JP3132037B2 - Sound source device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound source device used as a tone signal source in an electronic musical instrument and the like, and more particularly to a sound source device having an expanded voicing range.

[0002]

2. Description of the Related Art Conventionally, as a sound source device of this kind, the structure of a stringed instrument or a wind instrument is physically simulated by an electric circuit or the like, and the operation thereof is digitally simulated to synthesize a real and dynamic sound. There is known a so-called physical model sound source (for example, JP-A-63-40199).

[0003] In such a physical model sound source, the timbre is generally determined by the model musical instrument, and the timbre width is narrow. If you want to get a different tone, you have to change the model (or algorithm) itself. In this case, it is not possible to satisfy the general function of a conventionally known sound source of another method that can produce a relatively wide range of timbres by changing parameters, and it is possible to answer a user's need to change timbres in various ways. There was an inconvenience.

On the other hand, as sound sources of other known systems, those of the PCM system and the FM system are known. These sound sources can change the timbre over a much wider range than the physical model sound source by changing the parameters. However, sound sources of these PCM system and FM system and the like lack dynamic expression of sound as compared with physical model sound sources.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and provides a sound source device which is rich in dynamic sound expression and has a wider variable range of timbre. The purpose is to do.

[0006]

Means for Solving the Problems] To achieve the object, the sound source device of this invention, as shown in FIG. 1, the excitation and modulation specification means 1, the delay means as well as closed loop connection
The excitation signal generated by the signal generation means to the closed loop
A closed-loop sound source that generates a tone signal when input
Three or more sound sources 2-1, 2-2,... Each including at least one sound source other than the closed-loop sound source;
Is based on the tone specification signal, performance operation signal, and modulation signal.
As to form tone signals have, met modulation control means 3 for providing an output signal from these sound sources as the modulated signal to any of the sound source in accordance with the designation from said modulation specification means
A sound other than the closed loop sound source by the modulation designating means.
The output signal from the source specifies the modulation of the closed loop source.
The output signal from a sound source other than the closed loop sound source.
Of the excitation signal of the closed-loop sound source and the delay amount of the delay means.
And a device for modulating at least one of them.

[0007]

According to the above arrangement, it is possible to enrich the timbre by enabling the intermodulation of each sound source or various types of sound sources. In particular, if you connect the delay means in a closed loop
In both cases, the excitation signal generated by the excitation signal
A closed loop that generates a tone signal by inputting to a closed loop
Sound sources other than the loop sound source and the closed loop sound source
Also includes one comprising three or more sound sources, the goodness of the musical tone control signal input to the closed loop excitation in a configuration for modulating based on an output of another sound source, dynamic sound realistic is a feature of the closed loop excitation , And a tone with a change in timbre can be obtained. In this case, in addition to obtaining the original tone variation,
It is also possible to obtain a new tone.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows an overall configuration of a sound source device according to one embodiment of the present invention.

The musical instrument shown in FIG.
3. PCM-FM sound source PCM-FM (PCM-FM-1,
PCM-FM-2, ‥‥, PCM-FM-N), physical model sound source A (A-1, A-2, ‥‥,
A-M), physical model sound source B simulating a bowed instrument
(B-1, B-2, ‥‥, BL), the modulation matrix section 25,
A mixing unit 27 is provided.

The performance operator 21 is composed of, for example, a keyboard (keyboard), and according to the operation state of each key (key) on the keyboard, a key press (KON), a key release (KOFF), and a key touch (initial) are performed for each key. Key information representing touch, after touch, etc.).

The control unit 23 controls the PCM-FM sound source based on key information output from the performance operator 21 and tone color designation information output from tone color designation means (not shown) such as a tone color selection switch. Tone control information, for example, feedback coefficient FB, index (modulation coefficient) IDX,
Frequency information value FN, read mode MODE, waveform select WSEL, EG (envelope generator) parameter EGPAR, noise modulation coefficient NIDX, random modulation coefficient RIDX, random information time function FUNC, and tone control information for physical model sound source A For example, information on embouchure E, breath pressure P, frequency information value FNA and filter parameter FPAR, and tone control information for physical model sound source B such as bow pressure Fb and bow speed V
b, frequency information value FNB and filter parameter FP
AR1 and FPAR2 information and the like are created and supplied to each sound source.

3 to 5 show more detailed examples of the configuration of the PCM-FM sound source. As shown in FIG. 3, the PCM-FM sound source stores a waveform memory 31 storing various tone waveform PCM data, and reads out a desired tone waveform from the waveform memory 31 at a pitch corresponding to the frequency information value FN. A known PCM sound source (one kind of waveform reading sound source) including a phase generator 32 for generating the address information of the above, an envelope generator 33, and a multiplier 34 for giving an envelope to the musical sound waveform. An FM modulation circuit including a multiplier 35 and an adder 36 for feeding back the read musical tone waveform information to a read address and a multiplier 37 for biasing the read address in accordance with the index IDX is added. Therefore, this PCM-
The FM sound source does not use the FM input and the feedback coefficient FB, that is, if at least one of the index IDX and the modulation wave input MOD is 0 and the feedback coefficient FB is 0, the FM sound source operates as a normal waveform reading sound source.

In FIG. 3, a phase generator 32 receives a frequency information value FN and a read mode information M from a control unit 23 of FIG.
ODE is supplied, and the frequency information value FN is accumulated at a predetermined cycle. The read mode information MODE is stored in the waveform memory 3
The phase generator 32 specifies how to read the waveform from 1 as, for example, "read the attack waveform first, and then read the sustain waveform n times in a loop." The process is repeated until the number of times corresponding to the read mode information MODE overflows, and a value corresponding to the read mode information MODE is added to the accumulated value and output.

The adder 38 is for giving a fluctuation component to the tone waveform read out from the waveform memory 31, and adds randomness information RAN supplied from a noise generator shown in FIG. I do. Adder 3
Numeral 6 is for FM-modulating the read tone waveform, and adds the feedback component and the FM input component to the output of the adder 38. The waveform memory 31 outputs the musical tone waveform information WAVE using the waveform selection information WSEL provided from the control unit 23 in FIG. 2 and the added value output output from the adder 36 as read addresses. in this case,
The read address is, for example, the waveform select information WS
EL is an upper bit, read mode information MODE is a middle bit, and the output of the accumulated value of the phase generator 32 is added to adders 38 and 36.
Can be set so that the integer part of the value processed in (1) is the lower bit.

The envelope generator 33 generates an envelope waveform corresponding to the EG parameter EGPAR supplied from the control unit 23 in FIG. The musical tone waveform WAVE read from the waveform memory 31 is multiplied by the envelope waveform EG output from the envelope generator 33 by the multiplier 34, and is provided with an envelope, and is output as a musical tone waveform signal OUTPM.

In this PCM-FM sound source, the FM modulation coefficients FB and FB are output from the modulation wave input MOD and the amplitude modulation input AM output from the matrix section 25 in FIG.
The IDX and the tone waveform envelope EG are modulated to diversify sound quality changes.

FIG. 4 shows a configuration of a noise generator for generating randomness information RAN to be provided to the adder 38 of FIG. The noise generator of FIG.
1, a low-pass filter (LPF) 42, a modulation time function generator 43, multipliers 44 and 45, and an adder 46. The noise generator 41 generates pseudo white noise. The low-pass filter 42 gives a predetermined frequency characteristic to white noise output from the noise generator 41 (colors the white noise). The modulation time function generator 43 generates a time function selected by the random information time function information FUNC. The output of the low-pass filter 42 is the multiplier 4
4, the output of the modulation time function generator 43 is multiplied by the random modulation coefficient RANIDX by the multiplier 45, and then input to the adder 46. The output of the adder 46 Is randomness information R
The signal AN is supplied to the adder 38 shown in FIG.

FIG. 5 shows a specific example of the time function generator 43 for modulation. The low-frequency frequency number LFOFN, the initial phase θ, and the noise index NOISEIDX are supplied to the modulation time function generator 43 in FIG. 4 from the control unit 23 in FIG. 2 as the random information time function FUNC. In FIG. 5, a phase (address) generator 51 accumulates a low-frequency frequency number LFOFN at a predetermined cycle using the initial phase θ as an initial value. The accumulated value is added to the output of the low-pass filter 42 in FIG. 4 by the adder 52 and the value multiplied by the noise index NOISEIDX by the multiplier 53, and then the waveform memory 5 storing a predetermined function is stored.
4 is supplied as a read address. Here, the adder 52 adds a low-pass filter 4 to the output of the phase generator 51.
By mixing the outputs of No. 2 at a predetermined ratio NOISEIDX, it is used to give pitch fluctuation to the time function read from the waveform memory 54.

FIG. 6 shows a more detailed configuration example of the physical model sound source A (wind instrument model) of FIG. The frequency information value FNA corresponding to the pitch of the musical tone to be generated, the filter parameter FPAR corresponding to the shape of the resonance tube of the wind instrument, and the performance input in the wind instrument are supplied from the control unit 23 in FIG. Of the breath pressure P and the embouchure E corresponding to. Further, a frequency number modulation coefficient FMA, a breath pressure modulation coefficient PM, and an embouchure modulation coefficient EM are given from the modulation matrix unit 25 in FIG. The physical model sound source A in FIG. 6 adds an adder 60 and multipliers 61 and 62 to a known wind instrument model, and converts the frequency information value FNA, breath pressure P and embouchure E into the modulation coefficients FMA and PM. And EM, thereby diversifying the sound quality of the formed musical tones.

In FIG. 6, the outputs of the multipliers 61 and 62, ie, the modulated breath pressure P and the embouchure E
Are input to adders 63 and 64, respectively. The breath pressure P is a negative value, and the adder 63 outputs a differential pressure signal for displacing the lead of the mouthpiece by subtracting the breath pressure P from the output signal of the variable delay 65.
The adder 64 adds the embouchure E and the differential pressure signal and supplies the result to the nonlinear table 66 as a pressure signal. The non-linear table 66 simulates the amount of displacement of the lead with respect to the applied pressure, and has a predetermined input / output characteristic. Thus, the output of the non-linear table 66 becomes a signal representing the area of the air passage in the mouthpiece lead. The output of the non-linear table 66 is connected to one input of a multiplier 67. The differential pressure signal from the adder 63 is input to the other input side of the multiplier 67 via a sign inverter (a multiplier for multiplying by a coefficient -1) 66b.
Based on these two input signals, the output signal of the multiplier 67 becomes a signal representing the air flow velocity at the mouthpiece lead.

The output signal of the multiplier 67 is fed back to the adder 63 via the filter 68 and the variable delay 65. The filter 68 is a low-pass filter alone or a combination of a low-pass filter and a high-pass filter. The filter 68 receives a filter parameter FPAR such as a cutoff frequency or a resonance characteristic from the control unit 23. Frequency number delay time (FN-DEL
AY) The conversion table 69 converts the output of the adder 60, that is, the modulated frequency number FNA + FMA into delay time data corresponding thereto. The variable delay 65 receives the delay time data. Filter 6
8 simulates the shape of the resonance tube. Variable delay 6
Numeral 5 simulates a state in which an incident wave from the mouthpiece returns to the mouthpiece 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.

The signal output from the multiplier 67 is extracted as a tone waveform signal OUTA.

FIGS. 7 and 8 show a more detailed configuration example of the physical model sound source B (string instrument model) of FIG. For the physical model sound source B, a frequency information value FNB corresponding to the pitch of a musical tone to be generated and a filter for simulating the string end (point pressed by a bridge and a finger) of the bowed instrument are supplied from the control unit 23 in FIG. Parameter FPAR1, FPAR
2, and information on the bow pressure Fb and bow speed Vb corresponding to the performance input of the bowed musical instrument. FIG.
From the modulation matrix section 25 of
B, bow pressure modulation coefficient FbM and bow speed modulation coefficient VbM. This physical model sound source B adds an adder 81 and multipliers 71 and 72 to a known bowed instrument model, and converts the frequency information value FNB, bow pressure Fb and bow speed Vb into the modulation coefficients FMB, FbM and FbM. It is characterized in that the tone is modulated by VbM, thereby diversifying the sound quality of the musical tones formed.

In FIG. 7, adders 73a and 73b correspond to the bow points. The multipliers 74a and 74b correspond to the chord ends on both sides of the bow point. Adder 73a, variable delay 75
The closed loop consisting of a, the filter 76a and the multiplier 74a corresponds to the string on one side of the bow point, and the delay time of the closed loop corresponds to the resonance frequency of the string. Similarly, adder 73
The closed loop consisting of b, the variable delay 75b, the filter 76b, and the multiplier 74b corresponds to the string on the other side of the bow point. Reference numeral 77 denotes a nonlinear function generator. The nonlinear function generator 77 adds the output of the multiplier 71, that is, the modulated bow speed Vb, to the signal obtained by combining the outputs of the closed loops on both sides of the bow point with the adder 78 by the adder 79, Further, an output of the multiplier 72, that is, a signal obtained by multiplying the modulated bow pressure Fb by the multiplier 70 is input.

Referring to FIG. 8, a frequency number-delay time (FN-DELAY) conversion table 82 is provided for the output of the adder 81, that is, the modulated frequency number FN.
Two delay time data DLY1 and DLY2 are output based on B + FMB, and these are supplied to variable delays 75a and 75b in FIG. 7, respectively. In this case, the total delay time D
LY1 + DLY2 corresponds to the pitch of the musical tone to be generated, ie, the frequency number FNB + FMB, and the delay time D
The ratio between LY1 and DLY2 corresponds to the bow position, that is, the length of each string on both sides of the bow point.

In FIG. 7, the signal representing the vibration of the string is
The signal is extracted as a tone waveform signal OUTB at the output side of the adder 73b.

In FIG. 7, the bow pressure Fb and bow speed Vb may be modulated by addition.

FIG. 9 shows a more detailed configuration example of the modulation matrix section 25 of FIG. Modulation matrix section 25 in FIG.
The matrix information MAT and the bias BIAS (PMBIAS1-a,..., PM
BIASN-a, PMBIAS1-b, ‥‥, PMBIAS
Nb, ABIAS1-a, ‥‥, ABIASM-a, ABI
AS1-b, ‥‥, ABIASM-b, ABIAS1-c, ‥
‥, ABIASM-c, BBIAS1-a, ‥‥, BBIA
SL-a, BBIAS1-b, ‥‥, BBIASL-b, BB
IAS1-c, ‥‥, BBIASL-c) and sensitivity SEN
S (PMSENS1-a, ‥‥, PMSENSN-a, PM
SENS1-b, ‥‥, PMSENSN-b, ASENS1-
a, ‥‥, ASENSM-a, ASENS1-b, ‥‥, A
SENSM-b, ASENS1-c, ‥‥, ASENSM-c
, BSENS1-a, ‥‥, BSENSL-a, BSEN
S1-b, ‥‥, BSENSL-b, BSENS1-c, ‥
, BSENSL-c) as well as the sound source PCM-FM (PCM-FM-1, ‥) shown in FIG.
ＰＣ, PCM-FM-N), A (A-1, ‥‥, A-M), B
(B-1, ＰＭ, BL) output OUTPM (OUTPM1
, ‥‥, OUTPMN, OUTA1, ‥‥, OUTAM
, OUTB1,..., OUTBL), and the modulation information MOD (M (M) for each sound source) based on these input information.
OD1, ‥‥, MODN), AM (AM1, ‥‥, AM
N), EM (EM1, ‥‥, EMM), PM (PM1,
ＰＭ, PMM), FMA (FMA1, ‥‥, FMAM
), VbM (VbM1, ‥‥, VbML), FbM
(FbM1, ‥‥, FbML), FMB (FMB1, ‥
‥, FMBL) and supplies these modulation information to the respective sound sources.

In FIG. 9, the output OUTP of each sound source is shown.
M (OUTPM1, ‥‥, OUTPMN, OUTA1,
ＯＵＴ, OUTAM, OUTB1, ‥‥, OUTBL)
Is input to the switch matrix 91. The matrix information MAT input from the control unit 23 is also input. The matrix information MAT specifies "which input is to be connected to which output", whereby the switch matrix 91 selects and outputs one of the input signals to each output terminal. Each output of the switch matrix 91 is output to the modulation control information SENS from the control unit 23 in a multiplier and an adder, respectively.
And BIAS, and is supplied to each sound source as modulation information.

The mixing section 27 shown in FIG. 2 outputs the output OUTPM (OUTPM1,..., OUTPMN,
OUTA1, ‥‥, OUTAM, OUTB1, ‥‥, O
UTBL) is appropriately weighted and added (mixing)
Then, the result of the addition is output as a tone signal.

As described above, by using a plurality of types of sound sources and by inputting the output of one sound source to another sound source, it is possible to enrich the tone and obtain a new tone.

[0033]

FIGS. 10 to 16 show another embodiment of the present invention.

FIG. 10 shows the output of the physical model sound source 101 multiplied by the index envelope I (t) (amplitude modulation).
Waveform memory 1 in FM operator 102
An example in which the read address 03 is modulated, that is, an example in which the output signal of the FM operator 102 is frequency-modulated by the output of the physical model sound source 101 will be described. The output of the FM operator 102 is output as a tone signal after the amplitude envelope A (t) is given by the multiplier 104.

In FIG. 10, as the physical model sound source 101, the wind instrument model shown in FIG. 6 and the bowed instrument model shown in FIGS. 7 and 8 can be used. As the performance input, a bow speed and a bow pressure, or a breath pressure and an embouchure are supplied, respectively, according to a model to be used.
As the FM operator 102, besides a normal FM operator, the PCM-FM sound source shown in FIGS. 3 to 5 can be used. One or more FM operators 102 are used. The waveform memory 103 stores a sine wave or arbitrary wave table, similarly to the waveform memory 31 of FIG. The phase generator 105 is similar to the phase generator 32 of FIG. Note information may be given by frequency numbers FN, FNA, and FNB as in the case of each sound source described above.

FIG. 11 shows an example in which the performance input of the physical model sound source 112 is modulated by the output of the FM operator 111, contrary to the example shown in FIG. Here, the physical model sound source 11
2, a bowed instrument model is used, and its bow speed Vb is modulated. Note that the bow speed Vb is used together with the bow speed Vb.
The bow pressure Fb may be modulated instead of b. Further, a wind instrument model may be used as the physical model sound source 112.

In FIGS. 11 to 15, illustration of note information input is omitted.

FIG. 12 shows that the output signal of one sound source 121 is output through a delay circuit 122 and the other sound source 1
23 modulates the delay time of the delay circuit 122 with a signal obtained by multiplying the output of the sound source 23 by a predetermined index I,
21 shows an example in which the output of the FM receiver 21 is FM-modulated based on the output of another sound source 123. Here, physical model sound sources are used as the sound sources 121 and 123. These physical model sound sources may be of the same algorithm or different algorithms. Further, one of them can be a sound source other than the physical model sound source, for example, a waveform memory read sound source.

The sound source devices shown in FIGS. 10 to 12 can be used in various combinations by connecting them.

Although FIGS. 10 to 12 show an example in which the output of one sound source is frequency-modulated by the output of another sound source, the output may be amplitude-modulated (ring modulator). For example, in FIG. 10, the multiplier 104 multiplies the output of the sound source 101 in place of the amplitude envelope A (t).

FIG. 13 shows how the delay time of the delay circuit (variable delay) 131 in the bowed instrument model is compared with that of another sound source 132.
An example of modulating with the output of FIG. In order to modulate the delay time of the delay circuit 131, for example, a method of configuring the delay circuit 131 with a RAM and modulating the read address thereof, that is, the same method as applying vibrato to a musical tone can be used. As the sound source 132, a physical model sound source or an FM operator can be used.

In FIG. 13, WGN is a resonance circuit, which corresponds to a portion composed of the variable delay 65 and the filter 68 in FIG. 6 or a portion composed of the variable delays 75a and 75b and the filters 76a and 76b in FIG. 1
Reference numeral 33 denotes a non-linear excitation unit, which corresponds to a portion including the non-linear table 66, the adders 63 and 64 and the multiplier 67 in FIG. 6, or a portion including the non-linear function unit 77, the adders 78 and 79 and the multiplier 70 in FIG. I do. 134 is a multiplier for multiplying a predetermined coefficient.

FIGS. 14 to 16 show an example in which one physical model sound source is handled like an operator in the FM sound source.
Members common to those in FIG. 13 are denoted by the same reference numerals.

FIGS. 14 and 15 show examples of so-called cross feedback, in which FIG. 14 modulates the delay time with each other's output, and FIG. 15 modulates the performance input with each other's output. In FIG. 15, the physical model sound source 15
A wind instrument model as shown in FIG. 6 is used as each of the instruments 152, and the one that modulates the embouchure E with each other output simulates a single lead wind instrument well (single lead model).

FIG. 16 is a diagram in which a plurality of physical model sound sources are nested such that the output of the tone signal of the preceding stage is input as the modulation signal of the performance input of the next stage.

Each of the configurations shown in FIGS. 10 to 16 can be realized by appropriately setting information transmitted from the control unit 23 in the above-described embodiments shown in FIGS.

[Brief description of the drawings]

FIG. 1 is a claim correspondence diagram showing a configuration of the present invention.

FIG. 2 is a block circuit diagram showing a configuration of a sound source device according to one embodiment of the present invention.

FIG. 3 is a block circuit diagram showing a configuration of a main part of a specific example of a PCM-FM sound source in the sound source device of FIG. 2;

FIG. 4 is a block circuit diagram showing a configuration of a randomness information section in the PCM-FM sound source of FIG.

FIG. 5 is a block circuit diagram showing a configuration of a modulation time function generator in the randomness information section of FIG. 4;

6 is a block circuit diagram showing a configuration of a specific example of a physical model sound source A in the sound source device of FIG. 2;

7 is a block circuit diagram showing a configuration of a main part of a specific example of a physical model sound source B in the sound source device of FIG. 2;

8 is a block circuit diagram illustrating a configuration of a delay time data generation unit in the physical model sound source B of FIG. 7;

9 is a block circuit diagram showing a configuration of a specific example of a modulation matrix unit in the sound source device of FIG. 2;

FIG. 10 is a block circuit diagram showing a configuration of a sound source device according to a second embodiment of the present invention.

FIG. 11 is a block circuit diagram showing a configuration of a sound source device according to a third embodiment of the present invention.

FIG. 12 is a block circuit diagram showing a configuration of a sound source device according to a fourth embodiment of the present invention.

FIG. 13 is a block circuit diagram showing a configuration of a sound source device according to a fifth embodiment of the present invention.

FIG. 14 is a block circuit diagram showing a configuration of a sound source device according to a sixth embodiment of the present invention.

FIG. 15 is a block circuit diagram showing a configuration of a sound source device according to a seventh embodiment of the present invention.

FIG. 16 is a block circuit diagram showing a configuration of a sound source device according to an eighth embodiment of the present invention.

[Explanation of symbols]

1 Modulation designation means, 2-1 2-2, ‥‥ sound source, 3 modulation control means, 21 performance operators, 23 control section, 25 modulation matrix section, 27 mixing section, PCM-FM
-1, PCM-FM-2, ‥‥, PCM-FM-N PCM-
FM sound source, A-1, A-2, ‥‥, A-M, B-1, B-2, ‥
‥, BL Physical model sound source.

Continuation of the front page (56) References JP-A-1-101594 (JP, A) JP-A-2-85895 (JP, A) JP-A-59-168493 (JP, A) JP-A-3-78799 (JP) JP-A-62-71994 (JP, A) JP-A-3-100599 (JP, A) JP-A-4-161995 (JP, A) JP-B-63-42276 (JP, B2) (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 7/02 G10H 7/08

Claims (1)

(57) [Claims] An excitation signal generating means for connecting a modulation designating means and a delaying means in a closed loop.
Inputting the excitation signal generated from the closed loop to the closed loop
-Loop sound source for generating a tone signal by means of
Three or more sound sources each including at least one sound source other than the sound source
Wherein each sound source is a tone color designation signal, a performance operation signal,
And a modulation control means for generating a tone signal based on the modulation signal , and providing an output signal from these sound sources to the arbitrary sound source in accordance with the designation from the modulation designation means as the modulation signal. By the specified means
Output signal from a sound source other than the
Sound source other than the closed-loop sound source
The excitation signal of the closed loop sound source and the delay
Modulate at least one of the delay amounts of the extension means
Tone generator characterized by comprising: a stuff, a.