JPH1026988A - Musical sound synthesizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make possible suppressing a change in volume sensation according to the change in a tone color by forming the volume level correction data according to the number of delay stages and the dip level data, using the volume level data and performing the volume level correction of the synthetic sound data. SOLUTION: This device is provided with a drive data generation circuit 101 as a drive data generation means, a round type comb filter 107 constituting a first filter means, a non-round type comb filter 112 constituting a second filter means, a volume adjustment operation circuit 113 as an operation means and a multiplier 14 as an amplitude control means. The volume adjustment operation circuit 113 operation outputs the volume level correction data L according to the characteristic of the non-round type comb filter 112, that is, the number of delay stages N and the dip level data D, and multiplies the data L for a waveform sent out from the non-round type comb filter 112. Thus, the volume level of the synthetic sound data is held to a fixed level regardless of the change in the tone color based on the characteristic change in the non- round type comb filter 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical sound synthesizer which is used as a sound source of an electronic musical instrument or the like and synthesizes various instrument sounds by a physical model method.

[0002]

2. Description of the Related Art In recent years, a musical tone synthesizer used as a sound source of electronic acoustic equipment such as a computer and an electronic musical instrument has been developed.
For example, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-199936, various instrument sounds are synthesized by a physical model method, that is, a method of simulating the sounding mechanism of a natural musical instrument by an electronic circuit. Has been proposed.

[0003] The conventional tone synthesizer as described above will be described below with reference to the drawings. FIG. 5 is a block diagram showing a configuration of a conventional tone synthesizer. In FIG. 5, reference numeral 501 denotes a driving data generation circuit for reading out driving data stored in a memory or the like in advance; 502 and 508 delay devices for delaying data for a predetermined time; 503, low-pass filters; 504, 509, multipliers; , 50
6, 511 are delay control circuits for controlling the delay times of the delay units 502, 508, respectively, 510 is a subtractor, 507 is a delay unit 502, a low-pass filter 503, a multiplier 504,
A cyclic comb filter 512 includes an adder 505 and a delay control circuit 506, and a non-cyclic comb filter 512 includes a delay unit 508, a multiplier 509, a subtractor 510, and a delay control circuit 511.

The driving data generation circuit 501 can be easily realized by using a well-known circuit such as a read-only memory in which driving data is stored in advance and a counter which increments a memory address by one according to a sampling clock SCK. The description of the internal configuration is omitted. Also,
The delay units 502 and 508 have read / write memories configured in a ring memory format, and perform read / write operations on addresses of addresses ADR output from the delay control circuits 506 and 511.

FIG. 6 shows delay control circuits 506 and 5 of FIG.
It is a block diagram which shows the structure of No.11. In FIG. 6, 6
01 is a comparator for comparing the count value of the counter 603 with the number of delay stages M of the delay unit 502 or the number of delay stages N of the delay unit 508, and 602 is when the comparison match flag output from the comparator 601 is 1 or when sound generation is started. When the value of the flag KON is 1, the count value of the counter 603 is reset to 0.
An R gate 603 is a counter that increments the value by one according to SCK.

The sounding start flag KON is a flag which becomes 1 only during the first sampling period Ts when the synthesizing process is started in response to a sounding operation such as a key press. FIG. 7 is an explanatory diagram relating to the characteristics of the guitar sound, and FIG.
FIG. 2 is a schematic diagram illustrating a vibration mechanism of a string of a guitar. In FIG. 7A, it is assumed that the strings are fixed at points A and C, and a force (corresponding to drive data) applied when the strings are played with a finger or a pick is applied to point B. FIG. 7B is a graph showing a time axis waveform of the guitar sound. In FIG. 7B,
The horizontal axis and the vertical axis are axes representing time and amplitude, respectively. FIG.
(C) is a graph showing the amplitude frequency spectrum of the guitar sound. In FIG. 7C, the horizontal axis and the vertical axis are axes representing frequency and amplitude, respectively. FIG. 7D is a graph showing the amplitude frequency spectrum of the driving data of the guitar. In FIG. 7D, the horizontal axis and the vertical axis are axes representing frequency and amplitude, respectively.

FIG. 8 is a graph showing the transfer characteristics of the non-recursive comb filter 512. FIG. 8A shows that the number of delay stages N of the delay unit 508 in FIG.
8 and the transfer function when the dip level data D given to the multiplier 509 has a value of 0.5.
5B shows that the number of delay stages N of the delay unit 508 in FIG.
02, which is 1/2 of the number M of delay stages of the multiplier 509.
8 is a transfer function when the dip level data D given to the value of 0.5 is 0.5. FIG. 8C shows that the number N of delay stages of the delay unit 508 in FIG. ,
Further, this is a transfer function when the dip level data D given to the multiplier 509 has a value of 0.0.

[0008] The horizontal axis and the vertical axis are axes representing frequency and amplitude, respectively. FIG. 9 is a diagram illustrating the characteristics of the string ensemble sound, and FIG. 9A is a graph illustrating the amplitude frequency spectrum of the string ensemble sound.
FIG. 9B is a graph showing an amplitude frequency spectrum of the driving data of the string ensemble. FIG. 9C is a graph showing the amplitude frequency spectrum of the synthesized sound data of the string ensemble. In addition, FIG.
In (c), the horizontal axis and the vertical axis are axes representing frequency and amplitude, respectively.

The operation of the conventional tone synthesizer constructed as described above will be described below. First, FIG.
The vibration mechanism of the strings of the guitar will be described with reference to FIG. In the strings fixed at points A and C, between AB and B
The length ratio between C is 1: 3. A single force (corresponding to drive data) is applied to the string by playing the point B of the string, and propagates in the direction of the dashed arrow. Then, the light is reflected and inverted at points A and C, and returns to point B again. By repeating this operation, the strings vibrate and sound is generated through the body. Here, for the sake of simplicity, the body is omitted, and the sound of the guitar is regarded as the vibration of the strings.

[0010] In addition, high-frequency components are mainly emitted from the strings into the air with the passage of time, and the fixed points A,
Since the vibration energy is consumed little by little at the point C, the time axis waveform of the guitar sound has a shape that gradually decreases over time, as shown in FIG.

The time interval TM between W1 and W3 corresponds to the time required for the waveform propagated from the point B to reflect C → A or A → C and return to the point B again. The interval TN corresponds to the time from when the waveform propagated from the point B reflects only the point A and returns to the point B again.

An equivalent circuit that simulates the above sound generation mechanism is a musical sound synthesizer shown in FIG. In FIG.
The drive data generation circuit 501 supplies the drive data to the cyclic comb filter 507 based on ON and SCK. The supplied drive data circulates through the cyclic comb filter 507 to generate a periodic waveform with a time interval of TM, such as W1, W3, W5,... In FIG. 7B. The high frequency band of the periodic waveform is cut off by the low-pass filter 503 during the circulation, and attenuated by the multiplier 504 multiplied by a gain G (G is less than 1). TM corresponds to the number M of delay stages of the delay unit 502.

The relationship between TM and M is shown in (Equation 1).

[0014]

(Equation 1)

The periodic waveform generated by the recursive comb filter 507 is sent to the non-recursive comb filter 512 and filtered, so that synthesized sound data corresponding to the time axis waveform of the guitar sound shown in FIG. Is obtained. The amplitude frequency spectrum of the synthesized sound data or the guitar sound has a shape as shown in FIG.

That is, the amplitude frequency spectrum of a sound when a quarter of the entire length of the string is played is 4
A dip occurs in the next and eighth harmonics (f4, f8). Generally, when a sound is generated by driving 1 / n of the entire length of a resonance portion such as a string, the amplitude frequency spectrum of the sound is n, 2n, 3n,. Dip occurs. W in the time axis waveform of FIG.
The time interval TN of 1, W2 is the number of delay stages N of the delay unit 508.
Corresponding to

The relationship between TN and N is shown in (Equation 2).

[0018]

(Equation 2)

Incidentally, the dip level data D multiplied by the multiplier 509 is obtained by calculating W2 of W1 with respect to W1 in FIG.
Alternatively, it corresponds to the level ratio of W4 to W3. Here, the driving data is, for example, a signal corresponding to a guitar string or the like (in this case, a cyclic comb filter 5).
07 and a circuit in which the acyclic comb filter 512 is connected in series), and is obtained by reversely convolving the circuit, and corresponds to the force given by a finger or a pick to the string.

Next, the operation of the delay control circuits 506 and 511 will be described. Since both delay control circuits 506 and 511 basically operate in the same manner, only the delay control circuit 506 will be described here.

In FIG. 6, KON is input to an OR gate 602 in response to a sounding operation such as a key press, and a counter 60 is input.
The count value of 3 is reset to 0. After that, the counter 603 increments the count value by one according to the generation timing of SCK. When the value becomes equal to M input to the comparator 601, the comparator 601 sends a comparison match flag to the OR gate 602, and the counter 603
Is reset to the value 0.

By the above operation, the read / write address ADR is transmitted from the counter 603 to the delay unit 502 (read / write memory having a ring memory configuration). Note that A
Since DR first acts as a read address within one sampling period Ts, and immediately thereafter acts as a write address, the delay unit 502 functions as a delay unit for the delay time TM (the number of delay stages M).

Next, the transfer characteristic of the non-recursive comb filter 512 will be described. As described above, when a sound is generated by driving 1 / n of the entire length of the resonance portion such as a string, the amplitude frequency spectrum of the sound is n, 2
n, 3n... A dip occurs in the next harmonic.

Similarly to this phenomenon, when the number N of delay stages of the delay unit 508 in the non-cyclic comb filter 512 is 1 / n of the number M of delay stages of the delay unit 502 in the cyclic comb filter 507, the synthesized sound data Has an amplitude frequency spectrum of n, 2
n, 3n... A dip occurs in the next harmonic. However, the depth of the dip varies depending on the value of the dip level data D in the multiplier 509 in the non-recursive comb filter 512.

For example, when N = M / 4 and D = 0.5, as shown in FIG.
When a dip of dB occurs and N = M / 2 and D = 0.5, as shown in FIG.
A dip of dB occurs. Also, N = M / 4, D = 0.
In the case of 0, no dip occurs as shown in FIG. However, when D = 0.0, no dip occurs regardless of the value of N.

Now, as shown in FIG.
When the drive data of the sound (guitar sound) when there is a dip of about 6 dB in 8... Is obtained, the transfer characteristics of the non-recursive comb filter 512 are previously determined by the characteristics (N =
M / 4, D = 0.5) and convolving the original sound of the guitar with the inverse transfer characteristic of this characteristic, the f4, f8... Component level in FIG. Thus, a periodic waveform (hereinafter, referred to as a periodic waveform W) having the above characteristics is obtained. This is the characteristic of the periodic waveform W to be output from the cyclic comb filter 507.

Further, the number of delay stages M of the delay unit 502 in the cyclic comb filter 507 is set to the pitch of the periodic waveform W, and the characteristic of the low-pass filter 503 is set to be closest to the curve of the amplitude frequency spectrum envelope of the periodic waveform W. Then, the inverse transfer characteristic of the recursive comb filter 507 is obtained by performing various adjustments and the like. Then, by convolving the periodic waveform W with this inverse transfer characteristic, each component of the periodic waveform W falls to a point of substantially the same level, and the amplitude frequency spectrum of the obtained drive data becomes as shown in FIG. The characteristic has components in all bands like white noise. As the time axis waveform, a single waveform as shown in FIG. 7A is obtained.

The synthesis of the guitar sound has been described above. Finally, a supplementary description of a double tone sound such as a string ensemble will be given. A multi-tone tone such as a string ensemble is a tone composed of a plurality of bowed instrument sounds such as a violin, and each instrument is equivalent to one-fourth of the entire length of the string, as in the case of a guitar as described above. Even if the positions are driven, they overlap each other while interfering with each other, so that a clear dip does not occur in a specific component in the amplitude frequency spectrum of the string ensemble sound as shown in FIG. 9A.

[0029]

However, in the above-described conventional tone synthesizer, when the tone color is changed by controlling the number of delay stages N of the delay unit 508 and the value of the dip level data D, FIG. As shown in FIG. 8 (c), many musical tones such as guitar sounds have the highest level of the primary (f1) component.
As shown in (c), the level of the primary component of the transfer characteristic of the acyclic comb filter 512 greatly differs,
There has been a problem that even the sense of volume of the synthesized sound data changes.

Further, as shown in FIG. 9 (a), a double tone tone such as a string ensemble does not have a clear dip in the amplitude frequency spectrum. That is, when drive data is obtained with the number of delay stages N of the delay unit 508 as M / 4, FIG.
As shown in (b), peaks occur at f4, f8,.

When the driving data is used for synthesis, N
When = M / 4, the level of this peak component is reduced to a level corresponding to that of the original sound by the acyclic comb filter 512, so that a desired musical sound as shown in FIG. 9A can be obtained. For example, when N = M / 6, f
The peaks of f4, f8,.
Is reduced (6 dB down) by the acyclic comb filter 512, and the synthesized sound data has a specific component, that is, the inverse of the acyclic comb filter 512, as shown in FIG. Components corresponding to the value of N when the transfer function is convolved (f4, f8 when N = M / 4)
..) Had a problem that a peak was generated, which was not preferable in terms of hearing.

On the other hand, in order not to generate a peak as shown in FIG.
In the process of obtaining the drive data, a method is conceivable in which the convolution of the inverse transfer characteristic of the non-cyclic comb filter 512 is not performed, and only the convolution of the inverse transfer characteristic of the cyclic comb filter 507 is performed. In order to reproduce a string ensemble sound in which the inverse transfer characteristic of the comb filter 507 is to be convolved, it is necessary to perform synthesis using only the cyclic comb filter 507.

In other words, the non-recursive comb filter 51
If the filtering in step 2 is also performed, the original sound cannot be reproduced. Therefore, the non-cyclic comb filter 512 cannot be used for reproducing the original sound. As described above, there is a problem that it is not possible to realize a tone color change in accordance with a change in the driving position of the string.

The present invention solves the above-mentioned problems, and can use a conventional PCM-type tone generator circuit as a waveform generating means, suppress a change in loudness due to a change in timbre, and obtain a string ensemble sound. The present invention also provides a musical tone synthesizer capable of improving unnaturalness in audibility and reproducing a continuous change in timbre depending on a driving position even when reproducing a sound.

[0035]

In order to solve the above-mentioned problems, a musical sound synthesizing apparatus according to the present invention is characterized in that an arithmetic means generates volume level correction data according to the number of delay stages and dip level data, and an amplitude control means. Is characterized in that the volume level of the synthesized sound data is corrected using the volume level correction data.

As described above, the inconsistency in the volume of the synthesized sound data caused by the change in the tone color by controlling the number of delay stages and the dip level data can be kept constant in terms of audibility. Also, P
For the PCM data corresponding to the original sound of a natural musical instrument or the like generated by the CM data generating circuit, tone color change according to the number of delay stages of a delay unit in the non-cyclic comb filter, that is, drive position control of a resonance unit such as a string. In the case of realizing a timbre change according to, the inconsistency of the volume of the synthesized sound data is kept constant in terms of audibility.

As described above, in addition to the effects of the above-described solving means, a sound source circuit based on the conventional PCM method can be used as a waveform generating means before filtering. When the arithmetic means reproduces the original sound of the string ensemble (N in this case is assumed to be M / 4, where M is the number of delay stages of the delay unit in the cyclic comb filter), the dip level data is set to a value. When the synthesis processing is performed by setting the value to 0, and another tone color in which the driving position of the resonance section such as a string is controlled is obtained (N is other than M / 4), the synthesis processing is performed by setting the dip level data to a value other than 0. , And the value of N is M / 4
The dip level data is controlled so as to gradually increase from the value 0 as the distance from the distance increases.

As described above, the original sound of the string ensemble can be reproduced, and the timbre can be continuously changed centering on the original sound of the string ensemble in accordance with the change of the driving position of the resonance part such as a string.

The PCM data corresponding to the original sound of a natural musical instrument or the like generated by the PCM data generating circuit changes the tone color according to the number of delay stages N of the delay unit in the acyclic comb filter, that is, resonance of a string or the like. The tone color change according to the drive position control of the unit is continuously realized.

As described above, in addition to the effects of the above-described solving means, there is an advantage that a tone generator circuit based on the conventional PCM method can be used as a waveform generating means before filtering.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A musical tone synthesizer according to a first aspect of the present invention synthesizes musical tone data corresponding to various musical instrument sounds by a physical model method in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. A driving data generating means for generating driving data corresponding to an external force applied to a resonance section of the natural musical instrument; and a timbre change corresponding to a driving position of the resonance section with respect to the driving data from the driving data generation section. Filter processing means for outputting a processed signal, and calculating the volume level correction data which is a control parameter for controlling the output signal in accordance with the filter characteristic of the filter means. Calculating means for outputting the synthesized sound data by controlling the amplitude of the output signal of the filter means based on the volume level correction data from the calculating means; A structure in which a amplitude control means for correcting the volume level.

According to this configuration, the drive data generating means supplies the filter data with drive data corresponding to the force applied to the resonance portion (string or the like) of a natural instrument such as a guitar, and the filter means filters the drive data. Then, the timbre is changed in accordance with the drive position of the resonance part (string), and the calculating means calculates and outputs the volume level correction data according to the characteristics of the filter means, and the amplitude control means outputs the volume level correction data to the output. The sound volume level of the synthesized sound data is corrected based on the sound data.

According to a second aspect of the present invention, there is provided a musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model system in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. A driving data generating means for generating driving data corresponding to an external force applied to the section, and a closed loop circuit including at least a delay device, wherein the driving data from the driving data generating means is circulated, and the circulating data is converted into waveform data. A cyclic comb filter that takes out as a non-cyclic comb filter that performs a subtraction process between waveform data from the cyclic comb filter and waveform data obtained by delaying the waveform data for a predetermined time and level-adjusting the waveform data, and outputting the processed signal. A control parameter for controlling the output signal according to the filter characteristic of the non-recursive comb filter. Calculating means for calculating and outputting certain volume level correction data; and amplitude for correcting the volume level of the synthesized sound data by controlling the amplitude of the output signal of the acyclic comb filter based on the volume level correction data from the calculating means. And a control unit.

According to a third aspect of the present invention, there is provided a musical sound synthesizing apparatus, wherein the arithmetic means according to the second aspect includes a sound volume level correction data which is a control parameter as a filter characteristic according to a delay time in a non-cyclic comb filter. It is configured to calculate.

According to a fourth aspect of the present invention, there is provided a musical tone synthesizing apparatus, wherein the arithmetic means according to the second aspect includes, as a filter characteristic, a sound volume as a control parameter according to an adjustment level value on a delay path in a non-cyclic comb filter. It is configured to calculate the level correction data.

According to these configurations, the drive data generating means supplies the cyclic comb filter with drive data corresponding to the force applied to the resonance portion (string or the like) of a natural instrument such as a guitar, and the cyclic comb filter is driven. A cyclic waveform is generated by circulating data, and a non-recursive comb filter controls the delay time of a delay unit inside the filter to give a dip to a specific component (a component corresponding to the delay time N) of the periodic waveform. With this, the tone changes according to the driving position of the resonance part (string),
Further, the calculating means calculates and outputs the volume level correction data according to the characteristics of the non-cyclic comb filter, for example, the delay time and the dip level data (corresponding to the level adjusted on the delay path of the non-cyclic comb filter), The amplitude controller corrects the volume level of the synthesized sound data based on the output volume level correction data.

According to a fifth aspect of the present invention, there is provided a musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model method in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. P equivalent to
PCM data generating means for generating CM data;
Filtering means for performing a filtering process corresponding to a tone change according to the driving position of the resonance section of the natural musical instrument on the PCM data from the CM data generating means, and outputting a processing signal; and a filter characteristic of the filtering means In response to the,
Calculating means for calculating and outputting volume level correction data as a control parameter when controlling the output signal; and controlling the amplitude of the output signal of the filter means by the volume level correction data from the calculating means. An amplitude control unit for correcting the volume level of the synthesized sound data is provided.

According to this configuration, the tone data corresponding to the musical instrument original sound generated by the PCM data generating means is supplied to the filter means, and the filter means filters the tone data, and according to the driving position of the resonance part (string). The arithmetic means outputs the volume level correction data according to the characteristics of the filter means, and the amplitude control means corrects the volume level of the synthesized sound data based on the volume level correction data.

According to a sixth aspect of the present invention, there is provided a musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model method in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. P equivalent to
PCM data generating means for generating CM data;
A non-cyclic comb filter for performing a subtraction process between the PCM data from the CM data generating means and data obtained by delaying the PCM data by a predetermined time and adjusting the level, and outputting a processed signal; and filter characteristics of the non-cyclic comb filter Computing means for computing and outputting volume level correction data, which is a control parameter when controlling the output signal, and an output of the non-recursive comb filter based on the volume level correction data from the computing means. Amplitude control means for controlling the amplitude of the signal to correct the volume level of the synthesized sound data.

According to a seventh aspect of the present invention, there is provided a musical sound synthesizing apparatus, wherein the arithmetic means according to the sixth aspect is configured to convert the sound volume level correction data as a control parameter according to a delay time in a non-cyclic comb filter as a filter characteristic. It is configured to calculate.

In the musical sound synthesizer according to the eighth aspect, the arithmetic means according to the sixth aspect is configured such that the arithmetic means according to the sixth aspect controls a sound volume as a control parameter in accordance with an adjustment level value on a delay path in a non-cyclic comb filter. It is configured to calculate the level correction data.

According to these configurations, the musical tone data corresponding to the musical instrument original sound generated by the PCM data generating means is supplied to the non-cyclic comb filter, and the non-cyclic comb filter controls the delay time of the internal delay unit. By giving a dip to a specific component (a component corresponding to the delay time N) of the musical tone data, the tone is changed according to the driving position of the resonance section (string).
An arithmetic output is performed in accordance with the characteristics of the non-recursive comb filter, for example, delay time and dip level data, and the amplitude control means performs volume level correction of the synthesized sound data based on the volume level correction data.

According to a ninth aspect of the present invention, there is provided a musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model system in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. A driving data generating means for generating driving data corresponding to an external force applied to the section, and a closed loop circuit including at least a delay device, wherein the driving data from the driving data generating means is circulated, and the circulating data is converted into waveform data. And a subtraction process between the waveform data from the cyclic comb filter and the waveform data obtained by delaying the waveform data for a predetermined time and adjusting the level, and outputs the processed signal as desired synthesized sound data. A non-cyclic comb filter, and the non-cyclic comb filter according to a filter characteristic of the non-cyclic comb filter. Configuration to which an arithmetic means for calculating and outputting a dip level data is an adjustment parameter for the level adjustment of the delay path in the.

According to a tenth aspect of the present invention, in the musical sound synthesizer, the arithmetic means according to the ninth aspect calculates dip level data as an adjustment parameter according to a delay time in a non-cyclic comb filter as a filter characteristic. It is configured to

According to these configurations, the drive data generating means supplies drive data of a double tone system such as a string ensemble to the cyclic comb filter, and the cyclic comb filter circulates the drive data to generate a periodic waveform. The cyclic comb filter controls the delay time of the delay unit inside the filter and gives a dip to a specific component (a component corresponding to the delay time N) of the periodic waveform, thereby responding to the drive position of the resonance unit (string). The tone color is changed, and the calculating means calculates and outputs the dip level data according to the delay time, and adjusts the level on the delay path of the acyclic comb filter based on the dip level data. At this time, in order to reproduce the original sound of the string ensemble (assuming that N in this case is 1/4 of the number of delay stages M of the delay unit in the cyclic comb filter), the dip level data is synthesized as a value 0, and When obtaining another tone with the drive position of a resonance section such as a string controlled (N is not M / 4), the dip level data is synthesized as a value other than 0.

Further, the calculating means calculates and outputs the dip level data so as to gradually increase from the value 0 as N moves away from M / 4, and uses the dip level data to calculate the level on the delay path of the non-cyclic comb filter. Make adjustments.

According to a eleventh aspect of the present invention, there is provided a musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model method in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. PCM data generating means for generating PCM data equivalent to the above, subtracting the PCM data from the PCM data generating means and the data obtained by delaying the PCM data for a predetermined time and adjusting the level thereof, and subjecting the processed signal to a desired synthesis A non-cyclic comb filter to be output as sound data, and dip level data, which is an adjustment parameter at the time of the level adjustment on a delay path in the non-cyclic comb filter, according to a filter characteristic of the non-cyclic comb filter. And a calculating means for calculating and outputting the result.

According to a twelfth aspect of the present invention, the musical sound synthesizing device calculates the dip level data, which is an adjustment parameter, according to the delay time in the acyclic comb filter as a filter characteristic. It is configured to

According to these arrangements, the tone data corresponding to the original musical instrument generated by the PCM data generating means is supplied to the non-cyclic comb filter, and the non-cyclic comb filter controls the delay time of the internal delay unit. By giving a dip to a specific component (a component corresponding to the delay time N) of the musical tone data, the tone color is changed according to the driving position of the resonance part (string), and the arithmetic means converts the dip level data to the delay time. In accordance with the dip level data, the level is adjusted on the delay path of the non-recursive comb filter. At this time, in order to reproduce the original sound of the string ensemble (assuming that N in this case is 1/4 of the number of delay stages M of the delay unit in the cyclic comb filter), the dip level data is synthesized as a value 0, and When obtaining a different tone with the drive position of a resonance part such as a string controlled (N is not M / 4)
Combines the dip level data as a value other than 0. Further, the calculating means calculates and outputs the dip level data so as to gradually increase from the value 0 as N moves away from M / 4, and adjusts the level on the delay path of the non-recursive comb filter using the dip level data. .

Hereinafter, a tone synthesizing apparatus according to an embodiment of the present invention will be specifically described with reference to the drawings. (Embodiment 1) A tone synthesizer according to Embodiment 1 of the present invention will be described.

FIG. 1 is a block diagram showing the configuration of the musical sound synthesizer of the present embodiment. In FIG. 1, reference numeral 101 denotes a driving data generating circuit as driving data generating means for reading out driving data stored in a memory or the like in advance;
Is a delay unit for delaying data for a predetermined time, 103 is a low-pass filter, 104 and 109 are multipliers, 105 is an adder, 106 and 111 are delay control circuits for controlling the delay times of the delay units 102 and 108, and 110 is a subtraction. Container, 1
Reference numeral 07 denotes a cyclic comb filter which constitutes filter means including the delay unit 102, the low-pass filter 103, the multiplier 104, the adder 105, and the delay control circuit 106. Reference numeral 112 denotes a delay unit 108, a multiplier 109, a subtractor 110, and a delay unit. A non-recursive comb filter 113 constituting filter means integrating the control circuit 111; 113, a volume adjustment arithmetic circuit as arithmetic means for calculating and outputting the volume level correction data L from the number of delay stages N and the value of the dip level data D; Numeral 114 denotes a multiplier as amplitude control means for multiplying the waveform transmitted from the non-cyclic comb filter 112 by the volume level correction data L output from the volume adjustment operation circuit 113.

The drive data generation circuit 101 can be easily realized by using a read-only memory in which drive data is stored in advance and a well-known circuit such as a counter that increments a memory address by one according to a sampling clock SCK. The description of the internal configuration is omitted here.

Each of the delay units 102 and 108 has a read / write memory configured in a ring memory format, and reads / writes the address ADR output from the delay control circuits 106 and 111.

The operation of the tone synthesizer constructed as described above will be described below. First, in FIG. 1, based on KON and SCK, the driving data generation circuit 10
1 supplies drive data corresponding to a force applied to a resonance portion (a string or the like) of a natural musical instrument such as a guitar to the recursive comb filter 107.

When the supplied drive data circulates in the cyclic comb filter 107, as shown in FIG. 7 (b), the periodic waveforms W1, W3, W5.
Is generated. The high frequency band of the periodic waveform is cut off by the low-pass filter 103 during the circulation, and is attenuated by the multiplier 104 multiplied by a gain G (G is less than 1).

The waveforms W1, W2, W3, W4, W5,... Shown in FIG. 7B are output from the non-cyclic comb filter 112 by the filtering process in the non-cyclic comb filter 112. Acyclic comb filter 1
As shown in FIGS. 8 (a), 8 (b) and 8 (c), the transfer characteristics of No. 12 differ depending on the number N of delay stages and the dip level data D (resulting in a different timbre of synthesized sound data). The cyclic comb filter 107 and the non-cyclic comb filter 1
12 is a conventional cyclic comb filter 50 shown in FIG.
7. The same as the non-recursive comb filter 512 and performs the same operation.

The volume adjustment operation circuit 113 is realized by a microcomputer or the like, for example.
Twelve delay stages N and the values of the dip level data D are received, the volume level correction data L is calculated by arithmetic processing, and sent to the multiplier 114.

Here, since many musical tones including a guitar have a primary component whose level is higher than other harmonic components, the volume of desired synthesized sound data largely depends on the level of the primary component.

Therefore, if the relationship between the number of delay stages N and the dip level data D and the amplitude characteristic corresponding to the first-order component is expressed by a mathematical formula and the volume level correction data L is calculated based on the formula, at least the first-order component can be kept at a constant volume. The volume adjustment for keeping the sound will be performed, and for many musical instruments, this will have almost the same effect as the volume adjustment of the musical sound.

The number of delay stages N and the dip level data D,
In order to clarify the relationship between the amplitude characteristics corresponding to the first-order components, first, the transfer function H
When (w) is obtained, it becomes as shown in (Equation 3).

[0071]

(Equation 3)

Further, the amplitude characteristic of the non-recursive comb filter 112 can be obtained by taking the absolute value of H (w). This is shown in (Equation 4).

[0073]

(Equation 4)

Here, when the dip level data D is 0, the value of | H (w) | is 1 irrespective of the number of delay stages N from (Equation 4). If this time is considered as the reference sound volume, the sound volume level correction data L is represented by (Equation 5).

[0075]

(Equation 5)

In this case, the value stored in the volume adjustment table is determined based on the level of the primary component. However, some harmonics other than the primary one are more major depending on the musical tone. It is also conceivable to select a calculation formula based on the order level.

Further, by adjusting the individual adjustment parameter P for each musical tone in terms of auditory sensation as shown in (Equation 6), it is possible to make fine adjustments irrespective of the order, and this equation itself is further simplified. Things are also possible.

[0078]

(Equation 6)

As a result of such an operation, the volume level correction data L output from the volume adjustment arithmetic circuit 113 is multiplied by the waveform sent from the non-recursive comb filter 112 in the multiplier 114 to adjust the volume. After being applied,
Output as synthesized sound data.

It should be noted that the order of connection between the cyclic comb filter 107 and the non-cyclic comb filter 112 may be changed. Further, the delay unit 108 of the non-cyclic comb filter 112
And the order of connection of the multiplier 109 may be changed.

As described above, according to the first embodiment of the present invention, the sound volume adjustment data is calculated by the sound volume adjustment operation circuit 113 in accordance with the characteristics of the acyclic comb filter 112, that is, the number N of delay stages and the dip level data D. L is calculated and output, and the waveform transmitted from the non-recursive comb filter 112 is multiplied.

As described above, the non-recursive comb filter 112
It is possible to keep the volume level of the synthesized sound data constant irrespective of the change in the timbre based on the characteristic change of the sound data. (Embodiment 2) A tone synthesizer according to Embodiment 2 of the present invention will be described.

FIG. 2 is a block diagram showing the configuration of the musical sound synthesizer of this embodiment. In FIG. 2, reference numeral 201 denotes a PCM corresponding to an original sound of a natural musical instrument stored in a memory or the like in advance.
PCM as PCM data generating means for reading data
A data generation circuit; 202, a delay unit for delaying PCM data for a predetermined time; 203, a multiplier; 205, a delay unit 202
A delay control circuit that controls the delay time of
206 is a delay unit 202, a multiplier 203, a subtractor 204,
A non-recursive comb filter as filter means integrating the delay control circuit 205; 207, a sound volume adjustment operation circuit as operation means for calculating and outputting sound level correction data L from the number of delay stages N and the value of the dip level data D;
Is a multiplier as amplitude control means for multiplying the waveform transmitted from the non-cyclic comb filter 206 by the volume level correction data L output from the volume adjustment operation circuit 207.

The operation of the tone synthesizer constructed as described above will be described below. This tone synthesizer is obtained by replacing the drive data generating circuit 101 and the cyclic comb filter 107 of the tone synthesizer in the first embodiment with a PCM data generating circuit 201. The PCM data generation circuit 201 reads out the PCM data corresponding to the original sound of the natural musical instrument stored in advance at an address step width corresponding to the pitch data, and supplies the read PCM data to the non-cyclic comb filter 206.

The subsequent operation is the same as in the first embodiment. Note that the connection order of the delay unit 202 and the multiplier 203 of the non-cyclic comb filter 206 may be changed. As described above, according to the second embodiment of the present invention, volume level correction data L is calculated by volume control circuit 207 according to the characteristics of acyclic comb filter 206, that is, the number of delay stages N and dip level data D. The output is multiplied by the waveform transmitted from the non-recursive comb filter 206.

As described above, the non-recursive comb filter 206
It is possible to keep the volume level of the synthesized sound data constant irrespective of the change in the timbre based on the characteristic change of the sound data. In addition, PC
Since the timbre change based on the control of the characteristic of the non-cyclic comb filter 206 is performed on the PCM data generated by the M data generation circuit 201, the tone generator circuit based on the conventional PCM system generates the waveform before filtering. It can be used as a means. (Embodiment 3) A tone synthesizer according to Embodiment 3 of the present invention will be described.

FIG. 3 is a block diagram showing the configuration of the tone synthesizer of this embodiment. In FIG. 3, reference numeral 301 denotes a drive data generation circuit as drive data generation means for reading out drive data stored in a memory or the like in advance;
Is a delay unit for delaying data for a predetermined time, 303 is a low-pass filter, 304 and 309 are multipliers, 305 is an adder, 306 and 311 are delay control circuits for controlling the delay times of the delay units 302 and 308, and 310 is a subtraction. Bowl, 3
Reference numeral 07 denotes a cyclic comb filter including the delay unit 302, low-pass filter 303, multiplier 304, adder 305, and delay control circuit 306. Reference numeral 312 denotes a delay unit 308, multiplier 3
09, a subtractor 310, and a non-cyclic comb filter combining delay control circuits 311.
Is a dip level adjusting arithmetic circuit as arithmetic means for calculating and outputting the same from the value of the delay stage number N.

The drive data generation circuit 301 can be easily realized by using a read-only memory in which drive data is stored in advance and a well-known circuit such as a counter that increments a memory address by one according to a sampling clock SCK. The description of the internal configuration is omitted here.

The delay units 302 and 308 have read / write memories configured in a ring memory format, and read / write data from / to the address ADR output from the delay control circuits 306 and 311.

The operation of the tone synthesizer constructed as described above will be described below. This tone synthesizer is obtained by changing the volume adjustment operation circuit 113 of the tone synthesizer in the first embodiment to a dip level adjustment operation circuit 313 and further omitting the multiplier 114. Only the differences will be described.

As shown in FIG. 9 (a), a multitone musical tone such as a string ensemble does not have a clear dip in a specific component. 307 is obtained by convolution with the inverse transfer characteristic, and is stored in a read-only memory in the drive data generation circuit 301.

When reproducing synthesized sound data corresponding to an original sound such as a string ensemble, at the time of synthesis,
The same parameter value as the inverse transfer characteristic of the recursive comb filter 307 (for example, the high cutoff frequency of the low-pass filter 303 and the gain in the multiplier 304) is set, and the dip level data D of the non-recursive comb filter 312 is set to a value of 0. And perform the composition process.

At this time, a musical tone such as a violin, which normally forms a string ensemble sound, often drives the position of a string corresponding to about 1/4 to 1/8 of the entire length of the string. If the number of stages is set to, for example, 1/4, and this is set as the initial delay stage number N0, this N0 is expressed by (Equation 7).

[0094]

(Equation 7)

The dip level adjusting operation circuit 313 is realized by, for example, a microcomputer, and calculates the dip level data D from the value of the number of delay stages N of the non-recursive comb filter 312 by, for example, an operation such as Expression (8). Output to the multiplier 309.

[0096]

(Equation 8)

However, the range of N is in the range of M / 32 to M / 2. Further, P is an individual adjustment parameter, and it is also possible to set the variation range of the timbre for each musical tone. The variable range of P is naturally restricted by the variable range of D.

Thus, when the number of delay stages is the initial number of delay stages N0, the synthesized sound data corresponding to the original sound is reproduced. However, as the number of delay stages increases from the initial state, the value of the dip level data D increases. Thus, it is possible to achieve a desired change in timbre due to a difference in drive position.

It is to be noted that the connection order of the cyclic comb filter 307 and the non-cyclic comb filter 312 may be changed. Also, the delay unit 30 of the non-recursive comb filter 312
Even if the connection order of the multiplier 8 and the multiplier 309 is changed, no problem may occur.

As described above, according to the third embodiment of the present invention, in a musical instrument constituting a multitone musical tone such as a string ensemble, an initial delay corresponding to a position driving a resonance section such as a string. The value of the number of stages N0 is determined, and the dip level adjustment operation circuit 313 performs an operation such that the dip level data D gradually increases as the number of delay stages N moves away from the initial number of delay stages N0. D is a multiplied value in the multiplier 309 in the acyclic comb filter 312.

As described above, the original sound of the string ensemble can be reproduced, and the timbre can be continuously changed centering on the original sound of the string ensemble in accordance with the change of the driving position of the resonance part such as a string. (Embodiment 4) A tone synthesis apparatus according to Embodiment 4 of the present invention will be described.

FIG. 4 is a block diagram showing the configuration of the tone synthesizer of this embodiment. In FIG. 4, reference numeral 401 denotes a PCM corresponding to an original sound of a natural musical instrument stored in a memory or the like in advance.
PCM as PCM data generating means for reading data
A data generating circuit, 402, a delay unit for delaying PCM data for a predetermined time, 403, a multiplier, and 405, a delay unit 402
Delay control circuit that controls the delay time of
406 is a delay unit 402, a multiplier 403, a subtractor 404,
A non-cyclic comb filter combining delay control circuits 405,
Reference numeral 407 denotes a dip level adjustment arithmetic circuit as arithmetic means for arithmetically outputting the dip level data D from the value of the number of delay stages N.

The operation of the tone synthesizer constructed as described above will be described below. This tone synthesizer is obtained by replacing the circuit combining the drive data generation circuit 301 and the cyclic comb filter 307 of the tone synthesizer in the third embodiment with a PCM data generation circuit 401. The PCM data generation circuit 401 reads out PCM data corresponding to the original sound of the natural musical instrument stored in advance at an address step width corresponding to the pitch data, and supplies the read PCM data to the non-cyclic comb filter 406. The subsequent operation is the same as in the third embodiment.

It is to be noted that the connection order of delay device 402 and multiplier 403 of non-recursive comb filter 406 may be changed. As described above, according to the fourth embodiment of the present invention, in a musical instrument constituting a multitone musical tone such as a string ensemble, the initial delay stage number N0 corresponding to the position driving the resonance section such as a string is used. The value is determined, and the dip level adjustment operation circuit 407 performs an operation so that the dip level data D gradually increases as the delay stage number N moves away from the initial delay stage number N0. It is assumed that the value is a multiplied value in the multiplier 403 in the recursive comb filter 406.

As described above, the original sound of the string ensemble can be reproduced, and the timbre can be continuously changed centering on the original sound of the string ensemble in accordance with the change in the driving position of the resonance section such as a string.

Further, the PCM data generated by the PCM data generation circuit 401
Since the tone color control based on the characteristic change of step 06 is performed, the sound source circuit based on the conventional PCM method can be used as a waveform generating unit before filtering.

[0107]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, the driving data generating means supplies the filtering means with driving data corresponding to the force applied to the resonance portion (string or the like) of a natural musical instrument such as a guitar, and the filtering means is driven. The data is filtered to change the timbre according to the drive position of the resonating part (string), and the calculating means calculates and outputs the volume level correction data according to the characteristics of the filtering means, and the amplitude control means is output. The sound volume level of the synthesized sound data can be corrected based on the sound volume level correction data.

Therefore, a change in the sense of volume accompanying a change in timbre is suppressed, and when reproducing a string ensemble sound,
It is possible to improve unnaturalness in audibility and realize continuous change in timbre depending on the drive position.

According to the musical tone synthesizing apparatus of the present invention, the driving data generating means generates the driving data corresponding to the force applied to the resonance portion (string, etc.) of a natural musical instrument such as a guitar. To the recursive comb filter,
A cyclic comb filter circulates the driving data to generate a periodic waveform, and a non-cyclic comb filter controls the delay time of an internal delay unit to control a specific component (a component corresponding to the delay time N) of the periodic waveform. ), The tone is changed in accordance with the driving position of the resonance part (string), and the calculating means further converts the volume level correction data into the characteristics of the acyclic comb filter, such as delay time and dip level data ( (Corresponding to the level adjusted on the delay path of the non-cyclic comb filter), and the amplitude control means can perform the volume level correction of the synthesized sound data based on the output volume level correction data. .

Therefore, it is possible to keep the volume of the synthesized sound data constant in the change of the timbre controlled by the number of delay stages N and the dip level data D. As a result, it is possible to suppress a change in a sense of volume accompanying a change in timbre, to improve the unnaturalness in audibility when reproducing a string ensemble sound, and to realize a continuous change in timbre depending on a driving position. .

According to the musical sound synthesizer of the fifth aspect,
The tone data corresponding to the musical instrument original sound generated by the PCM data generating means is supplied to the filter means, and the filter means filters the tone data to change the timbre according to the driving position of the resonance part (string). The means calculates and outputs the sound volume level correction data according to the characteristics of the filter means, and the amplitude control means can correct the sound volume level of the synthesized sound data based on the sound volume level correction data.

For this reason, the conventional P
A tone generator circuit of the CM system can be used, which suppresses the change in the sense of volume due to the change in timbre, improves the unnaturalness in the sense of hearing when reproducing the string ensemble sound, and enables the continuous timbre of the timbre depending on the drive position. Change can be realized.

According to the musical tone synthesizing device of the sixth, seventh or eighth aspect, the musical tone data corresponding to the musical instrument original sound generated by the PCM data generating means is supplied to the non-recursive comb filter. The cyclic comb filter controls the delay time of the delay unit inside the filter and gives a dip to a specific component (a component corresponding to the delay time N) of the musical sound data, so that the dip corresponds to the drive position of the resonance unit (string). The timbre is changed, and the calculating means calculates and outputs the volume level correction data according to the characteristics of the acyclic comb filter, for example, the delay time and the dip level data, and the amplitude control means outputs the synthesized sound based on the volume level correction data. Data volume level correction can be performed.

Therefore, it is possible to keep the volume of the synthesized sound data constant in the timbre change by controlling the number of delay stages N and the dip level data D, and to utilize a conventional tone generator circuit based on the PCM method as a waveform generating means before filtering. can do.

As a result, it is possible to suppress a change in the sense of volume accompanying a change in timbre, and to reproduce a string ensemble sound.
It is possible to improve unnaturalness in audibility and realize continuous change in timbre depending on the drive position.

According to the ninth or tenth aspect of the present invention, the drive data generating means supplies drive data of a double tone system such as a string ensemble to the cyclic comb filter, and the cyclic comb filter generates the drive data. To generate a periodic waveform, and the non-recursive comb filter controls the delay time of the internal delay unit to give a dip to a specific component (a component corresponding to the delay time N) of the periodic waveform. The timbre is changed according to the driving position of the resonance unit (string), and the calculating means calculates and outputs the dip level data according to the delay time, and adjusts the level on the delay path of the non-recursive comb filter based on the dip level data. I do. At this time, in order to reproduce the original sound of the string ensemble (assuming that N in this case is 1/4 of the number of delay stages M of the delay unit in the cyclic comb filter), the dip level data is synthesized as a value 0, and To obtain another tone with the drive position of the resonance part such as a string controlled (N is other than M / 4),
The dip level data is synthesized as a value other than 0.

Further, the calculating means calculates and outputs the dip level data so as to gradually increase from the value 0 as N moves away from M / 4, and uses the dip level data to calculate the level on the delay path of the non-recursive comb filter. Adjustments can be made.

Therefore, the original sound of the string ensemble can be reproduced, and the timbre can be continuously changed centering on the original sound of the string ensemble in accordance with the change of the driving position of the resonance part such as a string.

As a result, it is possible to suppress a change in the sense of volume accompanying a change in timbre, and to reproduce a string ensemble sound.
Unnaturalness in hearing can be improved. According to the tone synthesizer according to claim 11 or 12,
The tone data corresponding to the musical instrument original sound generated by the PCM data generating means is supplied to a non-cyclic comb filter, and the non-cyclic comb filter controls the delay time of an internal delay unit to control a specific component (delay) of the musical sound data. By giving a dip to the component corresponding to the time N), the timbre is changed in accordance with the driving position of the resonance part (string), and the calculating means calculates and outputs the dip level data according to the delay time. The level adjustment on the delay path of the non-recursive comb filter is performed based on the data. At this time, in order to reproduce the original sound of the string ensemble (assuming that N in this case is 1/4 of the number of delay stages M of the delay unit in the cyclic comb filter),
When synthesizing the dip level data as the value 0 and obtaining another timbre in which the driving position of the resonance section such as a string is controlled (N
Is other than M / 4), the dip level data is synthesized as a value other than 0. Further, the calculating means calculates and outputs the dip level data so as to gradually increase from the value 0 as N moves away from M / 4, and adjusts the level on the delay path of the non-recursive comb filter using the dip level data. be able to.

Therefore, the original sound of the string ensemble can be reproduced, and the timbre can be continuously changed around the original sound of the string ensemble in accordance with the change of the driving position of the resonance part such as a string. Can be utilized as a waveform generating means before filtering.

As a result, it is possible to suppress a change in the sense of volume accompanying a change in timbre, and to reproduce a string ensemble sound.
It is possible to improve unnaturalness in audibility and realize continuous change in timbre depending on the drive position.

[Brief description of the drawings]

FIG. 1 is a block diagram of a musical sound synthesizer according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram of a musical sound synthesizer according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a musical sound synthesizer according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a musical sound synthesizer according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a musical sound synthesizer in a conventional example.

FIG. 6 is a circuit diagram of a delay control circuit.

FIG. 7 is a graph showing various characteristics of a guitar sound.

FIG. 8 is a transfer characteristic diagram of a non-recursive comb filter.

FIG. 9 is a graph showing various amplitude frequency spectra of a string ensemble sound.

[Explanation of symbols]

101, 301 Driving data generation circuit 107, 307 Cyclic comb filter 112, 206, 312, 406 Acyclic comb filter 113, 207 Volume adjustment operation circuit 114, 208 Multiplier 201, 401 PCM data generation circuit 313, 407 Dip level Adjustment operation circuit

Claims (12)

[Claims] 1. A musical tone synthesizer for synthesizing musical tone data corresponding to various musical instrument sounds by a physical model system in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. Drive data generating means for generating data; and filter means for performing a filter process corresponding to a tone change according to a drive position of the resonance section on the drive data from the drive data generating device, and outputting a processed signal. Calculating means for calculating and outputting volume level correction data, which is a control parameter for controlling the output signal, according to the filter characteristics of the filter means; and volume level correction data from the calculating means. Amplitude control means for controlling the amplitude of the output signal of the filter means to correct the volume level of the synthesized sound data. Synthesizer. 2. A musical tone synthesizer for synthesizing musical tone data corresponding to various musical instrument sounds by a physical model system in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. A drive corresponding to an external force applied to a resonance section of the natural musical instrument. A driving data generating means for generating data, a cyclic comb filter having at least a closed loop circuit including a delay device, and circulating the driving data from the driving data generating means and extracting data during circulating as waveform data; A non-cyclic comb filter that performs a subtraction process between the waveform data from the cyclic comb filter and the waveform data obtained by delaying the waveform data for a predetermined time and adjusting the level, and outputting a processed signal; and a filter for the non-cyclic comb filter. Calculates volume level correction data, which is a control parameter for controlling the output signal, according to the characteristics And a control means for controlling the amplitude of the output signal of the acyclic comb filter by the volume level correction data from the calculation means to correct the volume level of the synthesized sound data. Synthesizer. 3. The musical sound synthesizer according to claim 2, wherein the calculating means is configured to calculate volume level correction data as a control parameter according to a delay time in the non-cyclic comb filter as a filter characteristic. 4. The apparatus according to claim 2, wherein the calculating means is configured to calculate volume level correction data as a control parameter in accordance with an adjustment level value on a delay path in the non-cyclic comb filter as a filter characteristic. Musical sound synthesizer. 5. A musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model system which simulates a sounding mechanism of a natural musical instrument by an electronic circuit. Data generating means, and a PCM from the PCM data generating means.
Filtering means for performing a filtering process corresponding to a tone change according to a driving position of a resonance section of the natural musical instrument on the data, and outputting a processed signal; and an output signal corresponding to a filter characteristic of the filtering means. Calculating means for calculating and outputting volume level correction data, which is a control parameter for controlling the control means, and controlling the amplitude of the output signal of the filter means based on the volume level correction data from the calculating means. A tone synthesizing apparatus comprising: an amplitude control unit that corrects a volume level of a musical tone. 6. A musical tone synthesizer for synthesizing musical tone data corresponding to various musical instrument sounds by a physical model method in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. Data generating means, and a PCM from the PCM data generating means.
A non-recursive comb filter that performs subtraction processing on data and data obtained by delaying the PCM data by a predetermined time and adjusting the level, and outputs a processed signal, and an output signal corresponding to the filter characteristic of the non-cyclic comb filter. Calculating means for calculating and outputting volume level correction data, which is a control parameter when controlling with respect to, and controlling the amplitude of the output signal of the non-recursive comb filter with the volume level correction data from the calculating means. A tone synthesizer comprising: an amplitude controller for correcting a volume level of synthesized sound data. 7. The musical sound synthesizer according to claim 6, wherein the calculating means is configured to calculate volume level correction data as a control parameter according to a delay time in the non-cyclic comb filter as a filter characteristic. 8. The apparatus according to claim 6, wherein the calculating means is configured to calculate volume level correction data as a control parameter in accordance with an adjustment level value on a delay path in the non-cyclic comb filter as a filter characteristic. Musical sound synthesizer. 9. A musical sound synthesizer for synthesizing musical sound data corresponding to various musical instrument sounds by a physical model system in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. A driving data generating means for generating data, a cyclic comb filter having at least a closed loop circuit including a delay device, and circulating the driving data from the driving data generating means and extracting data during circulating as waveform data; A non-cyclic comb filter that performs a subtraction process between waveform data from the cyclic comb filter and waveform data obtained by delaying the waveform data for a predetermined time and adjusting the level, and outputting a processed signal as desired synthesized sound data; The level adjustment on a delay path in the non-recursive comb filter according to a filter characteristic of the recursive comb filter And a calculating means for calculating and outputting dip level data which is an adjustment parameter at the time of the tone synthesis. 10. The musical sound synthesizer according to claim 9, wherein the calculating means is configured to calculate dip level data as an adjustment parameter according to a delay time in the non-cyclic comb filter as a filter characteristic. 11. A musical tone synthesizer for synthesizing musical tone data corresponding to various musical instrument sounds by a physical model system in which a sounding mechanism of a natural musical instrument is simulated by an electronic circuit. Data generating means, and a PC from the PCM data generating means
A non-cyclic comb filter for performing a subtraction process between M data and data obtained by delaying the PCM data by a predetermined time and adjusting the level thereof, and outputting a processed signal as desired synthesized sound data; and filter characteristics of the non-cyclic comb filter And a calculating means for calculating and outputting dip level data, which is an adjustment parameter at the time of the level adjustment on the delay path in the non-cyclic comb filter. 12. The musical sound synthesizer according to claim 11, wherein the calculating means is configured to calculate dip level data as an adjustment parameter in accordance with a delay time in the non-cyclic comb filter as a filter characteristic.