following formula [i, β] 1 [ 0, P C eco X [PNSEL.
, βX ]・・・・・・(10) [j, β] = [0, L Cha ] × [ L
v − γ , β, Ko and [L
NSELv, γ. ] to the waveform bank data section (DA
Pitch pick-up stored as common data in TA)
Conversion coefficient data PC. ．． and level pick-up conversion coefficient data
TaLC. ．． It is found by multiplying . Note (10)
In equations and equations (11), [a, b] represents a with the integer part b
It is an associative deductor such that has a fractional part. Here, pitch pick-up conversion coefficient data pck. and level
The pick-up conversion coefficient data LC is for each waveform bank pick-up WB.
, (k-1 to K), which indicates the effective memory area of PC
A0-LLC. , = O~1. Cause
Pitch pick-up conversion coefficient data PC. ．． as PCA
Waveform bank pick-up W in which coefficient data of 1 is stored
B i = all pitch addresses in the NJEil axis direction.
S i-1 to I. Basic segment waveform data f +jm
(i- 1 to I g-) is written.
Therefore, at this time, the pitch directory (Figure 6)
Pitch number PN by! is specified, the corresponding
8 pitch address equal to pitch pick-up (i.e. i
-P Ni) basic segment waveform data f! jm(
i=1~I. ) is read out as the currently specified waveform.
It will be done. On the other hand, for example, pitch pick-up conversion data PCo
is P Ck. -0.5, the corresponding waveform bank WB
．． The maximum address among the pitch addresses in the i-coordinate axis direction of
Basic segment only up to half of ■, that is, I/2
Waveform data fBi+ (1-1 to I./2) is stored.
It means that there is no one. At this time, the pitch directory
The pitch pick-up selection data PNSEL. as well as
When the temporary complementation coefficient β8 is specified, the basic segment waveform data f at the pitch address of Z (where INT(a) is an operator that extracts the integer part of a)
is read out as the currently specified waveform data.
It turns out. Level pick-up conversion coefficient data LC. ．． Also, pitch pick-up
In the same manner as described above for the conversion coefficient data PCE, each
Waveform bank WB. Basic segment waveform data f
A function representing the effective memory area where iJ is actually stored.
Numerical values are used. By doing this, the sound
Basic segment waveform data f IJ by color or range
k (therefore, the basic segment waveform data f ijk
Even if there is a difference in the size of the stored memory area,
All values of pitch pick-up PN and level pick-up LNj
waveform bank WBk. also have the same effective memory area.
waveform memory 2.
This makes it much easier to specify the pitch and level for
Ru. In this embodiment, the bank group BANK of the waveform memory 2 is
BANKM and the waveform bank W that constitutes each bank group.
B. -WB. and the addresses that make up each waveform bank.
(l-1, j-1~J), (i■2, j-1~J)...
...(1-IS j-1~J) and each address
1st to 1023rd samples stored in
The absolute address [A D (f
<Aje)-)], the following formula [[AD(f(.b).
)] =ADRw+ets+(PAO*sX i))+(10
24X j)+AD(ω1)]... (13) ? , the address part of each simply increasing number is divided.
It's correct. The first address part AD (ωt) is the basic segment waveform D
■Each sampling data SAMP of F (Fig. 3)
= f iJm), which is the absolute address assigned to all adjacent
coordinate address of the memory area (i.e. pitch address)
) is the 1st to 1023rd sampling data
Absolute address r corresponding to SAMP 1024 J each
Step forward. The second address part A D (1024X j ) is at the j position.
It represents the address path amount in the direction of the mark axis, and each waveform bank
? B,~WB. , the pitch address in the l coordinate axis direction is
When i advances like 1-1, 2...■
, the coordinate address in the j coordinate axis direction (i-1, j-1, 2.
...J), (l=2, j-1, 2...J
)...(i-1, j-1, 2...J)
Each absolute address is 1024 absolute addresses.
Consecutive addresses are assigned so that
It means that. The third address part PAO■×i is the address in the j coordinate axis direction.
The coordinate in the i-coordinate axis direction is i-1,
2...When you step forward like I, the absolute ad
The response is preset in the waveform bank data section [DATA].
pitch address offset data PAOk. (No.
4). The fourth address part ADma■, (WBκ) is the m-th wave
Shape bank BANK. in. waveform bank WB,
Represents a paired address. [4] Interpolation and synthesis of waveform data The waveform memory 2 has a three-dimensional coordinate address system for each bank group.
The basic segment waveform data stored in (1, j, k)
The data f▲0 is used as the starting address to obtain a discrete pitch.
By address i, level address j and pitch address k
and read the pitch and level corresponding to the intermediate address.
Enka basic segment waveform data with bell and pitch
The composite waveform signal F. v, (ωt) as its surrounding coordinate a
The eight basic segment waveform data written in the
Performs interpolation calculations such as three-dimensional synthesis based on data.
go For example, as described above with respect to Figs. 8 to 11,
Regarding the dan axis direction, l coordinate axis direction, and j coordinate axis direction.
Each variable pin corresponds to an address between discrete addresses.
PICH. , fluctuation level LEVLv and key code
When KC, is specified, the corresponding key code directory
pitch directory and envelope directory
The weight of the file data specified by
Since the coefficients are β11, TV, and αyu, respectively,
The pitch, level, and pitch of the musical sound to be generated are three-dimensional waves.
Coordinates of shape data space [(i+β.), (j+γv), (
k±α. ．． ) The waveform data corresponding to position 1 is transferred to the 12th position.
As shown in the figure, the surrounding eight coordinates, namely (i, L
k), (i+1, L k), (i+1, L k+1),
(t, j, k+1), (is j+1, k), (i+
1, j+1, k), (1+1, j+l, k+1), (i
, j+l, k+1) as the starting address
waveform data f five * s f fj+
I) jk, f (1611J (II411
, f 1jr&+ll % f Z(j+I)lk
x f (je+) (j+Ilk −.f(i
Jul (k.++ f
t (j+l+...,, (Figure 13)?
Equation F. v, (ωt) = α. βurvfiJk? α, βa (1-ry) f ■ j + I) k ten α8 (1-
βU) γV f (inl jk+α, (1-βm)(
1- γw)f (i order IJ (jslLk+(1
-α1) βu T v f tJ (kil1+(1-
α, 1) βt+(1 7 v”) f i (Ju
l) (mo+1+(1-α-)(1-β-γw f
(1+l) J (++◆elutriation 1+(1-α.)(1-β
u) (1-γv)r (i+1) (j*1>.Ya.・
・・・・・・ As shown in (14), interpolation is performed using weighting coefficients β1, γ9, and α8.
By calculating the composite waveform data F avw (ωt)
Synthesize as . In equation (14), f tjk−, f +《j◆1
》Friend・f《５・Iljk% f （１◆１
》《j◆鳳)k% flj(k+I1・
f lLj*1》(k*H , f (1+IIJ(k+
+1, f tt4N (jya.》.ya., respectively)
Target address (i, j, k), (i, j+1, k), (l
+1, j, k), (i+1, j+1, k), (i, j,
k+1), (t, J+1, k+1), (l+1, j, k
+1), (i+1, j+1, k+1)
Each sample data of basic segment waveform data (
Figure 13). The sum that can be obtained by interpolation in this way is
Waveform signal F. v, (ωt) are as shown in Figures 8 to 10.
As mentioned above, the weighting coefficients β1, γ,, α. By
Then, the distance between the eight points on the ijk coordinate address is determined by the weight coefficient.
Number β. , the coordinate position internally divided by the ratio of γ9 and α8, that is,
(i+β., j+rw, k+αw), and
Each term in equation (14) can be extracted from the internally divided coordinates.
is the ratio of the distance to the eight coordinate addresses surrounding the area.
Basic segment waveform stored at each address accordingly
Indicates that the data is included as a composite waveform component.
Ru. That is, the weighting factor β. , γ,, α1 as β6→l, γ
,→1, α0→l, interpolation
The position of address (l+βe, j+TV, k+αw) is
As you approach the dress (l+1, j+1, k+1)
Then, the composite waveform signal F0. (ωt) (Equation (14))
Of the signal components of basic segment waveform data fiJk
Coefficient α. β. While γ, approaches 1, its
Other basics? Mention waveform data feTj*Ilk~f
u*+, (j+I) (kil+ coefficient α1β.+(
1-TV) ~ (1-αw) (1-βu) (1 rv)
As F. approaches 0, the composite waveform signal F. ■(
ωt) is the basic value stored at address (i, L K)
Approaching the waveform of segment waveform data f ink
．． On the other hand, β, →0, γ, →o1α, −+Q
are weighted with weighting coefficients β, γv1α. As it approaches O, the inner
The position of the insertion address (i+β., j+rV, k+α0) is
As the address (t, j%k) approaches, the composite wave
The signal component of the form signal F1 (ωt) (formula (14)) is based on
This segment waveform data f (!l) (j+ll i
Coefficient of k*11 (1-αw) (1-βu) (1 rv
) approaches 1, while other basic segments
Point waveform data f (1+I) j (k;l) ~f
1jk coefficient (1-cr,,)(1-βu)Tv~α
As wfIuγ, approaches 0, the composite wave
The shape signal Fuvw(ωt) is the address (i+1, j+1,
Basic segment waveform data stored in K+1)
+1+1■j+1) The line approaches the waveform of (k*l).
Ku. ? In the same manner as below, set the weighting coefficient α. As the value approaches 0,
If so, the composite waveform signal F. The waveform of vw(ωt) has four a
Dress (i, JSk+1), (i, j+1, k+1),
(i+1, L k+1), (i+1, j+1, k+1)
Basic segment waveform data fiJ(m
・■》・ f i 1j1) (wrinkles/lid)・f (1+
I) j(kl), f(1.l) (Jl). ,,,
The waveform approaches α, and conversely α. As it approaches 1,
, composite waveform signal F. ．． , (ωL) is the address (i
, k), (i, J+1, k), (i+1, j, k), (
Basic segment stored in i+1, J+1, k)
Waveform data r5, fi (J+heavy),, f (1.,)
Jk s f (1*I) (j*I) waveform of II
Get closer. In this way, the weighting coefficient α8 is set to a predetermined value as necessary.
If selected, each waveform bank group BANK. (m-1, 2・
...M), interpolation address in the k coordinate axis direction
, therefore, the pitch corresponding to all key code signals KC is
A waveform representing a musical tone is synthesized as a waveform signal F. ■Compensate as (ωL)
Interpolation synthesis can be performed using open operations. For each key code signal KC that can be synthesized in this way,
For the corresponding interpolated basic segment waveform, i coordinate axis direction
The weight coefficient β for the direction. and in the direction of the j coordinate axis.
By selecting the weighting factor TV, pitch fluctuations and
Or perform interpolation calculations on musical sound waveforms when level fluctuations occur.
Therefore, interpolation synthesis is possible. As a result, each bank group BANK. In (m-1-M)
, the individual loss K of waveform bank WBm (k-1 to K) is
- Number of key codes that can be specified by code signal KC (
In this example, if the number is smaller than 128)
Also, waveform bank WB. We require a weighting factor α,
It will be possible to set one or more depending on the need.
Creates a waveform bank that corresponds to all key codes.
Determine the compensated basic segment waveform data by interpolation calculation.
You can Similarly, for each waveform bank WBk, the l coordinate axis
Maximum number of addresses in the direction ■ Larger number of pitch variation steps
If necessary, write to sequentially adjacent addresses in the i-axis direction.
Stored basic segment waveform data f tJk and
One or more weighting coefficients β1 between
By setting the maximum number of addresses! more pips
Even if you set the number of change steps, the waveform will differ depending on the number of steps.
This segment waveform data can be obtained. Furthermore, in the same birch, in the j coordinate axis direction, waveform bank W
B. It is necessary to have a number of level variation stages greater than the maximum address J of
If necessary, add the corresponding address to the adjacent address in the
Basic segment waveform data fiJ stored in each
one or more weights based on k and fl(j+l)k
By setting the coefficient Tv, more records than the maximum number of addresses J can be set.
Interpolated basic segment waveform data for bell variation stage number
Obtainable. [5] Waveform synthesis circuit of waveform memory The waveform memory 2 stores waveform bank data as shown in FIG.
Store the waveform data in the data section (DATA) (Figures 4 and 5).
It has a waveform data memory section 3l that stores it, and continuously outputs it.
While forming the number S1 in the control section 32,
Basic segment read from waveform data memory section 31
The waveform data signal S2 is supplied to the interpolation synthesis calculation section 33.
The interpolation synthesis calculation unit 33 receives the basic segment waveform data signal S.
2 is received by the first stage interpolation circuit 33A and the control unit 32
under the control of a control signal CLI given from
Level fluctuation in the j coordinate axis direction using numerical data γ,
Interpolation calculation according to the amount is executed and the calculation data signal S3 is
It is sent to the two-stage interpolation circuit 33B. The second stage interpolation circuit 33B receives a signal from the control section 32.
Coefficient data β under the control of control signal CL2
. According to the amount of pitch variation in the i-coordinate axis direction using
Interpolation calculation is executed and the calculation data signal S4 is sent to the third stage interpolation circuit.
Send to route 33C. The third stage interpolation circuit 33C is a control
Control of control signal CL3 given from control section 32
Regarding the k coordinate axis direction using coefficient data α1 under the control
? - Execute compensation calculation according to the pitch corresponding to the chord signal
and transfer the calculated data signal S5 from the waveform memory 2 as a musical waveform signal.
Envelope adding circuit 25 (see Fig. 1) as No. WDATA
). The control section 32 operates as described above with respect to FIG.
Bank group selection given to waveform memory 2 as shape succession condition
Selection signal SEL. ■, waveform bank selection signal SEL■, pin
Receives a switch designation signal PICH and a level designation signal LEVL.
At the same time, the continuous waveform signal READ is used as sampling data.
Received as a read timing signal. In this example, selection condition data file management data section
CFILE) (Figure 6) and waveform bank address conversion text.
The table data section (TABLE) (Figure 7) is control data.
It is stored in the memory unit 34 as control data S6,
The control unit 32 is designated with the control data S6.
It is read out according to the control conditions and stored in the waveform data memory section 31.
The interpolation synthesis calculation section
The first stage interpolation circuit 33A and the second stage interpolation circuit composing the
Control for 33B and 3rd stage interpolation circuit 33C
Signals CL1, CL2, CL3 and coefficient data βu, rV
s α. form. Thus, the control unit 32 (
14) The composite waveform signal F. ,,(ωt
) Basic segment waveform data required when performing interpolation calculations
f positive ~ f (ioll (j++1..,,) as waveform data
Basic segment waveform data signal S from data memory section 31
2, read out sequentially in a predetermined order, and
The corresponding coefficient data TV, β1, α1 are synchronized with
1st stage, 2nd stage, and 3rd stage interpolation circuits 33A and 33B in order.
, 33C, and is thus expressed by equation (14).
The composite waveform signal F. v. Calculated data signal consisting of (ωt)
S3 is sent from the interpolation synthesis calculation section 33.
There is. 1st stage, 2nd stage, 3rd stage interpolation circuits 33A, 33B, 33
C is shown for the first stage interpolation circuit 33A in FIG.
It consists of an interpolation synthesis calculation circuit like this. In other words, is the first stage interpolation circuit 33A a basic segment? Waveform data
The coefficient input circuit 36 receives the data signal S2 in the multiplication circuit 35.
is multiplied by the coefficient signal Sll given by . Coefficient input
The circuit 36 supplies the coefficient latch circuit 37 with the latch signal φ1.
When the coefficient data Tv is latched, the latch output
In response to the complement/non-complement selection signal φ8 in response to the force signal 312
The content is the complement or non-complement of the latch output signal 312.
A coefficient signal Sll is sent out. In this embodiment, the complement/non-complement selection signal φ2 is the logic r■
, the coefficient input circuit 36 inputs a latch consisting of coefficient data γ9.
The complement (1-r,) is calculated based on the output signal S12.
While it is supplied to the multiplication circuit 35 as a number signal Sll
, when the complement/non-complement selection signal φ■ is logic “1”, the coefficient data
The latch output signal S12 consisting of the data Tv is directly input as a coefficient.
The signal is supplied to the multiplication circuit 35 as the signal Sll. The multiplication output signal S13 of the multiplication circuit 35 is sent to the addition circuit 38.
and the shift output signal 314 of the shift register 39.
The addition output signal S15 is sent to the output latch circuit 40 and
and the shift register 39. When the output latch circuit 40 is given the latch signal φ,
Latch the addition output signal S15 and use it as the interpolation output signal S3.
is sent from the first stage interpolation circuit 33A, and then sent to the next stage interpolation circuit,
In other words, the input signal is supplied to the second stage interpolation circuit 33B.
Ru. When the shift register 39 is given the load signal φ4,
In addition to capturing and storing the addition output signal S15 internally,
, and the shift pulse signal φ.
The addition output signal S15 is sequentially shifted as the output signal 314.
It is supplied to the adder circuit 38. Here, the basic segment supplied from the waveform data memory section 31
ment waveform data signal S2 is shown in FIGS. 12 and 13.
As mentioned above, the key code of the musical note to be interpolated is
corresponding to the pitch variation and level variation based on the
Eight coordinate addresses (i,
”, k) ~ (t+i, J+1, k+1)
basic segment waveform data r ijk"" f (i
*Il jJ411 (Kill, these basics
Segment waveform data is as described above for Figure 3.
1024 samplings from 0th to 1023rd
Consists of data. The first stage interpolation circuit 33A is the Oth to
Multiplying circuit 3 sequentially processes the 1023rd waveform data one by one.
5. Adder circuit 38, output latch circuit 40, shift register
Arithmetic processing is performed in the data processor 39. The second stage and third stage interpolation circuits 33B and 33C are the first stage interpolation circuits.
It has the same circuit configuration as circuit 33A, and is input to multiplier circuit 35.
For the waveform data signals S3 and S4, the latch signal φ
．． , is latched by the coefficient latch circuit 37 by φ81.
Coefficient data β. , α0 to the coefficient input circuit 36.
The complement/non-complement selection signal φ. ,φ. ! selected by
coefficient data β. , α i or its complement and add
The addition output signal S15 is supplied to the arithmetic circuit 38 and latched.
The output latch circuit 40 is latched by the signals φl3 and φl3.
When the interpolated output signals S4 and S5 are sent out by
Both shift registers are controlled by load signals φI4 and φ24.
Is the shift pulse sent to data 39? φ1s, φt,
Therefore, the input of the adder circuit 38 as the shift output signal S14
It is made to return to the edge. Note that the control signals CLI and CL2 shown in FIG.
, CL3 are the signals (φ, ~φ,), (φ11
~φ1,) and (φ8, ~φ8,) are collectively expressed.
It is. In Figures 14 and 15, the waveform memory 2 control
As shown in FIG.
Operation cycles SY1, SY2, etc. having T0 to Tl1
..., the first stage, second stage, and third stage interpolation circuits 33A,
Perform calculation operations while synchronizing 33B and 33C.
Therefore, for each calculation cycle SY1, SY2...
(14) The composite waveform signal Fu,, (ω
t) is executed. Here, the length of the processing period T0 to T11 is the basic segment
The sampling data of waveform D■2 (Figure 3) is one waveform.
The time required for processing is selected, for example, 5 minutes.
0(k}lz), thus each
Calculation cycle SY1, SY2... is 600 [kHz
) is repeated at a period corresponding to . The control unit 32 performs processing in the calculation cycle SY1 of FIG.
During period T0, the coefficient latch of the first stage interpolation circuit 33A
The circuit 37 latches the coefficient data γ9 and shifts
Clear register 39. At this timing, the coefficients of the first stage interpolator 33A are input.
The output circuit 36 has a complement/non-complement selection signal of logic "0" level.
The coefficient input circuit 36
The multiplication circuit 35 uses the coefficient data Tv as the coefficient signal 311.
is controlled to a non-complement selection state as given by . Thus
The first stage interpolation circuit 33A starts calculation processing of calculation period SYI.
Initialized to state. In this state, the control unit 32 controls the processing period T. to
Basic segment waveform from waveform data memory section 31
Basic segment waveform data f i as data signal S2
nk is read out and input to the multiplication circuit 35, and the coefficient
At the same time as controlling the input circuit 36 to the complement selection state, the shift
By applying the input signal φ4 to the register 39,
Run the code. As a result, the multiplication output signal S13 is added through the adder circuit 38.
Loaded into the shift register 39 as the calculation output signal S15
As a result, the shift register 39 receives the following formula S14A1=(1 7v)ftji+...-
--- (ts)? The calculated data S14A1 represented is saved.
held. In addition to this, the control unit 32 also controls the processing period T.
latched into the coefficient latch circuit 37 of the second stage interpolation circuit 33B.
The coefficient data β8 is latched by applying the check signal φ, .
and clear the shift register 39.
Initialize to the summer start state. Subsequently, the control unit 32 at the next processing time T2
, the basic segment as the basic segment waveform data signal S2.
waveform data f. . ．． 1■ of the first stage interpolation circuit 33A
Input to the multiplier circuit 35 and complement/non-complement selection signal
Control the coefficient manual circuit 36 to non-complement selection state by φ2
By doing so, the coefficient data TV is inputted from the coefficient input circuit 36.
If it is directly supplied to the multiplication circuit 35 as the coefficient signal Sll,
At the same time, the output latch circuit 40 is activated by the latch signal φ3.
Operate the latch. At this time, the adder circuit 38 shifts and outputs the multiplication output signal 313.
Adding the force signal S14, S15A1-(1-γv) f tj* +
γ v f Z (j+I) k・・・・・・
(16) Add the calculation data S15A1 expressed as
315 to be latched by the output latch circuit 40. Thus, the first stage interpolation circuit 33A is expressed by equation (16).
The calculated data S15Al is used as the interpolation output signal S3.
The state is such that the signal is supplied to the second stage interpolation circuit 33B. In addition to this, the control section 32
Then, the coefficient is input to the coefficient latch circuit 37 of the third stage interpolation circuit 33C.
The data α is latched, and the shift register 39
Interpolation operation can be started by clearing
Initialize the state. Subsequently, the control unit 32 performs the following processing in the next processing period T3.
, the coefficient input circuit 36 of the second stage interpolation circuit 33B is selected as a complement.
By controlling to select state, the complement of coefficient β1 (1-β.) is controlled to be output as coefficient signal Sll.
Shift register /39 is loaded. At this time
The multiplication circuit 35 of the two-stage interpolation circuit 33B is represented by (16) 2.
Since the calculation data Sl5A1 is given,
The multiplication output signal obtained by multiplying this by the coefficient data (1-βU)
Therefore, the following equation S14BI=(1
-β-) (1 r v) f i. +(1-βJrv
The calculation data 314B1 consisting of f, u+n++ ...... (17) is the addition output of the addition circuit 3 days.
State of loading into shift register 39 as signal S15
become. At the same time, the control unit 32 controls the first stage interpolation circuit 33.
By clearing shift register 39 at A
Waiting for new basic segment waveform data signal S2
Set to state. Subsequently, the control section 32 performs the following processing at the next processing time T.
The basic segment waveform data signal S2 is the new basic segment waveform data signal S2.
The segment waveform data f (i+l)Jk is interpolated in the first stage.
It is input to the multiplication circuit 35 of the circuit 33A, and also
At the same time, the shift lever is switched to the complement select state.
The register 39 is loaded. As a result, the multiplication output signal S13 passes through the adder circuit 38 to the next
Formula S14A2=(I Tv)f+1+IIJk'
...... Calculated data S expressed as (18)
The state held in the shift register 39 as 1 4A2
is obtained. Subsequently, the control unit 32 performs the following processing in the next processing period T.
The basic segment waveform data signal S2 is the new basic segment waveform data signal S2.
component waveform data f(▲ell (j+1- multiplied by the first stage interpolator 33A)
At the same time, the coefficient input circuit 36 is input to the calculation circuit 35 and the coefficient input circuit 36 is
At the same time as controlling the number selection operation state, the output latch time g4
0 is latched. At this time, the adder circuit 38 performs the operation described above for (18) 2.
Adding the calculation data S14A2, the following formula S 1 5A2 = (
I Tv) f. <h,. , jm±γv f (1*
+1 +j, l1k... (19) The calculation data S15A2 expressed as
This is latched into the circuit 40 and used as the interpolation output signal S3.
The state is such that the signal is supplied to the second stage interpolation circuit 33B. Subsequently, the control unit 32 performs the following processing in the next processing period T.
Non-complement selection of coefficient input circuit 36 of second stage interpolation circuit 33B
At the same time as switching to the operating state, the output latch circuit 40 is latched.
Make it work. At this time, the shift register 39 contains the processing period.
Calculated data 3 1 4 B loaded during interval T,
1 ((17) 2) is held, the addition
The calculation circuit 38 multiplies this calculation data 314B1 into an output signal.
Adding to S13, the following formula 315B1 -(1-βu)(1-γv)f ljl++(1~βU
)γv f i(j+Il k+β4(1-γv)f
(1+I)jk+ βa7vf (j++) (ノ
411m・・・・・・(20) Output data 3 1 5B2 expressed as
latch circuit 40. At the same time, the control unit 32 controls the processing period T.
and clears the shift register 39 of the first stage interpolation circuit 33A.
A new interpolation calculation operation can be performed by operating the
Set it to the state. The control unit 32 controls the third stage in the next processing period T7.
Complement/non-complement selection of coefficient input circuit 36 of interpolation circuit 33C
signal φ. from logic “1” level to logic “0” level.
By switching, the complement selection state is controlled, and the system
By applying the load signal φ14 to the shift register 39,
Load operation again. At this time, the multiplier circuit 35 of the third stage interpolation circuit 33C has the
Timing is applied to the output latch circuit 40 of the two-stage interpolation circuit 33B.
Operation data 3 1 5 latched during processing period T.
Since B 1 (formula (20)) is supplied,
, a shift register via a multiplication circuit 35 and an addition circuit 38
39, the following formula 314C1 = (1-α,) (1-β1) (1-γw) f 1m
+(1 − αw ) (1− β u)Tvft+
j+ 1, +(1-αw)βu(I T v )
f iioN jk+(1-α8)β. γvf
(LSI1(j*llk... (21) State where calculation data 314C1 is held
is obtained. In addition, the control unit 32 controls the
New basic segment in multiplication circuit of 1-stage interpolation circuit 33A
Basic segment waveform data' as waveform data signal S2
lJ(*.,,, and compensate the coefficient human power circuit 36.
When controlling the number selection state, the shift register 39 is
Make the load work. As a result, the shift register 39 uses the following formula S14A3-(1-γv)fztn-n-
= Computed data S14A3 expressed as (22)
A state is obtained in which . Furthermore, the control unit 32 controls the processing period T,
Clears the shift register 39 of the second stage interpolation circuit 33B.
Set to a state where new calculations can be started by
do. Subsequently, the control unit 32 performs the following processing in the next processing period T8.
, a new basic set is added to the multiplication circuit 35 of the first stage interpolation circuit 33A.
Basic segment waveform as segment waveform data signal S2
Given the data fij*11 (1++l1 and
, at the same time as controlling the coefficient input circuit 36 to the non-complement selection state.
Then, the output latch circuit 40 is operated to latch. As a result, the output latch circuit 42 of the first stage interpolation circuit 33A is
The following formula S15A3-(1- γv)f ij(k++1+
T v f th j + I) (kl)... (
23) The calculation data S15A3 expressed as
This is supplied to the second stage interpolation circuit 33B. continue
The control unit 32 controls the second stage in the next processing period T.
Controls the coefficient input circuit 36 of the interpolation circuit 33B to the complement selection state.
At the same time, the shift register 39 is loaded.
. At this time, the second stage interpolation circuit 33B is the first stage interpolation circuit 33A.
Calculation data S15A3 ((23)
Based on the equation), the signal is
The following formula S14B2=(1-βu)(I
T v)f ij(kil1+(1-β.)γ
vfi+j. ,) 1,... (24)? Holds the calculation data 3 1 4B2 expressed as
Becomes a state. In addition, the control unit 32 controls the
Clear the shift register 39 of the 1st stage interpolation circuit 33A
The state is set so that new calculations can be started. Subsequently, the control unit 32 starts the processing period T. new in
Basic segment waveform data signal S2
ment waveform data f (l.1■.I+1 is interpolated in the first stage
It is applied to the multiplier circuit 35 of the circuit 33A, and the coefficient input circuit
At the same time, the shift register 36 is controlled to the complement select state.
Load the star 39. As a result, the following formula is written in the shift register 39... (26) S14A4 - (1 rv)f+=-++
j<Mai-n... (25) The calculation data S 1 4A4 expressed as
The state is obtained. Subsequently, the control unit 32 performs the following processing in the next processing period Tl1.
A new basic set is added to the multiplication circuit 35 of the first stage interpolation circuit 33A.
Basic segment waveform as segment waveform data signal S2
data f fil1). ．． ,,. ．． ，，As well as giving
, at the same time as controlling the coefficient input circuit 36 to the non-complement selection state.
Then, the output latch circuit 40 is operated to latch. As a result, the shift register is passed through the multiplier circuit 35 and the adder circuit 38.
Calculated data S14A4 ((
25) and the following formula S 1 5 A 4 = (I
T v) f (ill) J (k * 1) + T v f
(III) (J*+1 <hen)
The calculation data S15A4 is latched to the output latch circuit 40.
The latched state is obtained, and the latch output is used in the second stage interpolation circuit.
33B. Thus, the first calculation cycle SYI is completed, and the control
The control unit 32 enters the next calculation cycle SY2, but the initial
In the processing period T0 and T, the previous calculation cycle SYI
The basic set read from the waveform data memory section 31 at
The second stage interpolation circuit 3 performs calculations on component waveform data.
3B and third stage interpolator 33C. In other words, when entering the processing period T0 of the calculation cycle SY2, the control
The roll unit 32 is the coefficient input circuit 3 of the second stage interpolation circuit 33B.
6 to the non-complement selected state, and the output latch circuit 4
0 is latched, thereby the first stage interpolation circuit 33A
The calculation data S given from the output latch circuit 40 of
Multiplying circuit 35 and addition using 15A4 (formula (26))
Through the circuit 38, the following formula SL5B2 = (1-βu) (1 r v) f ti (ki
l1+(1-βII) T v f l (Jul)
(k+1>+β.(1-γv)f<t*nitw*
n+ β urvf (5*1) (J+Il
+I+111>... (27) The calculation data 315B2 expressed as
A state maintained at path 40 is obtained. Then, in the next processing period T1 of the calculation cycle SY2, the controller is
The troll section 32 is a coefficient input circuit for the third stage interpolation circuit 33C.
36 to the non-complement selection state and the output latch circuit.
40 is latched. As a result, the third stage interpolation circuit 3
Shift register through 3C multiplier circuit 35 and summer circuit 38
Calculated data S l 4 C held in star 39
1 (Equation (21)), the following equation 315C1 = (1-αw) (1-βu) (1-γv) f! Jk+(
1-α1)(1-βJ rvr i(J+Ilk+(1
−αw)β. (1-TV) f (i+II41++
(1-αw)βu7vf(▲+I) (J*I)k+α
, (1-βu) (1 r v)f IJ (k*
+1+αw (1-βU)γv f i (11) 4
141)+α−βu(I T v ) f (14
0 7 (I+1111+ α− β w T v
f (101) (j −1+ +k++1
...-(2B) The calculation data S15C1 expressed as
It is possible to obtain a state latched to the path 40, and this is
Output from the stage interpolation circuit 33C as an interpolated waveform data signal S5.
It becomes a state of strength. The interpolated output signal S5 that can be obtained in this way is
It is clear by comparing equation (28) with equation (14) that
, a performance with the same content as the composite waveform signal Fuvw(ωL)
The musical waveform signal in waveform memory 2 becomes
WDATA can be obtained. ? 6] Waveform memory of the second embodiment FIG. 17 shows the configuration of the waveform memory 2 of the second embodiment,
As shown by assigning the same reference numerals to the corresponding parts as in FIG. 14,
The waveform data memory section 31 reads the first waveform data based on the readout signal S1.
As shown in Figure 19, eight processing periods T! . ~T'tt
During the calculation cycles SYII, SY12...
, the basic segment that constitutes the signal component of each term in equation (14)
ment waveform data f. 4, ~f (il1■4., . .,, is read out as the basic segment waveform signal S2.
Multiplyed by the coefficient data signal S31 in the multiplication circuit 51,
The multiplication output signal S32 is supplied to the addition circuit 52. The control unit 32 receives coefficient data α. , β. ,． TV
It is supplied to the coefficient creation circuit 53 and the coefficient part of each term in equation (14) is
The creation coefficient signal S33 consisting of data is sent to the selector 54.
and select it to obtain it as the coefficient data signal S31.
has been done. Here, the coefficient generation circuit 53, as shown in FIG.
Data α1 is given to the coefficient input circuit 55 to control the control section.
32 (Fig. 17) as part of the control signal CLll.
Coefficient input according to the output complement/non-complement selection signal φ3l
The circuit 55 is controlled to a non-complement selection state or a complement selection state.
When the coefficient data α8 or (l−α.) is set as the coefficient selection signal S
41. This coefficient selection signal S41 is given to the multiplication circuit 56, and
Number data β. is multiplied by the coefficient α8βd or
Obtain the multiplication output signal 342 whose content is (1-α8)β1.
Ru. The coefficient selection signal S41 and the multiplication output signal S42 are provided by a subtraction circuit.
57 as the subtracted input and the subtracted input, and its output
α at the force end, (1-βU) or (1-αo) (1-βU)
A subtracted output signal S43 having the content is obtained. This subtraction output signal S43 is applied to the coefficient data in the multiplication circuit 58.
α1(1-βU)γ
Multiplication with content 9 or (1-αw) (1-βU) γ9
An output signal S44 is obtained. Moreover, the subtraction output signal 543 and the multiplication output signal S44 are
It is applied to the circuit 59 as an input to be subtracted and an input to be subtracted.
At the output end of α. 4 (1-β.,) (1-TV) or (1
-α1)(1-βu)(1rv) Subtraction calculation
A force signal S45 is obtained. Further, the multiplication output signal 342 is input to the coefficient data in the multiplication circuit 60.
is multiplied by the data Tw, and the output terminal is α, β, γ, or (
1-α1)β. The multiplication output signal S46 whose content is γ9 is
obtain. Further, the multiplication output signals S42 and S46 are applied to the subtraction circuit 61.
It is given as a subtraction input and a subtraction input, and α at its output terminal is
1β yo (1-TV) or (1-α.)β yo (1-TV)
A subtracted output signal S47 having the content is obtained. Thus, the coefficient generation circuit 53 receives the complement/non-complement selection signal φ3.
1 puts the coefficient input circuit 55 in a non-complement selection state or a complement selection state.
The four calculation signals 345, S4
4. Select S47 and S46 as creation staff e4K issue S33.
The selector 54 is supplied to the control section 54.
32 as a signal constituting the control signal CL11.
Coefficient selection signal φ. processing period T2. , T.R.I.
, T. , T0, the sequential calculation data signals S45, S4
4, S47, and S46, the coefficient (1-
α, ) (1-βu) (1-rv), (1~αo) (1-
βu)rv, (1-αw)β. , (1-TV), (1-
α1)β. γ. is sent as a coefficient data signal S31,
As a result, in the column of multiplication output signal 332 in FIG.
The signal component shown is obtained at the output terminal of the multiplier circuit 51. Further, the selector 54 selects the processing periods Tt4, Tzs, T
Complement/non-complement selection signal at t h s T z 'r
The signal φ,1 controls the coefficient input circuit 55 to the non-complement selection state.
The calculation obtained at the output terminal of the coefficient generation circuit 53 by
Sequentially select data signals S45, S44, S47, S46
By doing so, the coefficient αw(1-βt+)(1-rv),
α, (1-βu)TV, α. β. , (1-TV), α1
β. γ is sequentially sent out as a coefficient data signal S31.
As a result, the waveform shown in the column of multiplication output signal S32 in FIG.
The signal component is obtained at the output terminal of the multiplication circuit 51. Do it like this
The adding circuit 52 has a processing period of T. . Eight waveform signal components are input sequentially between ~TA, and
The addition output signal 351 is controlled by the shift register 65.
Shift sent as a signal composing the control signal CL11
The maintenance is performed by shift control by the control signal 333.
520 adder circuits add the shift output signal S52.
Give feedback to the force end. Thus, it is calculated as the addition output signal S51 of the addition circuit 52.
Each processing period T2 of cycles SY11, SYL2...
. ~Tt? The multiplication output supplied to the adder circuit 52 at
It is possible to obtain a signal by sequentially cumulatively adding signals 332.
Then, the cumulative addition signal is sent to the output latch circuit 66 under latch control.
It is latched by control signal φ34. In this generous embodiment, the latch control signal φ,, is
The last processing period T, ? of YII, SY12...?
At the same time, the output latch circuit 66 is operated as a latch.
, shift control signal φ,, clears the shift register 65
The output latch circuit 66 is then activated.
The cumulative results of calculation cycles SY11, SYl2...
Therefore, (14) the composite waveform signal described above for 2.
The interpolated waveform data signal S53 representing the signal Fuvw(ωt) is
This can be obtained as a musical waveform signal WDATA.
Send from waveform memory 2. Even if the structure is as shown in Figs. 17 to 19, the structure shown in Figs.
Interpolation calculation similar to waveform memory 2 described above for Figure 16
can be executed. [7] FIG. 20 shows parts corresponding to those in FIG. 1 of the third embodiment with the same reference numerals.
This shows a third embodiment, and the electronic musical instrument 1 in this case is a musical instrument.
Now follows when the sound envelope changes
As the tone changes, the basic segment waveform DI
By smoothly connecting IEFs one after another, you can avoid carelessness.
Don't make noise? This is what we are trying to do. In this embodiment, the waveform data memory section 71 is shown in FIG.
As shown, multiple waveform banks W corresponding to key codes
Bk (k=1-K), and the waveform bank number in the k-axis direction
The key code of the played key is specified by specifying the number k.
It is now possible to select the waveform bank WB that corresponds to the waveform bank WB.
It is. Each waveform bank WBll corresponds to envelope changes.
and enter the coordinate address in the j coordinate axis direction (j=1, 2...
・J basic segment waveform data f having J)
jk is stored, thus the address in the j coordinate axis direction
By switching j as necessary, different waveforms (
Basic segment waveform data with different timbres)
It is designed so that it can be read out. The basic segment waveform data fjk is as shown in Fig. 22.
, the sampling data at the beginning, i.e., number O
Eye sampling data LV● is the basic 7 segment waveform
Selected for a certain level (e.g. O level) of
and the end point, that is, the 1023rd sample.
Ring data LV,. ■ is the same signal level as the starting point.
No. level (i.e., O level). Thus, the basic segment waveform data at a given address j
After reading fJk, read the basic segment of other addresses.
When reading the point waveform data, the first
The level of the waveform data and the value at the start of the next successive waveform data.
The level of the second waveform data
smooths the two waveforms at the joint of the waveform data.
It is designed so that it can be connected to. Read signal READ given from address counter section 3
is input to the waveform data memory section 71 through the adder circuit 72
At the same time, the repeated signal READ is detected as a repeat end detection circuit.
The contents of the read signal READ can be changed by applying the signal to
The last sampling pick-up (i.e. S M P =1
023), the rebeat end detection signal 341 is activated.
This is generated and sent to the address return of address counter section 3.
is applied to the signal input terminal. ? By doing as follows, reading of address counter part 3 is possible.
The output signal READ is the last sample of the basic segment waveform D.
When it comes to sampling pick-up, read address counter section 3.
Return to the output start address (i.e. sampling number 0)
By repeating sampling number O-1023,
The waveform data mem-
Repeats the basic segment waveform data fjk from the memory section 71.
It is designed so that it can be read back. In addition to this, waveform memory 2 is an envelope waveform generation circuit.
The envelope signal ENV of section l6 is set as the level designation signal LE.
As shown in FIG. 23, the waveform switching level detection circuit 74 receives the signal as VL.
The signal of the envelope signal ENV that forms the attack waveform.
The signal level is a predetermined signal level ENV, , ENVz,
When ENV3 is reached, this is detected and the waveform switching signal S
42 is given to the waveform selection circuit 75. Here, the waveform selection circuit 75 is the waveform switching level detection circuit 7
4 is not transmitting the waveform switching signal S42,
Address whose content is to set the address shift amount to 0
The shift signal S43 is sent to the adder circuit 72, thereby
The waveform data memory section 71 reads out the address counter section 3.
Specifying an address determined only by the signal READ
For example, it is stored at the reference coordinate address j=1.
state to read the basic segment waveform data flk.
Control. In this state, the envelope waveform generation circuit section l6
The envelope signal ENV is at the signal level ENV. of FIG.
, the waveform selection circuit 75 selects the waveform obtained at this time.
A predetermined address shift amount is represented by the switching signal S42.
Address shift signal S43 is applied to adder circuit 72. As a result, the waveform data memory section 71 has an address shift
Address signal consisting of the sum of signal 343 and read signal READ
By giving a signal, the corresponding address shift amount is
Basic segment stored at shifted address location
The state changes to the state where the waveform data is read. In this state, the envelope signal EN■ {8
The signal level becomes high and the switching level ENV. ,ENV. of
The waveform switching signal S42 is output each time the
In response to this, the waveform selection circuit 75 further selects a predetermined shift amount.
The address shift signal 343 with the contents shifted by
This allows the data to be read from the waveform data memory section 71.
The timbre of the musical waveform signal WDATA is switched.
go. Here, the waveform selection circuit 75 is a repeat end detection circuit 73.
Switching timing signal for repeat end detection signal 341
The repeat end detection signal 341 is generated in response to the input terminal.
Switching of address shift signal S43 occurs for the first time when
Execute the operation. By doing this, the waveform data
Basic segment waveform data for one cycle from memory section 71
The waveform switching register is set while reading fjk.
When the bell detection circuit 74 generates the waveform switching signal S42
In order to repeat the change in the address shift signal S43,
When the code detection signal S41 is generated? Looks like I'll have to wait until
This causes the musical waveform signal WDATA to
Waveform switching is always at the reference level of basic segment waveform D.
In other words, it will be executed when the level reaches 0.
As a result, the musical waveform signal WDAT whose tone changes smoothly
A can be formed. [8] FIG. 24 shows corresponding parts with the same reference numerals as those in FIG. 20 of the fourth embodiment.
shows the fourth embodiment, in which the basic segment
In order to smoothly switch the waveform, the basic segment
Even if the DIIEF waveform is at any signal level, switching is not possible.
You can smoothly switch from the previous waveform to the new waveform.
I am trying to make it possible. The waveform selection circuit 75 in FIG. 24 is different from that in FIG.
The waveform switching signal 34 is output from the waveform switching level detection circuit 74.
2 is obtained, the address shift signal 343 is immediately applied.
It is output to the calculation circuit 72. In addition to this, in the case of Figure 24, the waveform data? Mori club
The waveform data signal S51 read from 71 is sent to the interpolation circuit.
At 81, the complementation coefficient given from the complementation coefficient control circuit 82
After being interpolated using the coefficient data δ, the musical waveform signal is
It is sent from waveform memory 2 as WDATA. The complementarity coefficient control circuit 82 operates at time tC in FIG. 25(A).
Waveform switching is performed from the waveform switching level detection circuit 74 at NS.
In the state before the detection signal 351 is obtained, the correlation coefficient data
δ−1 is supplied to the interpolation circuit 81 as δ. and the point in time
tCH! When the waveform is switched at
The control circuit 82 once lowers the complementarity coefficient data δ to δ10.
After that, start up to δ-1 as time t passes.
, when δ = 1 at time t,■, this state will occur.
Execute control of interpolation coefficient data δ to maintain the
. As shown in FIG. 26, the interpolation circuit 81 receives the waveform data signal.
S51 is inputted to the subtraction circuit 85 as the signal to be subtracted, and the
The subtraction output signal S61 is given to the coefficient multiplication circuit 86 to calculate the complementary relationship.
Multiply by numerical data δ and add the multiplication output signal S62
The output signal 363 is delayed by one waveform period through the path 87.
Input to extension circuit 88. The one waveform period delay circuit 88 receives the sequentially arriving samplings.
Consists of a shift register that stores data for one waveform period.
The delayed waveform data S64 is reduced by the vacuum reduction circuit 85.
Provided as calculation input and addition input to addition circuit 87
It is given as . In the configuration of Figs. 24 to 26
, in the period before time tc,1m in Figure 25(A).
Accordingly, the address shift signal S43 of the waveform selection circuit 75
The waveform data exhibiting changes as shown in Figure 25 (B).
In the state where the data signal 35 1A is being sent, the time point
t At CHS, the waveform switching level detection circuit 74 detects the waveform
By sending the switching signal 342, the waveform selection circuit 75
reads the waveform data signal 351B in FIG. 24(B).
state, the interpolation circuit 81 receives the waveform data signal.
No.S5 Perform interpolation calculation based on the deviation of 1A and S51B.
Execute. In other words, at the timing before the switching start point t CHI
, the waveform data signal before switching is sent to the subtraction circuit 85 of the interpolation circuit 81.
No. S5 1A is given, and this is one waveform period.
Sent as delayed waveform data S64 from the delay circuit 88
It is. At this time, the subtraction output signal S61 of the subtraction circuit 85
is the state where there is no deviation, that is, S5 1A-35 1A=O
Therefore, the coefficient multiplication circuit 86 calculates the coefficient δ−
The multiplication output signal S62 obtained by multiplying by 1 is also 362-0
It is. Therefore, the delay waveform given to the adder circuit 87
The data S64 is delayed by one waveform period through the adder circuit 87.
The waveform before the start of switching is returned to the input end of line 88.
The shape data signal S5 1A is stored in the one waveform period delay circuit 88.
The maintained state is obtained, and this is also added to the adder circuit 87.
From the output end to the waveform memory 2 as musical waveform signal WDATA
Sent from . Eventually, the switching start point t CM! smell
The waveform data signal S51 input to the interpolation circuit 81 is
When switching from type data signal S5 1A to S51B,
Subtraction output signal S6 1-S5 1A-S representing the deviation
51B is obtained by the subtraction circuit 85. This subtraction power? No. S
61 is multiplied by the coefficient δ in the coefficient multiplication circuit 86.
, the interpolation coefficient control circuit 82 changes the coefficient δ from coefficient O to 1.
By controlling the addition circuit 87 to
The calculated output signal S63 is the waveform data signal S5 1A before switching.
The subtraction output signal S61=δ(S
51A-351B) are added to the line <<. Eventually, at the switching end point tc■, the interpolated coefficient data δ becomes
When it reaches δ-1, the contents of the addition output 363 of the addition circuit 87
is the switching maintained by the one waveform period delay circuit 88.
Waveform data signal S51A for previous waveform data signal S51A
5 Waveform data obtained by adding the deviation between 1A and 351B
signal, and this means that the addition at the switching end point t,■
The content of the calculation output signal 363 is the waveform data signal 35 after switching.
This means that it has become 1B. This addition output signal 363 is the musical waveform signal WDATA.
is sent out from the waveform memory 2 and delayed by one waveform period.
88, one waveform period delay circuit
Is 88 the waveform data after switching? No. 351B is retained.
Becomes a state. In this way, the interpolation circuit 81 processes the waveform data.
Waveform data having mutually different waveforms are stored in the data memory section 71.
Data signals 35 1A and S51B have been read out in sequence.
When, switching start time t CM! and switching end time t,■
Between the waveform data signal S5 1A before switching and the waveform data signal after switching
Waveform data signal 35 Gradually switch the waveform to 1B.
When the switching end point t CHII is passed, the waveform data signal is
No. 351B is stored in the waveform memory as the musical waveform signal WDATA.
From 2 onwards, it will be ready to send. In this way, according to the configuration of FIGS. 24 to 26,
Envelope signal ENV changes waveform at any time
Lehe/L/ E N V + , E N V z , E
Read from waveform memory 2 due to exceeding N■.
This allows the musical waveform signal WDATA to be switched smoothly.
can.

[9] Other embodiments (1) In the above embodiments, a case was described in which one cycle's worth of sampling data was used as the basic segment waveform data, but instead of this, a plurality of cycles' worth of sampling data could be used. Alternatively, waveform data obtained by compressing sampling data of one period or a plurality of periods may be used. Furthermore, the present invention is applicable not only to cases in which sampling data is used as waveform data, but also to cases in which parameter data for musical waveform formation, such as parameters for FM synthesis and parameters for harmonic synthesis, is used. Interpolation between parameters may be performed between a plurality of parameters corresponding to a plurality of musical sound waveforms. (2) In the first embodiment shown in FIGS. 1 to 16 and the second embodiment shown in FIGS. 17 to 19, interpolation calculations are performed based on the basic waveform data stored in the waveform memory 2. Although an example has been described in which the executed waveform data is converted into a musical tone signal, the same effect as in the case described above can be obtained even if the waveform data stored in the waveform memory is directly converted into a musical tone signal without performing compensation calculations. can be obtained. Furthermore, in the third embodiment shown in FIGS. 20 to 23 and the fourth embodiment shown in FIGS. Although the case has been described in which the data is converted into a musical tone signal, instead of this, the conversion may be made into a post-musical tone signal obtained by performing an interpolation operation based on the read basic waveform data. (3) In the above embodiment, the envelope reduction generating circuit section 16 uses the output of the envelope generating circuit as the initial touch signal INTL and the aftertouch signal AFTR.
In the above, we have described a case in which level fluctuations are caused by controlling the touch signal, but instead of this, it is possible to make it impossible to control by touch signals (therefore, level fluctuations occur based only on the envelope signal), or to change the level by controlling only the touch information. It may also be possible to cause variation. Also, in order to cause a change in level fluctuation amount in the level designation signal LEVL, the expression, ? The amount of variation in the level designation signal LEVL may be controlled by an operator output signal obtained from an operator such as a controller, a modulation wheel, etc., which the performer can change during the performance. (4) In the above embodiment, as a condition for switching the basic waveform data read from the waveform memory 2, when the level designation signal LEVL or the pitch designation signal PICH exceeds a predetermined signal level, this is detected and the basic waveform data is switched. Although we have described the case where switching is performed, the switching signal level may also be changed in accordance with the passage of time.For example, as shown in FIG. 27 for detecting the level of the level designation signal LEVL, , even if the level designation signal LEVL exceeds the same detection level L V 6, the point at which it exceeds is the attack waveform section WAo point t■
Different basic waveform data is read out between the case of txt and the case of the release waveform part WCO time txt after passing through the sustain waveform part WB. In this way, it is actually possible to generate musical sounds with even greater expressive power. (5) In the above embodiment, when obtaining the pitch designation signal PICH, the conditions were set to cause pitch fluctuations based on the initial touch signal INTL and the aftertouch signal AFTR. It is also possible to use the output of a pitch control operator such as the above, and it can be widely applied to cases where the pitch is changed and controlled by the player's operation. (6) In the case of the first and second embodiments, three musical tone control parameters, that is, level information, pitch information, and key code information, are used as three-dimensional address information of the waveform memory 2 having a three-dimensional coordinate address system. In addition to this, the waveform memory 2 is used to allocate a plurality of n musical tone control parameters to each coordinate axis, including time information, controller output information provided as necessary, etc. An n-dimensional coordinate address system may be constructed in the waveform memory 2, and basic waveform data may be read out using the n musical tone control parameters. (7) In the above-mentioned embodiment, the musical tone signal generating device according to the present invention is applied to a single-tone electronic musical instrument, but the same effect as described above can be obtained even when applied to a multi-tone electronic musical instrument. ．． (8) In the above embodiment, the key code signal KC obtained by operating the keyboard section 4 is used as a musical tone control parameter representing pitch information to select the coordinate address in the k coordinate axis direction. The invention is not limited to this, but can be widely applied to electronic musical instruments that do not have a keyboard section, such as sound source units, rhythm machines, etc. (9) In the embodiment shown in FIG. 14, when interpolating the basic segment waveform data signal S2, the weighting coefficient rwSi in the j-coordinate axis direction, the weighting coefficient β1 in the i-coordinate axis direction, the weighting coefficient α in the k-coordinate axis direction, . Although the interpolation calculations are executed sequentially in the order of , the same effect as in the above case can be obtained even if the order is changed in various ways. 0ω In the third embodiment shown in FIGS. 20 to 23, the basic segment waveform data f is stored so that the waveform memory 2 has coordinate addresses in the j-coordinate axis direction and the k-coordinate axis direction. The basic segment waveform data is selected based on the level fluctuation of the level designation signal LEVL by arranging the basic segment waveform data in the i-coordinate direction. If the waveform data is arranged so that the basic segment waveform data is switched according to the amount of variation in the pitch designation signal PICH, each basic segment waveform can be smoothed even when the waveform is switched in the i-coordinate axis direction. can be connected to. 01) In the above-mentioned embodiment, a case was described in which the present invention was implemented by a hardware circuit configuration, but instead of this, a configuration in which signal processing is executed by software means may be used. Even if applied, the same effect as in the above case can be obtained. (12) In the above embodiment, FIGS. 8 to 13
As mentioned above for the figure, the coordinate addresses i-i and i
= i + 1, j = j and j = j + 1, k = k
and address position (i+β
1, j+γ,,k+α. ), the weighting coefficients β1, γ
9. The internal division point by α8 was specified as a position separated by β1, γ, , α from the coordinate address (i, j, k), but in contrast to this, the coordinate address (i, ,L
(1-β.), (1-TV), (1-
Even if a position separated by α8) is specified, the same effect as in the above case can be obtained. [Effects of the Invention] As described above, according to the present invention, reading of basic waveform data and interpolation synthesis using weighting coefficients are executed based on musical tone control parameter information, so that it is possible to read basic waveform data based on musical tone control parameter information and perform interpolation synthesis using a weighting coefficient. It is possible to easily create a variety of interpolated composite waveform data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an electronic musical instrument using an embodiment of the musical tone signal generating device according to the present invention, FIG. 2 is a schematic diagram illustrating the detailed configuration of the waveform memory 2 shown in FIG. 1, and FIG. 4 and 5 are diagrams showing the configuration of the waveform bank data section. FIG. 6 is a diagram showing the configuration of the selection condition data file management data section. The figure is a diagram showing the configuration of the waveform bank address conversion table data section, and FIGS. 8 to 11 show the weighting coefficients α in the k coordinate axis direction, i coordinate axis direction, and j axis direction. ,
Route map and signal waveform diagram for explanation of βu, rw, 1st
2 and 13 are schematic diagrams for explaining the interpolation and synthesis calculation of basic waveform data in a three-dimensional coordinate address system.
Figure 4 is a block diagram showing the detailed configuration of the waveform memory, Figure 15.
The figure is a block diagram showing the detailed configuration of interpolation circuits 33A, 33B, and 33C in FIG. 14, and FIG.
3B and 33C; FIG. 17 is a block diagram showing the detailed configuration of the waveform memory 2 in the second embodiment; FIG. 18 is a block diagram showing the detailed configuration of the coefficient generation circuit 53 in FIG. 17. , FIG. 19 is a diagram for explaining the interpolation synthesis calculation operation, FIG. 20 is a block diagram showing the electronic musical instrument in the third embodiment, and FIG. 21 is a schematic diagram showing the detailed configuration of the waveform data memory section 71 in FIG. 20. Diagram, Figure 22 is the second
Signal waveform diagram showing the structure of the basic waveform data in Figure 1, No. 23
The figure is a signal waveform diagram used to explain the level detection operation.
The figure is a block diagram showing an electronic musical instrument in the fourth embodiment, FIG. 25 is a signal waveform diagram for explaining the interpolation coefficient data δ in FIG. 24, and FIG. 26 is a detailed configuration of the interpolation circuit 81 in FIG. 24. The block diagram shown in FIG. 27 is a signal waveform diagram for explaining another embodiment. 1...Electronic musical instrument, 2...Waveform memory,
3...address counter section, 4...keyboard section, l3...bank group selection circuit, 15...
... Pitch fluctuation waveform generation circuit section, 16 ... Envelope waveform generation circuit section, 25 ... Envelope applying circuit, 26 ... Digital-to-analog conversion circuit, 27 ... ...Sound system. Interpolation in the direction of the younger brother's coordinate axis No. 8 The groove of the back data (DATA) in the figure 4.
Figure I (FIL
Structure of E3 6 Diagram t J Expansion in the coordinate axis direction / 1 Composite movement between the axes of the diagram l γ Figure Mi Leather data memo, details of the ribs 4 Ri 2I Diagram Engellower den No. 's level change younger brother diagram

Claims (2)

[Claims] (1) A waveform data storage means that stores a plurality of basic waveform data corresponding to a plurality of musical tone control parameters in memory areas each having a predetermined address, and a musical tone specifying means that generates musical tone control parameter information according to musical tone specification information. musical tone control parameter information generation means for generating musical tone control parameter information; and said waveform data storage means for generating address information of a plurality of basic waveform data corresponding to said musical tone control parameter information among said plurality of basic waveform data based on said musical tone control parameter information. address forming means for reading out the plurality of basic waveform data corresponding to the musical tone specified by the musical tone specifying means as a musical waveform signal from the musical tone specifying means; a weighting coefficient generating means for generating a weighting coefficient for basic waveform data; and an interpolated synthesized musical waveform signal by multiplying the plurality of basic waveform data constituting the musical waveform signal by the respective corresponding weighting coefficients and synthesizing the plurality of basic waveform data. What is claimed is: 1. A musical tone signal generating device comprising: interpolation synthesis means for forming a musical tone waveform signal; and musical tone signal conversion means for converting the interpolated synthesized musical waveform signal into a musical tone signal. (2) The weighting coefficients are complements and non-complements of each piece of musical tone control parameter information, and the first and second fundamental waveform data are synthesized by multiplying the complements and non-complements by the first and second basic waveform data. 2. The musical tone signal generating device according to claim 1, wherein an interpolated synthesized musical waveform signal is formed from waveform data between two basic waveform data.