JPS59109092A - Sustain effect controller for electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

This invention relates to electronic equipment, and allows the sustain effect to be controlled. Generally, in electronic musical instruments, in order to generate a sound similar to the musical tone of a natural musical instrument, the width envelope shown in Figure 1 CB) or Figure 1 C) is applied to the musical sound signal (=
It is designed to give 1. The envelope waveform shown in Figure 1 (B) is given when generating a musical sound similar to a sustained tone natural instrument such as an organ, flute, violin, etc. When a key on the keyboard is pressed at time t1, 4
) When the key-on signal K ON rises, the attack waveform portion W1 causes the wave shadow portion W to rise rapidly.
2 through the attack waveform @, wi peak level I, A
(This is called the attack level) A continuous waveform section W3 with a sustaining level LS slightly lower than K moves, and then at time t
When the key is pressed at 2, the release waveform fl1'4 slowly returns to the O level. Furthermore, the envelope waveform in Figure 1 (C) is given when generating a strip similar to a piano/harpsichord (VCM), which is a natural system analogy for attenuated sounds. It has a configuration in which the envelope waveform does not have a continuous waveform portion W3. By the way, in the musical tones of natural musical instruments, the temporal length of the release waveform portion W4 (called the sustain length) is not uniform for valley instruments. Incidentally, each natural instrument has its own characteristics in the way the sound and electricity change until the generated musical tone attenuates and disappears (this is called the sustain effect). It is necessary to create a sustain similar to the sustain effect of the corresponding natural musical instrument, and if you do not do it this way, there will be disadvantages such as unnaturalness and force. Here, when using the envelope waveform of the burnt sound string shown in Fig.
From the time t2) when IJ falls, the IJ waveform part W4
It is an effect that decreases to the O level. Furthermore, when using the envelope waveform of the attenuated sound string shown in FIG.
This refers to the effect of improving one's ability to imitate oneself up to the O level. Therefore, in electronic musical instruments, in order to add sustain effects corresponding to each tone to the musical tone when playing a musical instrument, a sustain system with the configuration shown in Figure 2 is used. 111 circuit 1 was used. 1- That is, the key-on signal K (JN (in this case, when a key is pressed, it falls from 0 level to a negative level and then returns to θ level at tk tll + 1) generated in the linear circuit 2 is connected to the capacitor 3 and i). Sustain control consisting of 4 parallel circuits: When the key-on signal KON falls to a negative level in response to the circuit IK, the capacitor 3 is charged with a negative voltage and maintained as it is, and when the key-on signal KON returns to the 0 level. By radiating the optical voltage of the capacitor 30 along the variable resistor 4, an envelope signal ES is sent out which corresponds to the release waveform part W4 determined by the release time constant.This envelope signal ES
is given to the opening/opening circuit 6 which controls the depth of the musical tone signal 1vIS sent out from the tone source circuit 5, and thus the entertainment signal M
Add a wide envelope with sustain to S.

[
Send to tone circuit. In practice, the variable resistor 4 of the sustain control circuit 1 is installed in parallel with the keyboard, and when the performer selects a tone, the sustain major key lever 7, which moves slowly, can be operated by the operator of the variable resistor 4. It is possible to generate a sustain length of (for example, a sustain length that does not cause any unnaturalness). Incidentally, as shown in FIG. 3, the sustain length adjustment lever 7 is used to set the standard sustain length.
N (JRlvIAL Set the J scale position and the sustain length to twice the reference length [+6 dBJ position & set the sustain length to one time and one time the reference length VCBy 1-64 aBJ, l-+zaBJ A configuration in which the scale position can be slid according to the necessity can be applied. According to such a conventional configuration, in addition to selecting the tone, the sustain major key glaze lever 7 can be operated according to the player's preference. By doing this, you have the freedom to set the sustain length at will, but on the other hand, if you change the timbre of a musical note, you have to operate the sustain major lever 7 and adjust the resistance value of the variable resistor 4 each time. This invention was made in consideration of the above points, and it is possible to automatically set a standard sustain length when an Italian player selects a Chestnut tone, and also to adjust this setting value. This is an attempt to effectively solve the problems of the conventional art by enabling a performer to immediately receive a copy of the envelope signal generator. , in an electronic musical instrument having the configuration shown in FIG. A key code signal KC, which is detected by the detection circuit 15 and represents the pressed key, is given to the musical tone signal generating circuit 12. The musical tone (m number generating circuit 12 has a tone part corresponding to the key code signal KC, and also has a tone part corresponding to the key code signal KC. The envelope tsukuda number generator 11 receives the timbre selection signal TC sent from the selection circuit 16 and generates the musical tone 1g having the corresponding timbre. At the same time, each g parameter of the envelope waveform (
The attack level, duration level, attack time, release time, etc.) are determined. In this way, the envelope signal VL generated by the envelope signal generator 11 adds an envelope to the musical tone signal generated in the musical tone signal generating circuit 12, and the musical tone signal TS to which this envelope is applied is converted into a musical tone in the sound system 17. . In this embodiment, the envelope signal generating device 11 includes an envelope signal forming section 21 that forms an envelope signal VL by calculating a change (if) with respect to the presence value of the envelope signal, as shown in FIG. y
I would like to pay my respects to the own nose timing recording section, which decides the timing of the i-collection, and the Mepensen Kazuashi section, which sets the target 1st shift that is recorded in the calculation. In the envelope signal formation 1% 21, the attack waveform part W1 rises exponentially due to the reward operation of the digital arithmetic circuit part, as described above with reference to FIG. It is possible to generate an envelope signal VL such that Nl falls linearly. 7 - The arithmetic circuit section receives the envelope signal VL as boundary value data and receives one input] AK, and also changes the envelope signal VL as boundary value data.
Q■D is received at the other input terminal B, and an envelope signal VL is generated according to the content of the input signal Ut+. The change value data signal VD is added or calculated, and the result of the operation is sent to the shift register (stage 9) as an envelope signal VL in the form of a 9-bit parallel digital signal, for example.
26. The envelope signal VL is fed back to the input terminal AK of the arithmetic circuit section as described above, and is also fed back to the input terminal AK of the calculation circuit section, for example,
The bit is applied to the change value switching circuit 27 as a judgment data signal CT. This change value switching circuit 27 uses a judgment data signal CTO in the form of a 3-bit parallel digital signal.
'0UUJ, l 0OIJ. 1'0]OJ, r01]J...November 1 (
In other words, I (JJ, I'll, I' in decimal imitation)
ll, +3J...17") to I1m step and for each bamboo, 8 outputs 10, tl, L
2, t3... Output the change value instruction to tl to 111
The change value data corresponding to the change value specified outputs generated on these output lines tO, tl, t2, t3...tl are changed to the change value data 9-.
The okara generation circuit is designed to generate okara. Change value data generation circuit 4 is, for example, change 11 own data J]
J, 12J, +4J, 18J
, 116J, +32J. It is composed of a ROM that memorizes the output lines tO, Ll, t2, t3...tl, and when a specified output is obtained on the output lines tO, Ll, t2, t3...tl, a change effect is determined according to the state specified by the state signal ST. A change value data cleaning VD containing data is applied to the input end B of the arithmetic circuit δ via the gate circuit 29. Here, the state signal ST is generated in a state control circuit (equipment). In State Detective 1-1 Road 30, the continuous E tone is selected by the change selection signal TC.
As shown in FIG. 1 (6), the state signal ST is set to attack waveform 114W2 (state 811) while forming the attack slope portion Wl, and then the decay waveform 114W2 (state 811)
Then, the state signal ST is set to the decay-sustaining state S1 while forming the continuous waveform MW3 (state 512), and then the state signal ST is set to the release state S2 while forming the release waveform part W4, and the other standby state 1 ' is the samurai state S3. At the same time, the state control 1 low path 30 recognizes the gate control signal 5LIS at the timing when it enters the sustaining state 812 forming the sustaining drum-shaped portion w3 among the standby state S3 and the holding state 8J. , 70 scissors, respectively attack state SO and release state) At the timing of entering S2, gate system 'o' @ No. SUS is set to logic 10. Furthermore, state side tilt (b) Michiba is attack state S
When O, the content of the one-legged toe signal LJDO is added, and the D1K sustain stay) BL and release stay) S2 and @&'14. Make it. Furthermore, the state control circuit leg enters the attack state SoK from the attack state S3.
Sends reset signal R8 at timing. On the other hand, when an attenuated tone tone is specified by the all-color selection signal TC, the state control circuit 3o jumps to the sustaining state S12'e and releases it when the sustaining state state SI is completed. By setting to state S2, an envelope waveform (FIG. 1(C)) that does not have the continuous hourglass portion W3 is formed. Change 1■ The theta generation circuit 28 outputs outputs to, tl, t2, t3, . . ., L7, respectively, when state 1 δ ST specifies attack state SO.
Each time a direct specified output occurs, the numbers shown in Figure 16 are 1-t]4j, 1-1 in 10 base, respectively.
)4J, ``;(2J, r16J...l
-1, 1 as change value data signal Vl)
occurs. Further, when the state signal ST specifies the decay state S, a change value data signal VD with "1" as the change value data is generated, and the state signal S is similarly generated.
"1" when T specifies release state S2 and standby state S3. A change value data signal VD with a change value of "10" and a change value of 1- is generated. This change value data signal VD is supplied to the calculation timing setting section 2.
The signal is applied to the arithmetic circuit through the gate tPl, which is gated by the arithmetic timing pulse signal CI generated at the gate 2 and obtained through the AND gate 31. Here, the AND gate 31 is configured so that the gate control signal SO8 generated in the state control circuit (equipment) is connected to the inverter 32.
When the gate control signal SUS becomes logic "1" in the sustain state S12 and the standby state, the AND gate 31 operates in a silent manner and blocks the passage of the tfi-calculated timing pulse signal CL. The change value data (v1) is not supplied to the coffee circuit 5. In addition, the sashisanshi j path 5 indicates the change in the change value data signal VD with respect to the marginal value data of the envelope signal VL when the content of the sashimi finger position signal (JD specifies an increasing operation). Value data is added, and conversely, when subtraction operation is specified, subtraction is performed.Thus, in the state where state signal 8T specifies attack state (SO), addition operation is specified by operation designation signal LID. As a result, the content of the judgment data signal CT becomes “000” and [Ut)IJ
, "0IOj, I'011J... II
IIJ (1-OJ, rlJ, r2J in decimal
, Il'' ... ``7''), and therefore the contents of the entire 9-bit envelope signal VL are 1-0'' to 163J, l'6 as shown in FIG.
4J~f'127J, l-128J~l-191J
, [192J ~ [255J...] [44
8J to 1'5] When passing through the area of IJ, change value data rb4J, 1-32. J, [6J...
・・・・・・ "1" is added every time the calculation timing pulse signal CL is given to the gate circuit 4, and as a result, the value of the envelope signal VL becomes almost constant as the number of calculations increases as shown in Figure @7. It will rise exponentially. In addition, the arithmetic circuit unit specifies the subtraction operation by the state signal ST (in a state in which the state signal ST is de1key-mochi-sa-sta) 81 or the release state S2 (in the state in which it is added, the sum signal Ul). Every time the timing pulse signal CL is given to the gate circuit 29. As a result, the envelope signal VL is decreased linearly.Furthermore, the cover circuit 25 detects that the state signal ST is in the dig 1-
When the gate circuit 4 closes based on the signal SO8 in a state in which the sustain state S] or the standby state S3 is specified, the envelope signal VL is set to a constant sustain level L.
Maintain at S or 0 level. Further, the envelope signal VL is compared with the target 11 white data TG sent from the target value setting s23 in the comparator circuit, and the state control circuit 1 is operated by the output CN of the comparison circuit (b). In this case, the expected value setting section has the following configuration for sending out the final value that the envelope signal VL should reach for each state as the expected value data signal TG. The attack level signal generation circuit 3 consists of an attack level memory composed of 1toivi that stores attack level data determined for each tone, and a color selection signal T.
The attack level data specified by CK is read out and applied to the selector 36 as an attack level signal TL. Further, the sustain level signal generation circuit 37 is a sustain level memory composed of a ROM that NC stores the sustain level data determined for each tone, and the sustain level data specified by the tone selection signal TC escapes to the sustain level. Signal S
Give it to selector A as L. The selector 36 receives the state signal ST from the state control circuit and selects the sustain level 4@SL when the state is in the sustained state S1.
At this time, the attack level signal TL is selected and the selected output signal is given to the comparison circuit as the target signal TG. Thus, the envelope signal VL at SU
is the existence of the target value signal TG (attack level signal TI,)
When it matches, the comparator circuit Okara coincidence No. 100 CN is sent out, which is detected by the state sub-side 1 round circuit (equipment) and the state signal S'r is transferred from the attack state SO to the de 1 - Switch to the holding state S1. In addition, in this de-sustaining state state 5IVc, the envelope signal Vl is the internal state of the eye startle value signal TG (sustaining level 4 @ No. 8L
), the comparator circuit 33 sends out the coincidence number 6 CN, and the state control circuit detects this and sets the SUS of each gate splitter 1 to "1" to maintain the state. Switch to S12. The gate circuit 29 is supplied with a deletion timing pulse signal C1 generated in the clearing timing section 4 through an AND gate 31. The m4 timing setting section sends a rate memory 41 that determines the calculation speed in accordance with the timbre. Rate memo 1J4H! Data representing the calculation speed of each state part that makes up the envelope signal for each color *[-! It is composed of the remembered B U iVl,
The color of the color currently being selected is determined by the color selection circuit 16 (Fig. 4) and the state signal ST provided from the state control circuit. Chitake Yasufu rate data compared to state a
This reference rate data signal TR is determined as 1-0.
is added to the manually set sustain length signal MD and the key scaling signal KD in the adding circuit 42 and the key scaling signal KD, and the addition result is given to the calculator 1 mink control circuit 44 as the rate data signal RD. In this embodiment, the rate data signal RJ) is expressed in decimal notation as shown in FIG.
” to “13”, and divides the frequency of the performance timing control circuit 44 & The calculation timing pulse signal CL' becomes twice as long (therefore, the pigeon period becomes shorter by 1.7 times).
a' occurs. #j:1ik-, attack waveform portion W1'f in attack state SO! For example, the calculation time required to form
As shown in the figure, the rate data signal RD changes from "13" to "0".
”, the number decreases from 5 (:ns) to 4 accordingly.
Similarly, in order to form the release drum-shaped part W4 in the release stay 1-82, the length of the release stay 1-82 is increased by twice as long until 0.9[S]. From 164 [S] the trench becomes twice as long and becomes bamboo. In addition, the attack time and IJ IJ− illustrated in FIG.
The time shown here is the value when full scale of all IIJ is specified as attack level 1'L. The manually set sustain length signal MD is generated in the manually set sustain length signal generation circuit 45 in accordance with the adjustment position of the sustain length adjustment lever 7 described above with reference to FIG. In this embodiment, from the code signal generator which is moved by the sustain length adjustment lever 7, the adjustment position of the sustain length adjustment lever 7 is r+6dBJ', lN0RI.
VIALJ, l”-6dBJ = l-12d
L(J KLvjite1-ou J, rloJ
, l''()l J. A null sustain length signal SD is given to the sustain length memory 46 as a 2-bit code signal that changes like "11". This sustain length memory 46 stores I'i of the fixed signal SD, respectively 1-ouJ, [IOJ, ``OIJ''.
. [11JK Gen Yami/decimal "-1", [0]
. It is a ROM that stores the sustain length setting data of r+LJ and l+2J, and the data successively outputted by the finger rectangle signal SD is released into the release state S by the state signal ST.
The gate circuit 47, which opens when the voltage becomes 2, is used as a manually set sustain length signal Ml) to operate the FJO odor circuit 4.
2 is sent out. Therefore, the sustain length adjustment lever 7 is at the adjustment position r+6d.
BJ, IN (JRMALJ, r--6dBJ
, 1-12 dBJ[Nf, the adder circuit 42K[-1J
, I.O.J. 1-+IJ, ``+2J set IwI Stinchocho MD is given, and at this time, from the rate memory 41, the ``Release wave being issued'' Sugibe W4
r-IJ to the value of the reference rate data signal 1゛R for
. ru-1, r+1'', l+2J. The output Al) will be given to the connection point, -l path center. Further, the key scaling signal KD is generated in the key scaling signal generating circuit 49 in response to the timbre selection signal TC. The key scaling signal generation circuit 49 is configured such that the rate of acupuncture of the envelope of chestnuts generated in natural musical instruments tends to rise in accordance with this, and that the degree of rise varies with This is to adjust the yn speed of the envelope according to the selected timbre in response to differences in musical instruments.・Scaling coefficient memory 5Q that stores coefficient data representing the degree of rise for each timbre. Then, nU' of 10, the stored data is read out by the timbre selection No. 18 TC and sent to the multiplication circuit 5 as coefficient data KS.
Give to 1. The multiplication (b) path 51 has a key code signal KC.
is given, and its multiplication output is the key scaling signal KD
The signal is applied to the adder circuit 43 as a signal. In this embodiment, the scaling coefficient memo IJ 50 sends out a coefficient data signal KS of a small value when the timbre selection signal TC specifies -f Tomoe of the string, thereby causing the key code as shown in FIG. When the signal KC becomes thicker (the tone part of the musical tone becomes thicker), the key scaling signal Kl) is hardly changed in response. When the selected timbre Izawa Id No. TC specifies the timbre of piano, flute, or kitar, respectively, it sends out coefficient data signals KS of medium and large values. As the key code signal KC becomes larger (the pitch of the musical tone becomes higher) as shown in (O), the key scaling signal KD is changed to a medium level and thicker to ζ. In fact, the key scaling signal KD added in the adder circuit 43 is selected to be sufficiently small compared to the addition output signal ADK of the adder circuit 42, and the rate data signal R
1), it gives a change of about ``+2'' to the valence of ``han tain'', and in most cases, the output signal AD of the adder circuit 42
This is the data that is added by the decimal value S of . Note that a deodorizing circuit such as a multiplication circuit may be used instead of the addition circuits 42 and 43. In the above configuration, state Warisen 1 [I, : 11 path 3
0 is calculated as ω in FIG.
) Also, an envelope signal Vl having an envelope waveform of (C) is formed. In other words, the state control circuit then goes to step SP in FIG.
At S3, soft
AND gate 3 sends the gate control signal SUS of J and controls the passage of the abrasive pulse signal CL to gate circuit 4.
1 to prevent the calculation circuit 5 from performing addition and reward subtraction operations. At this time, the envelope signal Vl maintains an all-10'' level. The state open side 1 circuit 30 moves to step SP3 and judges whether the first key-on No. 4m KON becomes 1θ buried 11'', and if 1!7 is added, step S again.
PI K returns, and thus the state control circuit side enters a state in which it waits for the generation of a new key-on No. 1g KON. Eventually, in step SP3, the key-on signal KON becomes ``1'', and the state system (g circuit (9) moves to the next step SP4 VC and logic gate control M1 double number SUS. At the same time, in the next step SP5, the reset signal BS for the arithmetic circuit 5 is set to logic "1" to set the envelope function Vl to the operation start level (all "0" level).Next step SP6 state system (ill t
=+ path 3fJ attacks state signal ST
OK switching and 7j11ntq: for route 5 -
Specify addition operation by setting lH number LJI) to logic rlJ. At this time, the change value data generation circuit 28 sends out the change value data signal Vl) having the change 110 described above with reference to FIG. Thus, envelope buoy No. 8 VL is all 10.
The attack waveform part W1 rises exponentially from the level.
Form and go. On the other hand, since the ST NU ST has become the attack stage SO[, selector 36 of the target value setting section O and the attack level signal TL are selected and compared as the target value TG, given to the partner. The signal is softened relative to the envelope signal VL. Next, between state control ii4+1(4), step SP
7, it is determined whether the key-on signal KON is logic 1'1" or not. If a positive result is obtained, the process moves to the next step SPH and the envelope signal VL is set as the expected value signal TG.
(that is, the attack level signal TL). If the negative result is YES at this time, it means that the stabbing in the attack state 80 has not yet been completed, so the process returns to step SP6 and the judgments in steps SJ'7 and SF3 are executed again. Here, the ↑11 disconnection in step SP7 is executed to confirm that the key has not been released during the process, and if a negative result is obtained, the process jumps to step 5P15 and the Jtlol path 5 is released. t” S 2
K jl'iil (m+ immediately causes the envelope signal VL to disappear. On the other hand, in step SP8, the envelope signal VL becomes the target value signal TG (that is, the attack level signal TL). When pressed, the state control circuit 30 changes the state No. 16 ST to decay-sustained state in step 5P9 (at the time of F4 in FIG. 0'' to specify the leg reduction operation.Therefore, the arithmetic circuit calculates the layered data signal vL) of the change value data X1 coming from the change value data X1 and the envelope signal VL. I'm going to go to Shibu 1 Ke1
It forms a limb shape HW2- and attaches. At this time, the selector 36 applies the sustained level signal SL to the ratio signal TG as the target value signal TG in response to the state signal STYτ. The state control (b) path is the next step spi.
. , key No. 1748 KON is ==q
If a positive result is obtained, proceed to the next step 5 PII.
It is determined whether or not itr4 is equal to or less than the signal TG (that is, the sustaining level signal SL). If a negative result is obtained, the state control circuit 1 circuit 30 +XA returns to step SP9 and performs steps 5PIO and S
If a negative result is obtained in step 5PIO, the key is set to 1frlI, so the process jumps to step 5P15, which will be described later, and the envelope signal VL is immediately destroyed. On the other hand, when #c Zhu is called in step 5PII, in the next step 5P12, the state control 1 circuit 80 determines whether the envelope waveform mode specified by tone selection No. 18 TC is a sustained tone or Determine whether it is a decreasing sound type, and if a sustained sound type envelope is specified, move to the next step 8P13 and set the gate control I signal SUS to logic "1" and turn on the gate circuit 29VC.
The envelope signal Vl is prevented from changing by preventing the spiritual data signal VD from being overflowed,
Thus, a continuous waveform portion W3 is formed at time t1° in FIG. At this time, the state control circuit determines whether the key-on signal KON is logic 11 in the next step 5P14, and if it is affirmative, the process returns to step 5P14 again to wait for the key to be released. Eventually, if a negative result is obtained in step S)'14, the state system 1 circuit 3tJ will proceed to the next step 5PI5.
By moving the state signal ST to the release state S2, the change value data generation circuit sends out the change value data signal VD of the change value "1", and
The operation designation signal UL) is set to logic "0". And next step 5P16 VC transfer, gate control signal SU
By burying S to "0" and applying a calculation timing signal CL to the gate (b) sketch, the arithmetic circuit 5 decreases the envelope signal VL by a change value of "1". , thus starting to form the release waveform part W4 at time t□3 in FIG. 8. Next, the state control circuit (material) moves to step 5P17, and the release end detection circuit detects that the envelope signal VL is completely set based on the detection signal WE. Determine whether it has become "0" or is old.Here, release end extraction circuit 1 34 is 9
When it receives the parallel 9-bit envelope signal VL and becomes all "0", Hayabusa's logic "1" is generated.
The release end detection signal RE is sent out. Step S If a negative opinion is obtained in PI3, go to step 5P15 again and repeat steps 5P15 and 5P16.
, 8P17 are repeatedly carried out, and thus it waits for the envelope signal VL to fall to the all "0" level. Eventually, in step 5P17, when the award is obtained, the state control circuit 3o outputs the envelope signal V.
l. It is determined that the envelope waveform generation operation is completed when the glue lease is positive, and the process returns to the standby state of step SPI described above at time t14 in FIG. In this way, the envelope of the envelope waveform of a sustained tone as shown in Figure 8 ω)K (= sign V L is m arithmetic circuit 2
! Formed at 5. On the other hand, if the judgment result of the envelope waveform mode in step S PI3 is an attenuated tone, the state control circuit jumps to steps 5P13 and 5P14 and proceeds to step 5P15 Ky.
PI3 and SPI3 immediately enter the release state 82 without forming the continuous forming portion W3, and as a result, the envelope with the attenuated sound shape as shown in FIG. 8(C) is produced.
The signal VL can be obtained from the calculation circuit @25. 5. According to the configuration shown in FIG. 5, the attack waveform section W from the arithmetic circuit station from all rOJ levels to the attack level TL is transmitted to the room, and then from the attack level Tl to the sustaining level SL. After the waveform eW2 falls, the sustaining waveform part W3 of this sustaining level SL continues, and then from the sustaining level SL all 10'' level 1 IJ-su waveform part W4 falls, as shown in FIG. 8(B). It is possible to obtain an envelope signal VL in the form of a sustained tone, or it is possible to obtain an envelope signal VL in the form of a continuous tone, as shown in FIG. 8(C), which does not have the continuous waveform portion W3. In this way, the generation time of each of the waveform portions W1 to W4 is determined by nν in accordance with the timing of the division timing pulse signal CL from the calculation timing control circuit according to the setting operation conditions when the oil smells. , the value corresponds to the selected tone and the pitch of the pressed key. That is, the reference period of the calculation timing pulse signal CL in each waveform portion W1 to W4 is determined by the timbre selection signal TC and the state signal S'l in the rate memory 41, and this reference period is determined by the timbre selection signal TC and the state signal S'l in the key scaling signal generation circuit 49. Selection 1 is the key scaling signal KS obtained by the signal TC and the key code signal KC.
The pitch is corrected by 1b compared to the pitch (that is, the pressed key). In other words, the envelope signal VL obtained from the arithmetic circuit 5 has a waveform similar to the envelope KIA of the musical tone of a natural instrument. In addition, the generation time of the release waveform portion W4 can be adjusted according to the player's comfort by manually operating the sustain length adjustment lever 7 (FIG. 3). That is, the sustain length signal generation circuit 45&''s, which is manually constructed, the sustain data signal SLJ, and the state signal S'T, when the release waveform portion W4 is generated, manually sets the sustain length (no. The reference period of the 4-ming pulse signal CL is corrected.In this way, the envelope signal Vl obtained from the 'fix circuit 5 has the length of its release waveform portion W4 changed according to the user's preference, thus producing a musical tone. The sustain effect can be changed by manual operation.This means that the standard sustain length that is automatically obtained based on the standard rate signal TRK of the rate meter 41, and the manual redundant sustain length generated for each issue. This means that the sustain length manually obtained based on the manually set sustain length signal MDIIC of the circuit 45 can be selected as necessary, and therefore an electronic musical instrument with even greater expressive ability can be obtained. look,
When forming the release waveform part W4, the rate memory 4
1 constitutes a reference sustain length signal generator j&7a1' which generates a reference rate signal TR which functions as a reference sustain length signal in addition to the dynamically set sustain length signal MDK. In the above, the case where the envelope signal VL falls linearly as the release waveform part W4 has been described, but as shown by the dashed lines in FIG. You can change history in 4 ways, such as by doing K. In this case, from the data generation circuit, change when S2 (No. 8 ST is release stay)
As shown in FIG. 12, the change obtained when the sea urchin envelope signal VL falls from the all "1" level to the all 10" level and is struck. The change value that changes exponentially in accordance with the specified force t7 to tOK in the 1' direction. It is only necessary to make the data number Vl) appear one after another. In addition, in the above description, the present invention is applicable to the case where the arithmetic operation is carried out at predetermined intervals in the arithmetic circuit 5 when creating the drum-shaped part W2 and the IJ-s waveform part W4. applied, but is not limited to this? Y
The calculation cycle of the ll arithmetic circuit 5 (the corresponding timing pulse signal C
The present invention can also be applied to the case where the change value data signal VD (L(7) synchronization) is changed in accordance with the current value of the envelope signal VL in the same manner as in the case of the change value data signal VD described above. Furthermore, in the above, C causes the arithmetic circuit δ to perform an addition operation when forming the attack THL# section W1, and performs a subtraction operation when forming the dig drum-shaped section W2 and the IJ IJ-S waveform section W4. However, instead of this, when forming the attack waveform mW1, subtract the all rlJ level as a reference, and when forming the 4-waveform part W2 and the IJ-1 waveform part W4, the force ++St. You can also do it. In addition, although the above description is about a single-tone electronic musical instrument, it is also possible to use a Tawarone electronic musical instrument using Ayachi's sound generation assignment circuit, and in this case, the envelope signal generator 11
It is preferable to generate the envelope signal ML for each sound generation channel in a time-division manner. For this purpose, the shift register 26 shown in FIG. 5 is set to the number of stages equal to the number of sound generation channels, and the key-on signal KON of each sound generation channel is input from the sound generation allocation circuit in a time-division manner. The above-described envelope signal generation operation for the time-division key-on signal KON&1 may be performed in a time-division manner for each sound generation channel. As described above, according to the present invention, it is possible to automatically set the optimal standard sustain length for the selected timbre, and the player can, for example, double the standard sustain length regardless of the timbre. , progress times, h times・
. . . 5. You can easily obtain a sustain effect that can be changed manually at will.

[Brief explanation of the drawing]

Fig. 1 is a signal waveform diagram showing the envelope waveform to be generated, Fig. 2 is a line connection diagram showing a conventional envelope signal generator, Fig. 3 is a route diagram showing the sustain major lever, Fig. 4 is 'Block diagram showing the schematic configuration of Kushikoeki,
Figure 5 is a block diagram showing one embodiment of an envelope signal generator for an electronic musical instrument according to the present invention, and Figure 6 is a chart provided between stations of the value data used for IJg calculation of each waveform part.
Figure 7 is a signal waveform diagram showing the clearing of the attack drum section, Figure 8 is a signal waveform diagram of the generated envelope signal provided between stations, and Figure 9 is the relationship between the rate data signal and the I/O time. 10 is a diagram showing the details of the key scaling signal generation circuit, FIG. 11 is a flowchart showing the operation of FIG. It is a chart showing another example of the change data used for the voice true. 1...Envelope signal generator, 2]...Emperor No. 11i formation capital, 22...Calculation timing footing, wings...eye 0! i! 1 General foot, δ...Settlement circuit, Valley...Change Senkiri Kyo circuit, ka...Change value data generation circuit, 29...-Gate circuit, (Equipment)...State control sword! Circuit, 41... Rate memory, 42, 43...
・Addition circuit, 44...-0J4 Its timing control side 1 circuit, 45...Manual setting sustain length signal forming circuit, 4
6... Sustain length memory, 47... Game 1-[1
? l path, 49...key scaling signal generation circuit, function...key scaling 1) scaling constant memory, 51... multiplication circuit. Applicant's agent 1) Motoichi Hen / Figure 1+ρU +l+JII+1+-,! i Z
, S J --◆謬 Z Figure 4 Figure a Figure 7 Figure 6

Claims (1)

[Claims] 1. The musical tone signal generating means has a tone according to tone selection No. 41 sent from the tone selection means, and has an envelope Z.
``In an electronic equipment that generates a musical tone signal having an amplitude envelope corresponding to the envelope signal generated from the signal generating means, the standard sustain length signal generating means generates a standard sustain length signal corresponding to the tone of the le tone selection signal; , manual 651f sustain length signal generation means for generating a manually set sustain length signal according to the player's operation;
[1] A sustain length control means for controlling the sustain length of the envelope signal generated from the upper envelope rope generation means by the reference sustain length signal and the manual sustain length signal; do'
Sustain effect control device for a certain type of skewer. 2. The reference sustain length signal generation means is a rate memory that generates the reference sustain length signal, and the manual setting sustain length signal generation means is configured to generate a manual static sustain length signal according to the adjustment position of the sustain length adjustment operator. Set the sustain length memory that generates the long signal to 1, and set the sustain length memory that generates the long signal to 1.
3. The sustain effect control device for an electronic musical instrument as set forth in claim 1, wherein the reference sustain length signal can be modified by the manually set step signal in the control means. 3. The upper pizza step 1 length control means increases the speed at which the release waveform portion of the upper if envelope signal is formed.
Sustain effect control 1 of an electronic musical instrument, which is controlled by a composite signal of the standard sustain length signal and the above-mentioned manually added signal.
Device.