JP2730721B2 - Electronic musical instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic musical instruments, and more particularly to realizing an effective sustain effect. 2. Description of the Related Art In recent years, many electronic musical instruments having a sustain effect have been commercialized as represented by electronic pianos. As a conventional technique, for example, an envelope is changed by turning on / off a sustain pedal. Hereinafter, an example of a conventional electronic musical instrument will be described with reference to FIG. In FIG. 2, reference numeral 11 denotes a keyboard having a plurality of keys for designating the pitch of a musical tone, and 12 denotes a sustain pedal having an internal switch.
The pedal 12 is used by a player to obtain a sustain effect by operating the pedal. The keyboard 11 and the sustain pedal 12 each have a CPU as control information generating means.
(Central processing unit) 13. The CPU 13 detects a key pressed on the keyboard 11 and outputs a key code KC indicating the pressed key and a key-on signal KON indicating whether or not the pressed key is connected, and simultaneously responds to the operation of the sustain pedal 12. To output the sustain-on signal SON. 14 is the key code KC and key-on signal K from the CPU 13.
This is a tone generator that takes in ON and sustain-on signals SON and generates tone signals (analog signals), and is connected to the CPU 13. A sound system 15 connected to the tone generator 14 takes in a tone signal from the tone generator 14, amplifies the signal, and drives a speaker 16. FIG. 3 shows the envelope of the tone signal from the tone generator 14 corresponding to the key-on signal KON and the sustain-on signal SON.
An example of E1 and E2 is shown. For example, the sustain-on signal SON
When the key-on signal KON changes from OFF → ON → OFF (KON = 0 → 1 → 0) when is OFF (SON = 0), the envelope of the tone signal becomes like E1. When the sustain-on signal SON is on (SON = 1), the key-on signal KON
Is changed from OFF → ON → OFF (KON = 0 → 1 → 0), the envelope of the tone signal becomes like E2. The duration of the decay envelope after the key release (KON = 1 → 0) is much longer in the envelope E2 of the tone signal than in the envelope E1 of the tone signal. That is,
A tone signal having characteristics such as the envelope E2 of the tone signal is generated with a long lingering sound even after key release, and a sustain effect is obtained. Problems to be Solved by the Invention However, in the above-described configuration, the only effect of the sustain effect is to lengthen the envelope signal of the musical tone signal after key release and to add lingering sound. When considering the sustain effect of a piano as an example of the sustain effect, a sustain effect such as a reverberation effect in which a sound produced by a keystroke, which is an important element of the sustain effect, resonates inside the piano body, cannot be obtained. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide an electronic musical instrument capable of obtaining a more natural sustain effect such that the musical instrument resonates inside the main body. Means for solving the problem Control information generating means for generating key depression / release information of the keyboard and on / off information of the sustain pedal, and the key depression / release information and on / off information of the sustain pedal There are provided an envelope changing means for changing the envelope shape of the musical sound signal in response to the change, and a reverberation adding means for controlling the amount of reverberation effect in accordance with the on / off information of the sustain pedal. Control information generating means for generating key depression / release information of the keyboard, key depression number information, and sustain pedal on / off information; and a control information generating means responsive to the key depression / key release information and the sustain pedal on / off information. Envelope changing means for changing the envelope shape of the musical tone signal, and reverberation adding means for controlling the amount of reverberation added in accordance with the keystroke number information and on / off information of the sustain pedal. Operation According to the above configuration, the amount of reverberation effect according to the control information of the control information generating means is added to not only the key depression but also all the tones after the key release, and as a result, a more natural depth Reverberation effect is obtained. An electronic musical instrument according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an electrical block diagram of an electronic musical instrument showing one embodiment of the present invention. In FIG. 1, 1 is a 88 key keyboard,
2 is a sustain pedal, 3 is a CPU, 4 is a tone generator, 5 is a sound system, and 6 is a speaker, which are the same as those shown in FIG. 7 is a tone generator 4
The reverberation adding device connected to the
The reverberation amount (addition amount of reverberation effect) is controlled by SVOL.
The reverberation amount is variable between 0 (no reverberation) and 88 (maximum value). The sound system 5 takes in the output of the reverberation adding device 7 and drives the speaker 6. The operation of the electronic musical instrument configured as described above will be described below. Operation until a tone signal (analog signal) is generated from the tone generator 4 and a key-on signal KO
N, the sustain-on signal SON and the envelopes E1 and E2 of the tone signal from the tone generator 4 are as described with reference to FIGS. When the sustain pedal 2 is off, the CPU 3 outputs data corresponding to the number of depressed keys as the reverberation control signal SVOL. When Sustain Pedal 2 is on,
The maximum value (SVOL = 88) is output regardless of the number of key presses. The reverberation adding device 7 adds reverberation to the tone signal from the tone generator 4 in accordance with the reverberation control signal SVOL. That is, the tone signal from the reverberation adding device 7 which is the final output is
When the sustain pedal 2 is off, reverberation proportional to the number of keys pressed is added.
When is turned on, the envelope will be like E2, and at the same time, the maximum reverberation will be added to all the rhymes after key release as well as during key depression. As described above, at the time of sustain on, the reverberation adding device 7 can obtain a more natural high-quality sustain effect on all rhymes during and after key release. Furthermore, even when Sustain is off, acoustic reverberation with a depth proportional to the number of keys pressed can be obtained.
Natural sound quality very close to a piano can be obtained. Furthermore, by setting the degree of addition of the reverberation adding device 7 variously, it is possible to obtain an optimal sustain effect for the reverberation characteristics in the room where the musical instrument is played. Note that the amount of reverberation added is not limited to the above example, and can be set variously. In the embodiment, the reverberation adding device 7 may be a device for adding a reverberation sound to an analog signal, for example, a spring type reverb device or a delay device using a BBD delay element. After receiving the musical sound data (digital signal) and digitally adding reverberation using a digital filter and delay circuit,
A conversion method may be used. In the embodiment, the CPU 3 detects a key pressed on the keyboard 1, but the CPU 3 may receive key press data (digital), or the CPU 3 may receive key press data (digital) from outside the main body. You may. In the embodiment, the CPU 3 detects whether or not the sustain pedal 2 has selected the sustain effect. However, the CPU 3 may receive sustain on / off information from outside the main body. Effect of the Invention As described above, according to the present invention, the reverberation adding device is provided to add the amount of reverberation effect according to the control information of the control information generating means. A high quality sustaining effect can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an electrical block diagram of an electronic musical instrument showing one embodiment of the present invention, FIG. 2 is an electrical block diagram showing an example of a conventional electronic musical instrument, and FIG. FIG. 4 is a diagram illustrating a relationship among a signal, a sustain pedal signal, and an envelope of a musical sound signal. 1 ... keyboard, 2 ... sustain pedal, 3 ... CPU
(Control information generating device), 4... Musical tone generating device, 7... Reverberation adding device, KC... Key code, KON... Key-on signal, SON... Sustain-on signal, SVOL.

   ────────────────────────────────────────────────── ─── Continuation of front page    (56) References JP-A-60-68388 (JP, A)                 JP-A-61-289392 (JP, A)                 Shokai Sho 57-182794 (JP, U)

Claims (1)

(57) [Claims] Key press / release information and sustain pedal on / off
Control information generating means for generating off information;
Envelope changing means for changing the envelope shape of a tone signal in accordance with key release information and on / off information of the sustain pedal, and reverberation adding means for controlling an amount of reverberation effect in accordance with the on / off information of the sustain pedal Electronic musical instrument with. 2. Control information generating means for generating key depression / key release information, key depression number information, and sustain pedal on / off information of the keyboard; and a tone corresponding to the key depression / key release information and the sustain pedal on / off information. An electronic musical instrument comprising: envelope changing means for changing an envelope shape of a signal; and reverberation adding means for controlling an amount of reverberation effect in accordance with the keystroke number information and on / off information of the sustain pedal.