JP2526636B2 - Electronic musical instrument - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical tone generation control device for an electronic musical instrument, which controls the generation of musical tones in response to a key pressing operation of each key on a keyboard, and particularly for sostenuto effect control. The present invention relates to a musical sound generation control device for controlling the length of the generated musical sound after the key is released.

(Prior Art) Conventionally, as shown in, for example, Japanese Utility Model Publication No. 59-13657, a device of this type has a key state signal indicating a key operation state by a signal synchronized with an operation timing of an operator for controlling the sostenuto effect. And an AND circuit for inputting an output of the latch circuit and an operator state signal indicating the operation state of the operator, the output of the AND circuit (=
By "1"), it is controlled so that the decay time of the musical sound after the key is released becomes longer. As a result, if the operator is operated while the key is being pressed and the operator continues to operate, even after the key being pressed is released, the decay time of the musical sound related to the released key. Is longer, so that the piano-like sostenuto effect is obtained.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional device, since the latch circuit latches the key state signal only once in synchronization with the operation timing of the operator for controlling the sostenuto effect, Even if the key that was being pressed when it was operated is released and pressed again during the operation of the operator, the key state signal related to the re-keying is not latched in the latch circuit, The decay time of the musical sound after the released key is released is shortened, and the sostenuto effect is not applied. On the other hand, in an actual piano, the decay time of the musical tone after key release in such a case becomes long. As described above, there is a problem that the sostenuto effect by the above-mentioned conventional device is different from that by an actual piano.

Therefore, the same applicant as the present application may file the previous application (Showa 62).
In Japanese Patent Application No. Sho 62-19081 filed on Jan. 29, 2004, "Musical tone generation control device for electronic musical instrument"), a plurality of key information storage channels for storing the key information assigned to each channel by the assignment control means for each channel. A plurality of sostenuto data storage channels respectively corresponding to the sostenuto data storage channels are provided, and each sostenuto data stored in the sostenuto data storage channel and corresponding to the key information for each channel is being depressed at the time of operating the operator for sostenuto. As far as the key is concerned, it is set to a value representing the sostenuto effect addition,
If the same key is repeatedly pressed while operating the same operator, set it to the same value as the sostenuto data related to the previous key press, and repeatedly press the same key while operating the sostenuto operator. In this case, a device was proposed in which the sostenuto effect is added to the musical sound related to the repeatedly pressed key.

However, in the proposed device, since the sostenuto data corresponds to the assigned key information, for example, the operation time of the operator for sostenuto is long and a large number of key presses and depressions on the keyboard are performed during the sostenuto effect. When new key information is assigned to the key information storage channel in place of the key information relating to the added musical sound, the sostenuto data relating to the key to which the sostenuto effect should be given is also rewritten. As a result, even if the key to which the sostenuto effect is to be applied is pressed again, the sostenuto data related to the key is set to a value indicating that the sostenuto effect is not applied, and the sostenuto effect is not applied to the musical sound related to the key. Occurs, and the control of the musical sound in such a case is different from that of an actual piano.

The present invention has been devised in view of the above problems, and it is an object of the present invention to propose a musical tone generation control device for an electronic musical instrument, which solves the problems of the conventional device and also the problems of the proposed device.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a structural feature of the present invention is that a keyboard consisting of a plurality of keys (11), an operator (12) for controlling the sostenuto effect, and a keyboard. First storage means (AKC) for storing key information which is composed of a number of storage channels less than the number of keys
R), second storage means (SKCR) for storing a plurality of key information for sostenuto effect control, and a plurality of tone signal forming channels corresponding to the respective storage channels of the first storage means. A tone signal forming circuit (14) for generating tone signals each having a pitch specified in the forming channel and having a controlled decay time, and a key pressed in response to a key press on the keyboard. Key information first
It is stored in any one of a plurality of storage channels of the storage means, and a pitch is designated by the stored key information and designated by a tone signal forming channel corresponding to the storage channel storing the key information. A tone signal having a pitch is generated, and even if the key represented by the key information stored in the second storage means is pressed again, the key information at the time of the previous key press of the plurality of storage channels Is stored in a storage channel different from the storage channel in which the key is stored, and the tone signal corresponding to the different storage channel is specified by storing the key information indicating the key pressed again. Allocation control means (200) capable of generating a musical tone signal of the same specified pitch in the formation channel
To 205,300 to 311) and key information representing a key pressed on the keyboard when the operator is operated and stored in the second memory when the operator releases the operation. When the sostenuto key information storage control means (500 to 502, 600 to 609) for clearing the key information and the key information representing the key released in response to the key release on the keyboard are stored in the second storage means When the tone signal forming circuit is controlled so as to increase the decay time of the tone signal for the released key and the key information representing the released key is not stored in the second storage means, the key is released. And a decay time control means (400 to 409) for controlling the tone signal forming circuit so that the decay time of the tone signal relating to the key is shortened.

(Operation) In the present invention configured as described above, when any key on the keyboard is depressed, the assignment control means responds to the key depression with key information representing the key depressed. In the tone signal forming channel corresponding to the memory channel in which the key information is stored by storing the key information in any one of the plurality of storage channels of the first storage means. Generates a tone signal of the same specified pitch. In this case, even if the key represented by the key information stored in the second storage means is pressed again, the allocation control means stores the key information at the time of the previous key pressing among the plurality of storage channels. In the tone signal forming channel corresponding to the different storage channel, the key information representing the re-pressed key is stored in a storage channel different from the storage channel, and the pitch is specified by the stored key information. It is possible to generate a musical tone signal having the same designated pitch. As a result, in response to the key performance on the keyboard, a tone signal for the depressed key is generated from the tone signal forming circuit. Further, even if the key represented by the key information stored in the second storage means is pressed again, that is, the tone signal having the same pitch as that of the re-pressed key and a long decay time. Even if the key is being generated, a tone signal for the key that has been pressed again is newly generated.

On the other hand, if the control is operated and then released,
The sostenuto key information storage control means stores, in the second storage means, key information representing a key pressed by the keyboard when the operator is operated, and in the second storage means when the operation of the operator is released. Clear the existing key information. Then, when the key which is being pressed by the keyboard is released, the decay time control means, if the key information regarding the released key is stored in the second storage means, the tone signal is generated. The key information related to the released key is secondly controlled by controlling the decay time of the tone signal generated by the forming circuit for the released key.
If not stored in the storage means, the decay time of the tone signal generated by the tone signal forming circuit and related to the released key is controlled to be short. In this way, the control of the decay time is controlled based on the key information stored in the second storage means regardless of the assigning operation related to the key depression, and even when the same key is repeatedly operated on the keyboard. , Even if a key that has already been deallocated is newly pressed,
The sostenuto effect is added to the tone signal related to the key that was pressed when the operator was operated.

(Effect of the Invention) As can be understood from the above description of the operation, according to the present invention, the drawbacks of the conventional device and the proposed device are eliminated, and the sostenuto effect is imparted to an actual piano, and the musical sound of the electronic musical instrument is obtained. The quality of the generation control device is improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 schematically shows an entire electronic musical instrument to which the musical tone generation control device according to the present invention is applied. This electronic musical instrument has a keyboard 11, a sostenuto pedal 12 for selectively controlling the application of a sostenuto effect, a group of other operators 13 for selectively controlling tone color, volume, etc., and a tone signal forming circuit 14 for forming and outputting a tone signal, A keyboard section 11, a sostenuto pedal 12, and a microcomputer section 15 for controlling the tone signal forming circuit 14 by inputting the respective states of the operator group 13 are provided.

The keyboard 11 has a plurality of keys for designating the pitches of the musical tones formed by the musical tone signal forming circuit 14, and a plurality of key switches are provided corresponding to the respective keys to be pressed and released. Is detected by the key switch circuit 11a having a built-in key. The key switch circuit 11a is connected to the microcomputer unit 15 via the bus 16, and is controlled by the computer unit 15 to supply the computer unit 15 with a status signal indicating a key operation state of key depression or key release of each key. It is like this. The sostenuto pedal 12 is operated by the foot of the performer.
It is adapted to be detected by a sostenuto pedal switch circuit 12a having a built-in sostenuto pedal switch that opens and closes in conjunction with 12. The sostenuto pedal switch circuit 12a is connected to the microcomputer unit 15 via the bus 16.
Is connected to the computer section 15 and is controlled by the computer section 15 to supply the computer section 15 with a state signal indicating the operation state of the sostenuto pedal 12. The operation of the other operator group 13 is detected by the other switch circuit 13a having a plurality of switches provided corresponding to each operator. Other switch circuits
The reference numeral 13a is connected to the microcomputer unit 15 via the bus 16 and is controlled by the computer unit 15 to supply the computer unit 15 with a status signal indicating the operating condition of each operator.

The tone signal forming circuit 14 has N (for example, 16 in this embodiment) tone signal forming channels, which is smaller in number than the number of keys of the keyboard 11, and the microcomputer unit 15 is provided via the bus 16.
In the channel designated by, a tone signal is formed and output according to the operating states of the keyboard 11, the sostenuto pedal 12 and the other operator group 13. In this case, the tone color of the musical tone signal designated by the other operator group 13 and formed on each channel is of a piano type, and its envelope signal waveform is, as shown in FIG. It is a percussive system that rises and then decays.
Further, this envelope signal waveform is gradually attenuated as shown by the solid line in FIG. 3 if the key is continuously pressed, but is rapidly attenuated as shown by the broken line in FIG. 2 if the key is released during the attenuation. The tone signal to which the sostenuto effect is added by the sostenuto pedal 12 is gradually attenuated as shown by the solid line in FIG. 2 even after the key is released. In addition, the tone signal forming circuit 14
Each tone signal forming channel therein has a built-in level detection circuit for detecting the level of the envelope signal waveform formed in the channel, and the detection circuit indicates the detection level via the bus 16. The level signal is supplied to the microcomputer unit 15 for the key press assignment control operation in the computer unit 15.

A speaker 18 is connected to the tone signal forming circuit 14 via an amplifier 17, and the speaker 18 produces a tone corresponding to the tone signal supplied from the tone signal forming circuit 14 via the amplifier 17.

The microcomputer unit 15 includes a program memory 15a that stores programs corresponding to the flowcharts shown in FIGS. 4 to 9, a central processing unit (hereinafter referred to as CPU) 15b that executes these programs, and a program memory 15a that stores the programs. A working memory 15c for temporarily storing various data necessary for execution is provided, and by executing the above program, data corresponding to the operation of the keyboard 11, the sostenuto pedal 12 and the other operator group 13 is generated as the tone signal forming circuit 14. To control the generation of the tone signal. The program memory 15a, the CPU 15b, and the working memory 15c are a bus.
16 connected to each.

The working memory 15c is a key code register group AKCR, a key-on register group KONR, a sostenuto register group SKCR, and other allocation control register groups ASCR.
Have. Register key code register group AKCR is 3A
As shown in the figure, it comprises N (16) memory channels corresponding to the N tone signal forming channels of the tone signal forming circuit 14, each memory channel being assigned to each tone signal forming channel. The assign key codes AKC (0), AKC (1), ... AKC (15) representing the keys are stored. As shown in FIG. 3B, the key-on register group KONR consists of the same number of storage channels as the assigned key code register group AKCR, and each storage channel has "1".
Key-on data KON (0), KON (1), which indicates that the key assigned to each tone signal forming channel is being depressed, and that the key is being released by "0".
..KON (15) is memorized respectively. As shown in FIG. 3C, the sostenuto register group SKCR is provided with a memory channel that is equal to or larger than the number of keys that can be simultaneously pressed (for example, 16 in the present embodiment), and all of the keys being pressed when the sostenuto pedal 12 is operated. The information indicating each of the keys, that is, the sostenuto key code SKC representing the key to which the sostenuto effect is to be added is stored.

The other allocation control register group ASCR is an event key code EV that represents the key newly pressed and released on the keyboard 11.
KC, assign channel data ASSCH indicating the tone signal forming channel to which the newly pressed key is to be assigned, and off channel data OFFCH indicating the channel number to which the key released on the keyboard 11 is assigned are stored. .

The operation of the embodiment configured as described above will be described with reference to the flowchart. When a power switch (not shown) is turned on, the CPU 15b starts execution of the main program in step 100 of FIG. 4, and in step 101 all register groups AKCR, KONR, S in the working memory 15c.
After initializing various data by clearing KCR and ASCR, the circulation processing of steps 102 to 104 is executed.

When the key release operation is performed on the keyboard 11 during the circulation processing, a key release event related to the keyboard 11 is detected in step 102, and if the detected event is related to the key press, the key-on program ( (FIG. 5) is executed, and in the case of key release, a key-off program (FIG. 7) is executed. When the sostenuto pedal 12 is operated or released, the step
At 103, an operation event and an operation release event related to the sostenuto pedal 12 are detected. If the detected event is related to the operation, the sostenuto on program (FIG. 8) is executed and the operation is released. In that case, the sostenuto off program (FIG. 9) is executed. Further, when the other operator group 13 is operated, an operation event related to the operator group 13 is detected in step 104, and the control data corresponding to the operated operator is sent to the tone signal forming circuit 14. The tone color, volume, etc. of the musical tone signal output and formed by the circuit 14 are controlled.

Next, referring to the above-mentioned key-on program, key-off program, sostenuto-on program and sostenuto-off program which are executed in response to the operation of the keyboard 11 and the sostenuto pedal 12, the tone generation control operation according to the operation will be described in detail. explain.

(1) Key-on program When a new key-depressing operation is performed on the keyboard 11, the CPU 15b, which is executing the cyclic processing including steps 102 to 104 (FIG. 4) as described above, detects a key-depressing event in step 102. Then, the key-on program (FIG. 5) is executed.

The execution of this key-on program is started in step 200, and the key code KC representing the newly pressed key is set as the event key code EVKC in step 201.
In step 202, the key assign routine is executed.

In this key assign routine, as shown in FIG. 6, its execution is started in step 300, and in step 301, the variable i is increased from "0" to "15" by "1", and the assigned key code is increased. The register group AKCR for use is referred to search the storage channel in the register group AKCR for the assigned key code which stores the same assign key code AKC (i) as the event key code EVKC, and
It is determined whether or not there are two same channels. In this case, if the newly pressed key has already been assigned to two channels, it is determined to be "YES" in step 301 and the tone signal formation corresponding to the searched channel is performed in step 302. Level signals are respectively input from the two tone signal forming channels in the circuit 14, and the magnitude relation between the two level signals is compared, and the channel number of the smaller level signal is assigned to the channel data.
Set as ASSCH. By the setting process of the assign channel data ASSCH, the same key is assigned up to 2 channels, and at the same time, the newly pressed key is already 2
When assigned to a channel, the channel with the lower tone signal level is determined as the assigned channel.

If it is determined in step 301 above that "NO", that is, the number of assigned channels for the newly pressed key is less than 2, the tone signal forming circuit 14 is executed in step 303.
Level signals are respectively input from the respective tone signal forming channels in the above, and the input level signals are "0".
The presence or absence of a channel that is In this case, if there is a channel whose level signal is “0”,
If YES in step 303, step 304
At, the channel number representing the channel whose level signal is "0" is set as the assigned channel data ASSCH. By the setting process of the assign channel data ASSCH, the channel for which sound generation has ended is determined as the assigned channel for a new key depression.

Further, when it is determined in the above step 303 that "NO", that is, the channel whose sound generation has ended, in step 305, the variable i is increased from "0" to "15" by "1", and the assigned key code is increased. Register group AKCR, key-on register group KONR, and sostenuto register group SKCR
Is referred to, the assign key code AKC (i) in the assigned key code register group AKCR is changed to all the sostenuto key codes SKC (0 to 1 in the sostenuto register group SKCR.
The variable i (channel) which does not match 5) and the key-on data KON (i) in the key-on register group KONR is "0" is searched and the presence or absence thereof is determined. In such a case, if the corresponding channel exists, it is determined to be "YES" in step 305, and the levels are output from all the tone signal forming channels in the tone signal forming circuit 14 corresponding to the searched channel in step 306. As each signal is input, the magnitude relationship of these level signals is compared, and the channel number indicating the channel with the smallest level signal is assigned to the channel data ASSC.
Set as H. Such assign channel data A
Due to the SSCH setting process, the channel with the lowest tone signal level among the channels that are generating tones to which the sostenuto effect is not applied and that are related to the released key is the assigned channel for the new key depression. Will be decided as.

If it is determined in step 305 that “NO”, that is, a tone to which the sostenuto effect is not being generated and a tone related to the released key is not present in any channel, the variable i is set to “ The key-on register group KONR is referred to while increasing from "0" to "15" by "1", and the channel to which the released key is assigned is searched and the presence or absence thereof is determined.
In such a case, if the corresponding channel exists, it is determined to be "YES" in the step 307, and the tone signal forming circuit corresponding to the searched channel in the step 308.
Level signals are input from all the tone signal forming channels in 14 and the magnitude relationships of these level signals are compared, and the channel number indicating the channel with the smallest level signal is set as the assigned channel data ASSCH. Such assign channel data ASSC
By the setting process of H, the channel having the lowest tone signal level among the channels generating the tone related to the released key is determined as the assigned channel for the new key depression.

Furthermore, if it is determined in step 307 that "NO", that is, there is no channel that is generating a musical tone related to the released key, in step 309 level signals are output from all the musical tone signal forming channels in the musical tone signal forming circuit 14. Are input, the magnitude relationships of these level signals are compared, and the channel number indicating the channel with the smallest level signal is set as the assigned channel data ASSCH. By the setting process of the assign channel data ASSCH, the channel having the lowest tone signal level among the channels generating the tone of the key being depressed is determined as the assigned channel for the new key depression.

After the processing of the steps 302, 304, 306, 308, 309, the execution of the key assign routine is completed in step 311, and the program proceeds to step 203 of the key-on program (FIG. 5). At step 203, the assign key code AKC (ASSCH) and key-on data KON (ASSCH) designated by the assign channel data ASSCH
Are set to event key codes EVKC and "1", respectively. Next, in step 204, the assign key code AKC (ASSCH) set above is assigned channel data ASSC.
Along with H, they are transferred to the tone signal forming circuit 14 via the bus 16, and the execution of the key-on program is ended in step 205.

In the tone signal forming circuit 14, the tone signal forming channel designated by the assign channel data ASSCH forms a tone signal of the pitch designated by the assign key code AKC (ASSCH), and the signal is formed by a solid line in FIG. A signal with an envelope signal waveform that rises rapidly and is gradually attenuated is output. Then, since this musical tone signal is supplied to the speaker 18 via the amplifier 17, the musical tone corresponding to the musical tone signal is generated from the speaker 18.

(2) Key-off program When the key being pressed on the keyboard 11 is released, the CPU 15b executing the circulation process consisting of steps 102 to 104 (FIG. 4) at step 102 as described above. A key release event is detected and a key off program (FIG. 7) is executed.

Execution of this program begins at step 400,
Key code KC representing the key released in step 401
Is set as the event key code EVKC, and step 40
In step 2, the key i register group KONR and the assigned key code register group AKCR are referenced while increasing the variable i from "0" to "15" by "1".
The key i data KON (i) in KONR is “1”, and the variable i (channel) in the relation that the assign key code AKC (i) in the assigned key code register group AKCR matches the event key code EVKC is searched. To be done. Next, in step 403, it is determined whether or not there is a channel that satisfies the above relationship based on the search result, and when it is determined in step 403 that “NO”, that is, the channel does not exist, the program proceeds to step 409. Then, the execution of the key-off program is completed.

Further, if "YES" in the step 403, that is, if it is determined that the corresponding channel exists, the channel number representing the corresponding channel by the search is set as the off-channel data OFFCH in step 404, and in step 405 the Setting OFF Channel data OFF
The key-on data KON (OFFCH) in the key-on register group KONR specified by CH is set to "0". After the processing in step 405, the sostenuto register group SKCR is referenced while increasing the variable j from "0" to "15" by "1" in step 406, and the register group SKCR matching the event key code EVKC is referenced. Sostenuto key code in
SKC (j) is searched, and in step 407, the presence or absence of the corresponding channel is determined based on the search result.

In such a case, if the corresponding channel does not exist, it is determined to be "NO" in the same step 407, and the off-channel data OFFCH and the control data representing the rapid attenuation are sent to the tone signal forming circuit 14 via the bus 16 in step 408. Is output to.
As a result, the tone signal forming circuit 14 rapidly attenuates the tone signal being formed and output in the tone signal forming channel designated by the off-channel data OFFCH (second).
(See the broken line in the figure), the musical sound corresponding to the channel generated from the speaker 18 is rapidly attenuated. It should be noted that such an operation corresponds to the attenuation control of the musical sound after the key is released when the sostenuto effect is not applied.

If there is a corresponding channel in the search process of step 406, it is determined to be "YES" in the determination process of step 407, the program proceeds to step 409, and the execution of the key-off program ends in step 409. To be done. As a result, in such a case, since the decay processing in step 408 is not performed, the decay time of the generated musical sound remains set long based on the control in the processing in step 204 of the key-on program (FIG. 5) described above. Yes (see the solid line in FIG. 2). It should be noted that such an operation corresponds to the attenuation control of the musical sound after the key is released when the sostenuto effect is applied.

(3) Sostenuto On Program When the sostenuto pedal 12 is operated, the CPU 15b, which is executing the circulation process including steps 102 to 104 (FIG. 4) as described above, executes the sostenuto pedal 1 at step 103.
The operation event of 2 is detected and the sostenuto on program (Fig. 8) is executed.

Execution of this program begins at step 500,
In step 501, the variable i is set to "1" from "0" to "15".
Each time the key-on register group KONR is referenced, the channel for which the key-on data KON (i) in the register group KONR is “1” is searched, and a variable indicating the same channel is found each time the corresponding channel is found. The assigned key code AKC (i) in the assigned key code register group AKCR designated by i is the sostenuto register group S
It is set as the sostenuto key code SKC (i) in KCR. As a result, the sostenuto register group SKCR stores all the key codes KC representing keys that are being depressed when the sostenuto pedal 12 is operated. After the processing of step 501, execution of the sostenuto-on program is ended in step 502.

(4) Sostenuto Off Program When the operation of the sostenuto pedal 12 is released during operation, the CPU 15b, which is executing the circulation process including steps 102 to 104 (FIG. 4) as described above, executes the sostenuto at step 103. When the operation release event of the pedal 12 is detected, the sostenuto off program (FIG. 9) is executed.

The execution of this program starts at step 600,
In step 601, the variable j is initialized to "0", and in step 602, the sostenuto key code SKC (j) in the sostenuto register group SKCR designated by the setting variable j is "0" (each key It is determined whether or not it is reset data which does not represent In this case, if the sostenuto key code SKC (j) is "0", it is determined to be "YES" in step 602, and the program proceeds to step 607. Also, sostenuto key code SKC
If (j) is not “0”, then in step 602, “N
If "O" is determined, the program proceeds to steps 603 to 606.

In step 603, the variable i is changed from "0" to "15".
Key-on register group KO while increasing by 1 each
The key-on data KON in the key-on register group KONR is referenced by referring to NR and the assigned key code register group AKCR.
(I) is "0" and assigned key code register group
The variable i in which the assign key code AKC (i) in the AKCR matches the sostenuto key code SKC (j)
(Channel) is searched. Next, in step 604, it is determined whether there is a channel that satisfies the relationship based on the search result, and when it is determined in step 604 that “YES”, that is, the corresponding channel is present, step
At step 605, similar to the processing at step 408 (FIG. 7), control is performed so that the musical tones on all relevant channels are rapidly attenuated, and at step 606, the sostenuto key code SKC (j) is set to "0". Is set to. The processing of step 605 has the meaning of rapidly attenuating the musical sound to which the sostenuto effect has been applied after the key is released due to the operation of the sostenuto pedal 12, by canceling the same effect when the pedal 12 is released.

If it is determined to be "NO" in step 604, that is, the corresponding channel does not exist, the process of step 605 is not performed, and the program proceeds to step 606, in which the sostenuto key code S
KC (j) is set to "0". In such a case, since there is no musical sound to which the sostenuto effect has been applied after the key is released, the rapid attenuation control as described above is unnecessary.

After the processing of step 606, "1" is added to the variable j in step 607, and it is determined in step 608 whether the variable j increased by "1" by the addition is less than "16". To be done. In this case, if the variable j is less than "16", it is determined to be "YES" in the step 608, the program is returned to the step 602, and the steps 602 to 606 are performed.
The variable j is incremented by "1" again in step 607 while the process consisting of is executed. Such a variable j
When the same variable changes to "15" due to the increase of, the rapid damping control and the clearing process of the sostenuto key code SKC including the steps 602 to 606 for all the sostenuto key codes SKC in the sostenuto register group SKCR are ended. Then, when "1" is added to the variable j again in step 607, the variable j becomes "16", it is determined to be "NO" in step 608, and the sostenuto off program is executed in step 609. Is ended.

As can be understood from the above description of the operation, according to the above-described embodiment, when the sostenuto pedal 12 is operated, all the keys being pressed on the keyboard 11 by the processing of step 501 of the sostenuto on program (FIG. 8) are operated. The represented key code KC is taken into the sostenuto register group SKCR as the sostenuto key code SKC, and at the time of releasing the key being pressed on the keyboard 11, the step 40 of the key-off program (FIG. 7) is performed.
By the processing of 3 to 408, since the attenuation characteristic of the musical tone regarding the released key, that is, the impartation of the sostenuto effect is controlled according to the sostenuto key code SKC, the key depression event on the keyboard and the assignment operation regarding the key depression are Regardless of the key release, the sound attenuation characteristics are controlled when the keys are released, regardless of whether the same key is repeatedly operated on the keyboard, or when an already unassigned key is newly pressed. , The sostenuto effect is added to the musical sound related to the key that was pressed when the operator was operated.

The present invention can be realized even if the above embodiment is modified as follows.

(1) In the above embodiment, the storage channel for the sostenuto key code SKC is provided in the sostenuto register group SKCR in association with each storage channel in the assigned key code register group AKCR and the key-on register group KONR. However, the sostenuto register group SK
It suffices that the CR has a function of storing the key code KC representing all the keys being pressed on the keyboard 11 when the sostenuto pedal 12 is operated. Sostenuto key code SK
It is not necessary to provide a memory channel for C in association with each memory channel in the assigned key code register group AKCR and key-on register group KONR, and assign the memory channel for the sostenuto key code SKC to the assign key code AKC and key-on. It is not necessary to provide the same number as the number of channels that store the data KON. For example, "10"
The number may be about the same.

Further, since the sostenuto register group SKCR has only to store data representing all the keys being pressed on the keyboard 11 when the sostenuto pedal 12 is operated, the sostenuto register group SKCR can be stored.
Instead of the CR, a register having a bit number corresponding to each bit of the keys of the keyboard 11 may be provided. In this case, when the sostenuto pedal 12 is operated, the data of each bit corresponding to the key being pressed on the keyboard 11 is set to "1" representing the sostenuto effect addition, and
When the operation of the pedal 12 is released, all the data set to "1" may be set to "0" indicating that the sostenuto effect is not applied. Then, in step 406 of FIG.
The search process may be performed according to each bit data in the register.

(2) In the above embodiment, in order to control the application of the sostenuto effect, when the key of the keyboard 11 is released, the key code KC (event) related to the key released in the processing of steps 406 to 408 in FIG. It is determined whether or not the key code EVKC) exists in the sostenuto register group SKCR, and the attenuation characteristic of the musical sound is controlled based on the determination result. However, instead of this, as in the above-mentioned proposed device, the flag data indicating the presence or absence of the sostenuto effect is stored in association with the assign key code AKC in the assigned key code register group AKCR, and the key code KC At the time of allocation control, the sostenuto register group SKCR is referred to so that the flag data is set and controlled.
At the time of releasing the key in (1), the attenuation characteristic of the musical sound relating to the released key may be controlled according to the flag data.

(3) In the above embodiment, in order to determine the assigned channel when a new key is pressed on the keyboard 11, the tone signal forming circuit 14 sends a level signal representing the tone signal level to the microcomputer unit 15. Although the level signal is fetched, instead of fetching the level signal, the level may be estimated for each channel in the microcomputer unit 15 according to the lapse of time from the key depression.
In this case, if a key touch function corresponding to the key pressing speed, a damper function according to the operation of the damper pedal, and the like are provided, the estimated level is corrected according to the function according to the key touch and the operation of the damper pedal. You can do it like this. Further, the allocation priority order may be simply determined based on, for example, the key release order, without using the above-described allocation order determination condition.

Further, in relation to the assignment, in the above-mentioned embodiment, the assignment priority order is changed by the processing of steps 305 and 307 in FIG. 6 depending on whether or not the sostenuto effect is applied and the key release key. Without considering the conditions, that is, by omitting the processing of steps 305 to 308,
If it is determined to be "NO" in step S309, only the processing of step 309 may be executed to determine the allocation priority order based only on the level of the musical sound. Conversely, the pitch of the generated musical tone may be taken into consideration, for example, a new key may not be easily reassigned to a channel to which a key belonging to the low temperature range is assigned.

(4) In the above embodiment, the number of channels that can simultaneously generate musical tones is "16", but this number may be any other number as long as it is plural. Further, in the above embodiment, the maximum number of channels capable of simultaneously producing musical tones for the same key is "2", but the maximum number of channels may be "1" or may be "3" or more.

[Brief description of drawings]

1 is an overall schematic view of an electronic musical instrument to which a musical tone generation control apparatus according to an embodiment of the present invention is applied, FIG. 2 is an envelope signal waveform diagram of a musical tone signal generated by the electronic musical instrument of FIG. FIGS. 3A to 3D are memory maps of the working memory of FIG. 1, and FIGS. 4 to 9 are flowcharts corresponding to the programs stored in the program memory of FIG. Explanation of symbols 11 ... keyboard, 11a ... key switch circuit, 12 ... sostenuto pedal, 12a ... sostenuto pedal switch circuit, 14 ... music signal forming circuit, 15 ... microcomputer section, 15a ... program memory, 15b ... CPU, 15c ...
Working memory, AKCR ... Allocation key code register group, KONR ... Key-on register group, SKCR ... Sostenuto register group, ASCR ... Other allocation control register group.

Claims (1)

(57) [Claims] 1. Key information comprising a key consisting of a plurality of keys, an operator for controlling the sostenuto effect, and a memory channel of a number smaller than the number of keys of the keyboard, and representing key pressed on each memory channel. And a second storage means for storing a plurality of key information for sostenuto effect control, and a plurality of tone signal forming channels respectively corresponding to the respective storage channels of the first storage means. And a tone signal forming circuit for generating a tone signal having a designated pitch in each tone signal forming channel and having a controlled decay time, and the key is depressed in response to the key depression on the keyboard. Key information representing a key is stored in any one of the plurality of storage channels of the first storage means, and a pitch is designated by the stored key information to store the key information. A tone signal having the same designated pitch is generated in the tone signal forming channel corresponding to the storage channel, and the key represented by the key information stored in the second storage means is pressed again. Of the plurality of storage channels, the key information representing the key re-depressed is stored in a storage channel different from the storage channel storing the key information at the time of the previous key depression, and the stored key information is also stored. Assignment control means capable of generating a tone signal of the specified tone pitch on a tone signal forming channel corresponding to the different storage channel by pressing the keyboard when the operator is operated. Sostenuto key information for storing key information representing a key that is locked in the second storage means and clearing the key information stored in the second storage means when the operation of the operator is released. When the memory control means and the key information representing the key released in response to the key release on the keyboard are stored in the second storage means, the decay time of the tone signal relating to the released key is lengthened. When the key information representing the released key is not stored in the second storage means, the decay time of the tone signal related to the released key is shortened. And an attenuation time control means for controlling the tone signal forming circuit.