JPH02294692A - Musical sound waveform signal generating device - Google Patents

Abstract

PURPOSE:To generate a musical sound waveform signal of timbre close to a wind instrument sound by providing a means which simulates the flow state of air of a mouthpiece part. CONSTITUTION:A musical sound control signal generated by a musical sound control signal generation part 30 according to play information from a play information generation part 10 and timbre information from a timbre information generation part 20 is supplied to the musical sound waveform signal generating device consisting of a musical sound control signal input part 100, a waveform signal loop part 200, and a waveform signal transmission part 300 to generate the musical sound waveform signal. The waveform signal loop part 200 feeds part of a waveform signal representing an incident wave W1 propagated to the signal transmission part 300 back to the control signal input part 100 through the operation of adders 251 and 252 and also feeds part of a waveform signal representing a reflected wave W2 propagated to the control signal input part 100 back to the signal transmission part 300. The variation state of the air flow right behind the gap between the mouthpiece 41 and a reed 42 is therefore simulated very well. Consequently, the musical signal which is close to the sound of a wind instrument can be generated.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a musical waveform signal forming device used in electronic musical instruments, music education devices, toys, etc., and particularly to a musical waveform signal forming device suitable for forming a musical waveform signal with a tone similar to the sound of a wind instrument. ．．

[Prior art]

Conventionally, this type of device has been disclosed, for example, in Japanese Patent Application Laid-Open No. 63-40199.
As shown in the publication, the first path as the outgoing path of the waveform signal
A signal line, a second signal line as a return path of the waveform signal, a musical tone control signal for controlling the musical tone elements of the musical tone to be generated, and a waveform signal from the second signal line, and both input signals. A musical tone control signal input section that synthesizes signals and outputs them to the first signal line; and a musical tone to be generated by performing predetermined signal processing on the waveform signal input from the first signal line and returning it to the second signal line. The musical tone control signal input section is made to correspond to the mouthpiece section of a wind instrument, and the waveform signal transmission section is made to correspond to the resonance tube of a wind instrument. A musical sound that imitates the musical sound of a wind instrument, etc. is generated by inputting a musical sound control signal according to performance information to a musical sound control signal input section and generating a waveform signal according to the input musical sound control signal. ing. Further, in this device, in order to imitate the state of air flowing in the mouthpiece section, a nonlinear table is provided in the musical tone control signal input section, and a composite signal of the inputted musical tone control signal and waveform signal, and The signal is combined with a signal obtained by nonlinear conversion using a nonlinear table, and the synthesized signal is output to the first signal line.

[Problem to be solved by the invention]

However, in the above-mentioned conventional device, even if the musical tone control signal input section synthesizes a composite signal of a musical tone control signal and a waveform signal, and a signal obtained by nonlinearly converting the composite signal using a nonlinear table, There was a problem in that it was not possible to accurately imitate the state of air flow in the mouthpiece, and it was not possible to form musical waveform signals with good sound quality. The present invention has been made to solve the above problems, and its purpose is to provide musical waveform signal formation &'liR that forms musical waveform signals with good sound quality. In order to achieve the above object, the structural feature of the invention according to claim 1 is that the first signal line is the outgoing path of the waveform signal, and the second signal line is the incoming path of the waveform signal. A musical tone that inputs a signal line, a musical tone control signal for controlling musical tone elements of a musical tone to be generated, and a waveform signal from a second signal line, synthesizes the input signals No. 18, and outputs the synthesized signal to the first signal line. a control signal input, a waveform signal transmission section that performs predetermined processing on the waveform signal input from the first signal line and returns it to the second signal line to obtain a resonant frequency corresponding to the pitch of the musical tone to be generated; In the musical sound waveform signal forming device, the musical sound control signal input section is configured to include a first synthesizing means for synthesizing the input musical tone control signal and the waveform signal, and a synthesized signal synthesized by the first synthesizing means, respectively. first and second nonlinear converting means for inputting and nonlinearly converting each of the input composite signals, and a second nonlinear converting means for combining each output of the first and second nonlinear converting means and outputting the result to the first signal line.
The reason is that it is composed of a synthesis method. Moreover, the above claim 2
A structural feature of the invention according to claim 1 is that the musical tone control signal input section of the invention according to claim 1 includes first and second synthesizing means for respectively synthesizing the inputted musical tone control signal and the waveform signal, and a first synthesizing means. a first nonlinear conversion means for inputting the composite signal synthesized by the means and nonlinearly converting the input composite signal; The present invention is replaced by a musical tone control signal input section consisting of a second non-linear converting means for converting, and a third synthesizing means for synthesizing the respective outputs of the first and second non-linear converting means and outputting the result to the first signal line.

[Action of the invention]

Claim 1 configured as above. In the invention according to item 2, similarly to the conventional device described above, the waveform signal outputted from the musical tone control signal input section based on the musical tone control signal connects the first signal line, the waveform signal transmission section, and the second signal line. A musical waveform signal is formed while being fed back through the In such a case, in the musical tone control signal input section of the invention according to claim 1, the first and second nonlinear converting means nonlinearly convert the synthesized signal from the first synthesizing means, and the second synthesizing means and the respective signals from the second nonlinear conversion means are combined and output to the first signal line. Furthermore, in the RakuW control signal input section of the invention according to claim 2,
The first and second nonlinear transformation means nonlinearly transform each composite signal from the first and second synthesis means, and the third composition means synthesizes each signal from the first and second nonlinear transformation means and generates a Output to 1 signal line. In both of these cases, each signal input to the first and second nonlinear conversion means is converted into I! Synthesis No. 18 is connected to the air pressure (air flow) from the l pipe, and one of the first and second nonlinear conversion means has a nonlinear characteristic of the amount of displacement of the reed with respect to the applied pressure (in the case of a reed instrument) ), the output of the nonlinear conversion means corresponds to the air passage area by providing a nonlinear characteristic representing the degree of opening of the lips with respect to the applied pressure (in the case of a brass instrument), and the other of the first and second nonlinear conversion means By providing a nonlinear characteristic in which the flow velocity with respect to pressure is saturated in a narrow pipe, the output of the nonlinear conversion means can be made to correspond to the air pressure corrected in consideration of the saturation. It is possible to output a signal that accurately represents the air flow velocity in the mouthpiece of a wind instrument.

【Effect of the invention】

As is clear from the above description of the operation, according to the invention according to claim 1.2, it is possible to generate a signal that accurately represents the air flow velocity in the mouthpiece portion of a wind instrument, so that a musical sound imitating the sound of a wind instrument can be produced. , it is possible to create new musical tones based on the sounds of the same instrument with higher quality.

【Example】

a. First Embodiment Below, the first embodiment of the present invention will be explained with reference to the drawings.
FIG. 1 is a block diagram of an electronic musical instrument equipped with a musical waveform signal forming device suitable for forming musical sound signals for reed instruments such as clarinet and saxophone. This electronic musical instrument includes a performance information generating section 10 and a tone information generating section 2.
0 and musical tone M#1M number generating section 30, the musical tone control signal generated from the musical tone control signal generating section 30 based on the performance information from the performance information generating section 10 and the tone color information from the timbre information generating section 20 is provided. , a musical tone control signal input section 100, a waveform signal loop section 200, and a waveform signal transmission section 300. The performance information generating section 10 includes a keyboard consisting of a plurality of keys corresponding to musical scales, a key press detection circuit that detects whether or not each key is pressed, an initial touch detection circuit that detects the i'Fil operation speed, and a key press. It is equipped with various circuits associated with the keyboard, such as an aftertouch detection circuit that detects the pressure or depth of key depression, and outputs performance information such as presence or absence of key depression, initial touch, and aftertouch. The timbre information generating section 20 includes a timbre residual switch and an operation detection circuit for the switch, and outputs timbre information representing the selected timbre. The musical tone control signal generating section 30 is composed of, for example, a microcomputer, a musical tone control parameter storage table, etc., and outputs various musical tone control signals by referring to the table according to the performance information and timbre information. These musical tone control signals are determined by, for example, a pitch signal PIT that is determined by the keys pressed on the keyboard and represents the pitch of the generated musical tone, initial touch performance information, aftertouch performance information, and timbre information, and is Oral pressure (
The instrument consists of an intraoral pressure signal PRES representing the blowing pressure) and an amplifier surreal signal EMBS determined from the above-mentioned performance information and representing the posture, tightening, etc. of the lips when playing a wind instrument. Note that if a mouse controller equipped with a sensor for detecting breath pressure or the like can be connected to the electronic musical instrument of this embodiment, part of the performance information may be obtained from the mouse controller. Furthermore, when the present invention is applied to an electronic wind instrument, the various performance information is obtained from the performance section of the wind instrument. Further, as the performance information generation section IO and the tone information generation section 20, other musical instruments, automatic performance devices, etc. are adopted, and the musical tone control signal generation section 30 receives performance information and tone color information from the other musical instruments, automatic performance devices, etc. The various musical tone control signals may be supplied to the musical tone control signal input section 100 and the waveform signal loop section 200 by forming the various musical tone control signals in other musical instruments or automatic performance devices.
and the waveform signal transmission section 300 may be directly supplied to the musical waveform signal forming device. The musical tone control signal input unit 100 has a subtracter 151, and the subtracter 151 subtracts the oral pressure signal PRεS from the waveform signal from the signal line L2, which forms the return path of the waveform signal, thereby producing a composite signal of both signals. Output. In such a case, the waveform signal from the signal line L2 represents a reflected wave that has propagated from the resonance tube into the mouthpiece, and the subtraction is
As shown in the figure, the reed 42 is displaced according to the pressure difference between the intraoral pressure PRES and the reflected wave pressure Q propagated from the resonance tube into the mouthpiece 41, and an incident wave is formed according to the displacement. The output of the subtracter 1151 corresponds to the differential pressure for displacing the reed 42 of the mouthpiece 41. A low-pass filter 152 is connected to the output of the subtracter 151, and the filter 152 removes the Takagi component of the differential pressure signal and outputs the signal. This is because the lead 42 does not respond to the Takagi component. An adder 153 is connected to the output of the low-pass filter 152.
adds the Amp Schur f8 EMBS and the output of the low-pass filter 152 and outputs the result to the nonlinear table 154. By adding the Amplifier Schul signal group BS in the adder 153, corrections due to lip posture, tightening, etc. are simulated in relation to the displacement of the lid 42 with respect to the differential pressure. The nonlinear table 164 shows the nonlinear characteristics of the bending of the lead 42 relative to the force, that is, the nonlinear characteristics of the lead 42 relative to the applied pressure.
It simulates the amount of displacement of 2, and has input/output characteristics as shown in Figure 3, for example. As a result, the output of the nonlinear table 154 becomes a signal representing the air passage area in the reed 42 portion of the mouthpiece 4l. The output of this nonlinear table 154 is connected to one input of a multiplier 155. The differential pressure signal from the adder 151 is supplied to the other input of the multiplier 156 via a nonlinear table 156.
This nonlinear table 156 simulates the fact that even if the differential pressure increases, the flow velocity is saturated in a narrow passageway and the differential pressure and flow velocity are not proportional. ing. As a result, a differential pressure signal corrected in consideration of the influence of the differential pressure on the flow velocity at the lead 42 in the mouthpiece 41 is supplied to the other input of the multiplier 155. Then, the multiplier 155 multiplies the signals supplied to both inputs, that is, the signal representing the air passage area in the lead 42 portion, and the corrected differential pressure signal, and outputs the result.The output signal of the multiplier I55 is piece 41
This signal represents the air flow velocity at the inner lead 42 portion. The output of the multiplier 155 is connected to the input of a multiplier 157, which multiplies the signal representing the air flow velocity by a fixed coefficient K representing the impedance (air resistance) within the mouthpiece 4l to obtain the result. The multiplication result is supplied as a sound pressure signal to the waveform signal loop section 200 via the signal line L1. The waveform signal loop unit 200 is composed of adders 251 and 252 inserted into each signal line Ll and L2. The adder 251 adds the waveform signal supplied from the signal line L1 to one input and the waveform signal supplied from the signal line L2 to the other input, and outputs the result to the signal line L1. A waveform signal is supplied from signal line L2 to one input, and signal line L is supplied to the other input.
The waveform signal supplied from I is added to the signal line L2.
This is what is output to. As a result, as shown in FIG. 2, an incident wave W1 due to the input flow velocity immediately after the gap between the mouthpiece 4I and the lid 42, and an anti-piercing wave W2 from the resonance tube.
The state of pressure Q is simulated as a combination of both waves Wl and W2. The waveform signal transmission section 300 is connected to the signal line Ll.
The above waveform signal is subjected to predetermined signal processing and the signal line L2 is
The feedback path is provided with a low-pass filter 351, a high-pass filter 362, and a delay circuit 35.
3 is interposed. The low-pass filter 351 and the high-pass filter 352 basically simulate the shape of a resonance tube, and their cutoff frequencies are changed and controlled according to the pitch signal PIT, that is, the pitch of the generated musical tone. It's singing. ! The extension circuit 353 simulates a rice grain in which the incident wave entering from the mouthpiece 4J returns to the mouthpiece 41 as a reflected wave, corresponding to the length of the resonance tube and the length from the end of the resonance tube to the tone hole. It is intended to be In such a case, the delay time of the delay circuit 353 is variably controlled by the pitch signal PIT, and the pitch of the generated musical tone is mainly determined by the variable control of the delay time. Further, a bandpass filter 401 for simulating the radiation characteristics of musical tones in the air is connected to the signal line Ll, and a waveform signal is output from the filter 401. Next, we will explain the operation of the electronic musical instrument configured as above. When various performance information from the performance information generation section 10 and tone information from the timbre information generation section 20 are supplied to the musical tone control signal generation section 30, the control signal generation BF 330 generates oral pressure signals PRES, An amplifier surreal signal EMBS and a pitch signal PIT are respectively output. The oral pressure signal PRES is combined with a waveform signal representing the reflected wave W2 from the signal line L2 in the subtracter 101 of the musical tone control input section 100, and is output from the subtracter 151. In such a case, the low-pass filter 152, adder 153, nonlinear tables 154, 156, and multiplier 155 are
As mentioned above, the air flow velocity is expressed by taking into account the mass of the lead 42, the influence of the amplifier Schul on the lead 42, the nonlinear displacement characteristics with respect to the pressure of the lead 42, the saturation characteristics of the flow velocity with respect to the pressure of air passing through a narrow conduit, etc. While forming a signal, the signal representing the air flow velocity is converted into a signal representing sound pressure by a multiplier 157, and is supplied to the waveform signal loop unit 200 via the signal line L1. In the waveform signal loop unit 200, an adder 251.2
52, a part of the waveform signal representing the incident wave Wl traveling to the waveform signal transmission section 300 via the signal line Ll is fed back to the musical tone control signal input section 100, and the musical tone control signal is transmitted via the signal line L2. A part of the waveform signal representing the reflected wave W2 traveling to the signal input section 100 is returned to the waveform signal transmission section 300, so that the mouthpiece 4l and the reed 4
The changing state of the airflow immediately after the gap between the two is better simulated. The waveform signal that has passed through the waveform signal loop section 200 is supplied to the waveform signal transmission section 300, where it is changed by a low-pass filter 351 and a high-pass filter 362 according to the characteristics of the resonant tube, and is then changed by an M extension circuit 353. The signal is delayed and fed back to the subtracter 15 of the tone control signal input section 100 via the waveform signal loop section 200 again. In such a case, the delay circuit 353 is controlled by the pitch signal PIT and delays the waveform signal by a time corresponding to the pitch of the played key, so that the waveform signal output from the musical tone control signal input section 100 is connected to the signal line. L1. The time until the signal is fed back to the input unit 100 via L2 will approximately correspond to the pitch of the key, and the waveform signals on the signal lines Ll and L2 will have a fundamental frequency corresponding to the pitch of the key. Become. Then, this waveform signal is filtered through a bandpass filter 401.
Output via . As can be understood from the above explanation of the operation, the musical waveform signal forming device having the above configuration is capable of controlling the formation state of the acoustic signal in the mouthpiece 41, especially the mass of the reed 42, the influence of the amplifier circuit on the reed 42, and the influence of the reed 42 on the reed 42. The nonlinear displacement characteristics with respect to pressure and the saturation characteristics of air flow velocity with respect to pressure of air passing through a narrow pipe are closely simulated, and the transmission state of acoustic signals in a resonant tube is better simulated. This makes it possible to create musical sound signals that are close to the sounds of wind instruments with reeds such as the following. b. Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 shows, in block form, a musical waveform signal forming apparatus that is optimal for forming musical tone signals for brass instruments. This musical waveform signal forming device is also formed by a musical tone control signal input section 100, a waveform signal loop section 200, and a waveform signal transmission section 300, as well as a musical tone control signal generating section 30, as in the case of the first embodiment. , a pitch signal PIT corresponding to the frequency of the generated musical sound and an oral pressure signal P
RES is output, but in such a case, a cutoff frequency control signal Fθ (pitch signal P
(not necessarily consistent with IT) is output. The musical tone control signal input section 100 includes an adder 161 and a subtracter]
It has 62. The adder 16] is a delay circuit 16 which is input from the signal line L2 and delays the waveform signal by a minute time.
3 and the oral pressure signal PRE.
By adding S, a signal representing the pressure of pressing the lips apart is output. The output of the adder 161 is connected to a low-pass filter 64, which removes high-pitched components of the supplied signal and outputs the result. In such a case, the low-pass filter 164 is supplied with a cut-off frequency control signal F@, and the cut-off frequency and resonance frequency of the filter 164 are adjusted according to the power cut-off frequency control signal F@, as shown in FIG. Controlled by FII. This simulates the fact that the frequency of the generated musical tone is controlled by the tightening of the lips in a brass instrument, and the low-pass filter 164 is connected to the signal line Ll, It plays the role of controlling the frequency of generated musical tones by controlling the oscillation frequency in the signal circulation path by L2. Low pass filter 1
A nonlinear table 165 is connected to the output of B4, and the table 165 simulates the degree of opening of the lips in response to the pressure, and has input/output characteristics as shown in FIG. As a result, the output of the nonlinear table 165 becomes a signal representing the gap area between the mouthpiece and the lips.
The output of this nonlinear table 165 is connected to one input of a multiplier 166. The other input of the multiplier 166 is supplied with a signal from the nonlinear table 167;
The input of the table 167 includes the oral pressure signal PRE.
By subtracting the waveform signal from the delay circuit 163 from S, a signal that is a composite of the oral pressure signal PRES and the signal fed back via the cancellation line L2 is supplied. In such a case, the output signal of the subtractor 162 represents a signal representing the pressure difference before and after the lips, and the nonlinear table 167
[Nonlinear table of the embodiment] 56 (see Figures 1 and 4 p.
Similar to li), it simulates the saturation of the air flow velocity by correcting the pressure difference, and is set to the input/output characteristics as shown in Figure 8. This allows a more concrete simulation of the relationship between the gap area of the lips and the pressure flow in the mouthpiece of a brass instrument. Then, a multiplier 166 multiplies the signal representing the corrected pressure difference from the nonlinear table 167 by the signal representing the gap area from the nonlinear table 165 to calculate a signal representing the air flow velocity. The calculated signal is supplied to the waveform signal loop section 200 via the signal line L1. As a result, the waveform signal loop section 2
00 will be supplied with a waveform signal that simulates the sound waves in the mouthpiece of a brass instrument. The waveform signal loop unit 200 is configured in exactly the same way as in the first embodiment, including adders 261 and 262, and, as described above, is used to simulate the changing state of the airflow within the mouthpiece. be. The waveform signal transmission section 300 includes adders 361 to 363 that add and combine waveform signals and output the resultant signal, and a fixed coefficient K (
=Ko. K. -+...K+) multiplier 364
and a delay circuit 365 that delays the waveform signal as one set.
Kelly-0 Zuffbaum (κe
It has an Iy-Lochbaus) type lattice cascade circuit. This cascade circuit approximates the propagation of sound waves in a conical tube and is often used for speech synthesis. In such a case, each delay circuit 365, 36
5...366 delay times are controlled by the pitch signal PIT, and each delay circuit 365, 365...365...366 is controlled by the pitch signal PIT. The sum of 366 corresponds approximately to the frequency of the generated musical tone. Roughly speaking, at the end of this cascade circuit is a low-pass filter 368 for simulating the frequency characteristics of the resonance tube.
is interposed therein, and a waveform signal is output from the input side of the filter 368 via a bandpass filter 401 in the same manner as in the first embodiment. In the second embodiment configured as described above, the gap area of the lips and pressure flow velocity relationship in the mouthpiece of a brass instrument are accurately simulated in the musical tone control signal input section, and the simulated waveform signal is generated. The signal is output to the waveform signal loop section 200. The waveform signal loop unit 200 simulates the changing state of airflow within the mouthpiece, and the waveform signal transmission unit 300 simulates the vibration state of sound waves in the resonance tube of a brass instrument.
1 outputs a musical sound waveform signal that closely resembles an actual brass instrument. C. Modification (1) In the first embodiment, the oral pressure signal PRε
A subtracter 15 subtracts S and the feedback signal from the signal line'' and PL2.
1, and both nonlinear tables 154 and 15
In the second embodiment, the intraoral pressure signal PRES and the feedback signal from the IS line L2 are combined by an adder 161 and a subtracter 1G2, respectively. At the same time, the outputs of both nonlinear tables 105 and 167 are combined by a multiplier 166, but these subtracters 153 and 162 and adder 161
The multipliers 155 and 186 can be replaced with subtractors by taking into account the positive and negative signs of each input/output signal, the display method of the same signal (linear display, logarithmic display, exponential display), etc. It is also possible to configure it with various arithmetic units, such as configuring the adder with an adder, the adder with a multiplier/divider, and the multiplier with an adder. (2) In each of the above embodiments,
Although the nonlinear tables 154, 156, 1135.1 (37) are constructed from a single nonlinear table, each of these tables 154, 156, 165, 167.k may also be constructed from a combination of a plurality of nonlinear tables. In addition, the nonlinear tables 154, 156, 165
, 167, desired nonlinear characteristics may be imparted to the input signal by the following series operation. a@+a+X+a2X2+obviousφ●+a n Let the given variable be. (3) In each of the above embodiments, the adders 251 and 252
．． 261 and 262, the waveform signal loop section 200 is configured, however, it is also possible to further modify the waveform signal loop section 200 by adding an arithmetic circuit such as a multiplier to this loop circuit. (4) In each of the above embodiments, the waveform signal transmission section 300
The waveform signal is outputted from the front stage of the low-pass filters 351 and 368 via the bandpass filter 401, but since the waveform signal progresses while circulating on the signal lines L1 and L2, the waveform signal is The output position may be any position on the signal lines Ll, L2, other than the above location. (5) In each of the above embodiments, only the case of forming a specific musical instrument sound signal such as a saxophone, clarinet, brass instrument, etc. was explained, but a musical waveform signal forming device that generates a new musical instrument sound signal that has not existed before. The present invention can also be applied to.

[Brief explanation of the drawing]

FIG. 1 is an overall block diagram of an electronic musical instrument equipped with a musical waveform signal forming device according to a first embodiment of the present invention, FIG. 2 is a schematic M8 diagram of a mouthpiece portion of a wind instrument, and FIGS. 3 and 4 are 1st
Graph showing the human output characteristics of each nonlinear table in the figure, δth
The figure is a block diagram of a musical waveform signal forming device according to the second embodiment of the present invention, FIG. 6 is a frequency-amplitude characteristic graph of the low-pass filter of FIG. 5, and FIGS. This is a graph showing the human output characteristics of each nonlinear table. Description of symbols IO... Performance information generation unit, 20... Tone information generation section, 30... Musical tone control signal generation section, 100... Musical tone control signal input section, 151.162... Subtractor, 154,
156, 165, I (37... nonlinear table, 15
5.166... Multiplier, 16]... Adder, 200
. . . Waveform signal loop section, 300 . . . Waveform signal transmission section, 353, 365, 366 . . . Delay circuit.

Claims (2)

[Claims] (1) A first signal line as the outgoing path of the waveform signal, a second signal line as the incoming path of the waveform signal, a musical tone control signal for controlling the musical tone elements of the musical tone to be generated, and the second signal line as the inward path of the waveform signal.
a musical tone control signal input section that inputs a waveform signal from a signal line, synthesizes both of the input signals, and outputs the synthesized signal to the first signal line; and performs predetermined signal processing on the waveform signal input from the first signal line. and a waveform signal transmission unit that obtains a resonant frequency corresponding to the pitch of the musical tone to be developed by returning to the second signal line, the musical tone control signal input unit comprising: The first step synthesizes the input musical tone control signal and waveform signal.
a synthesizing means; first and second nonlinear converting means each inputting the synthesized signal synthesized by the first synthesizing means and nonlinearly converting each of the input synthesized signals; and the first and second nonlinear converting means. and a second synthesizing means for synthesizing respective outputs of the means and outputting the synthesized signal to the first signal line. (2) A first signal line as an outgoing path of the waveform signal, a second signal line as the incoming path of the waveform signal, a musical tone control signal for controlling musical tone elements of a musical tone to be generated, and the second signal line
a musical tone control signal input section that inputs a waveform signal from a signal line, synthesizes both of the input signals, and outputs the synthesized signal to the first signal line; and performs predetermined signal processing on the waveform signal input from the first signal line. and a waveform signal transmission unit that obtains a resonant frequency corresponding to the pitch of the musical tone to be generated by returning the signal to the second signal line, the musical tone control signal input unit comprising: first and second synthesis means for respectively synthesizing the input musical tone control signal and the waveform signal; and a first nonlinear device for inputting the synthesis signal synthesized by the first synthesis means and nonlinearly converting the input synthesis signal. a converting means; a second nonlinear converting means for inputting the composite signal synthesized by the second synthesizing means and nonlinearly converting the input synthesized signal; and synthesizing each output of the first and second nonlinear converting means. and a third synthesizing means for outputting the synthesized signal to the first signal line.