JPH09134171A - Sound generation indicating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce the generation phenomenon of a resonant sound which is seen on an acoustic musical instrument such as a piano. SOLUTION: A keyboard is scanned to detect whether or not a key is pressed (S1-S3) and when a key is pressed, the key code of the pressed key is stored in a free ch (S4). Then whether or not another key is pressed at this time is detected (S5) and when so, the degree of a resonant sound based upon the key code difference between the two pressed keys is read out and stored in a resonant sound area of a work RAM (S6-S8) and the ch number of the key which is pressed earlier is stored in the said resonant sound area while paired with the degree of the resonant sound (S9). Then a resonant sound based upon the stored resonant sound degree is generated, an envelope is added, and the resulting sound is generated (S10 and S11). Then the keyboard is scanned again and when key release is detected (S1-S3), the sound of the key code of the key release is ceased and the ch where the key code is stored is made free (S12 and S13). When the ch number is in the resonant sound area, the resonant sound corresponding to the ch number is ceased and the resonant sound degree is erased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound generation instruction device which reflects a phenomenon of resonance generated by string vibration, which is observed in a piano or the like.

[0002]

2. Description of the Related Art For example, in a piano, a key of F2 is strongly pressed while a key of C2 is pressed down gently.
When the key 2 is released, resonances corresponding to the pitches of C4 and C3 are clearly heard. This was caused by pressing the key of F2,
This is because the vibration of the third and sixth order modes of the string of F2 causes the resonance vibration of the fourth and eighth order modes of the string of C2.

[0003] However, it is impossible for a conventional sounding instruction device to generate a resonance sound due to the vibration of a string even in a product called an electronic piano.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sounding instruction device capable of reproducing a resonance sound generation phenomenon seen in an acoustic musical instrument such as a piano.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention detects the start of tone generation based on input tone generation instruction information, and determines the end of the tone generation based on the input mute instruction information. When detecting, the pronunciation recognition means for recognizing that the tone is being produced, and when the pronunciation recognizing means recognizes that the pronunciation is being produced, when the pronunciation instruction information is newly input, Resonance sound generation instruction means for instructing generation of a resonance sound based on both the sound generation instruction information corresponding to the musical sound that is recognized as being sounded and the newly input sound generation instruction information; While the resonance sound whose pronunciation is instructed by the pronunciation instructing means is being generated, the pronunciation of the musical tone related to the previously input pronunciation instruction information is recognized among the two pieces of the pronunciation instruction information related to the resonance sound and is input later. Said pronunciation When the mute instruction corresponding to the sound indication information is input, the sounding of the resonance sound is continued, and the pronunciation of the musical tone related to the sound input instruction information input later is recognized, and the sound emission instruction information input earlier is received. And a resonance sound muffling instructing unit that instructs muffling of the resonance sound when the muffling instruction corresponding to the above is input.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment in which the present invention is applied to an electronic piano will be described with reference to the drawings.

FIG. 1 shows the overall configuration of the first embodiment. Reference numeral 1 denotes a keyboard unit, and 2 denotes a key press detection and sound assignment circuit which detects a key press and a key release of the keyboard unit 1, assigns a pressed key to one of a plurality of sound assigned channels, and specifies the assigned pressed key. The key code to be output. A frequency number is read from the frequency number memory 7 corresponding to the key code, and the sine wave generation circuit 8 generates a fundamental wave having a frequency corresponding to the frequency number and a harmonic wave thereof using the frequency number.

Next, the corresponding fundamental wave and harmonic are multiplied by the harmonic coefficient read from the harmonic coefficient memory 9 in the multiplier 10, and then the accumulator 11
, And further accumulate them.

As a result, a musical sound waveform synthesized by the sine wave synthesis method is output.

Reference numeral 6 denotes a resonance order table memory (hereinafter referred to as resonance order memory). When two or more keys are depressed, data necessary for generating resonance to be described later is stored. The work RAM 5 is a work RAM for temporarily storing the key code of the pressed key, the above-described resonance order, and the like. 3 is a program ROM (read only memory, hereinafter RO)
M) 4 is a CPU (central control unit) controlled by the CPU 4.

Next, in order to add the envelope generated by the envelope generating circuit 12 to the musical tone waveform, a multiplier 13 accumulates the output of the accumulator 11 and the output of the envelope generating circuit, Then, after being converted into an analog signal in the D / A converter 14, a tone is generated from the speaker 16 via the amplifier 15.

Next, a vibration mode of two resonating strings and a generated resonance will be described in detail by taking an acoustic piano as an example.

When the key of the piano is depressed or the sustain pedal is operated, the damper which suppresses the vibration of the string is released, so that the resonance vibration is affected by the other vibrating strings. Get up. However, resonance occurs when the frequencies of the vibration modes of the two strings are equal. The above is described with reference to the specific example of FIG.

FIGS. 2 (a) and 2 (b) show the vibration modes of the piano C2 string and F2 string (hereinafter referred to as C2 string or F2 string) of the piano, respectively. The fundamental wavelength ratio is plotted at 4: 3.

The dotted lines indicate the fundamental vibration modes (corresponding to the fundamental waves of the C2 sound and the F2 sound). The solid line in FIG. 2A shows the fourth vibration mode of the string C2 (corresponding to the fourth harmonic), and the solid line in FIG. 2B shows the third vibration mode of the string F2 (corresponding to the third harmonic). Respectively.

As can be seen from FIG. 2, the quartic mode of the string C2 and the tertiary mode of the string F2 have the same oscillation frequency, and both strings resonate with each other.

The above example is the vibration mode of the lowest order common to both the strings of C2 and F2, but the vibration mode of a multiple of this order, for example, the eighth mode of the string of C2 and the sixth mode of the string of F2.
The second mode also has the same vibration frequency, and at this frequency both strings resonate.

Next, FIG. 3 (a) shows the C2 and F2 sounds of the acoustic piano (the key code difference between these two sounds is 5), the respective fundamental waves and the frequencies of the overtones. This corresponds to each vibration mode of the strings C2 and F2. As is clear from the figure, the fourth harmonic of the C2 sound and the third harmonic of the F2 sound have the same frequency (262 Hz, corresponding to C4), and the eighth harmonic of the C2 sound and the sixth harmonic of the F2 sound are also the same. It has a frequency (523 Hz, corresponding to C5).

Thus, the C2 sound and the F2 sound are common,
These harmonics are equal to the frequency components of the resonance produced by the strings C2 and F2.

FIG. 3B shows another combination, that is, a combination of the C2 sound and the G2 sound (the key code difference of these two sounds is 7). As in the above example, the strings of C2 and G2 are used. When resonance occurs, 196 Hz (corresponding to G3) corresponding to the third harmonic of the G2 sound and 392 Hz corresponding to the fourth harmonic of the G2 sound
A resonance having a component (corresponding to G4) is generated. Next, FIG. 4A shows a state in which the key of C2 is depressed gently,
This shows how the resonance sound of the string C2 is generated when the key 2 is strongly pressed for a short time. In this figure, the parentheses indicate the pitches of the harmonic components of the C2 and F2 sounds, and correspond to the harmonics in FIG. 3A. Of these, C
4 and C5 (FIG. 3A and FIG.
(* And △ in (a)) are common to the C2 and F2 sounds, and are shown at the pitch positions of C4 and C5 in the second bar of FIG. And the strings of F2 represent the components of the resonance sound actually generated.

The above description will be further described with reference to FIG. This figure corresponds to the note length of each note in FIG. 4A. The resonance sound of the string of C2 generated immediately after the key of F2 is pressed is masked by the F2 sound, but in the first bar. A clear resonance is heard with the release of the F2 key at the end,
Also, when the key C2 is released at the end of the two measures, the resonance sound is also muted.

As is apparent from the above description, when two keys are depressed, the frequency components of the resonance generated by the vibration of the strings corresponding to each of the keys are two-tone keys corresponding to the depressed keys. Determined by the code difference.

FIG. 5 is a diagram showing the relationship between the key code difference of two tones and the order of the resonance tone. Here, the order of the resonance tone means the lowest harmonic component common to the two tones and the large key code. This is the harmonic order as viewed from the other sound. For example, FIG.
In the case (a) of the C2 and F2 sounds (the key code difference of the two sounds is 5), the common lowest harmonic component (corresponding to the pitch of C4) is the third order of the F2 sound with the larger key code. Since it is an overtone, the resonance order is 3. Similarly, C in FIG.
In the case of two tones and G2 tone (key code difference of two tones), the lowest common harmonic range (corresponding to the pitch of G3) is the second harmonic of the G2 tone with the larger key code. , And the resonance order is 2.

From the above description, the resonance sound generated when two keys are pressed is one of the tones corresponding to each key.
It can be seen that the frequency obtained by multiplying the fundamental frequency of the tone with the larger key code by the resonance order is the fundamental frequency, and is composed of frequency components that are integer times (1, 2, 3,...) Times that.

Although the above-described resonance sound is obtained by multiplying the key code having the larger code number by the resonance sound order, the sound having the smaller key code may be used as a reference. Naturally, in that case, the resonance order changes. To give one example,
In the case of the C2 sound and the F2 sound in FIG. 3A, the resonance order for the key code difference 5 is 4, and the fundamental frequency (65.4 Hz) of the smaller C2 sound of the key code is multiplied by the resonance order 4. (262 Hz) becomes the fundamental frequency of the resonance sound.

Next, the operation of the first embodiment of the present invention will be described with reference to FIG.
To generate a musical sound waveform, it uses a sine wave synthesis method,
FIG. 6 shows a timing chart relating to the synthesis.

First, in FIG. 1, when a key on the keyboard 1 is depressed, the key code of the depressed key output from the key depression detection and sound assignment circuit 2 is stored in the frequency number memory 7.
The data of the frequency number R, which is proportional to the pitch frequency of the key code, is output from the memory 7.

Next, the data of the frequency number R enters the sine wave generation circuit 8.

This circuit comprises, for example, two accumulators as shown in FIG. 7 and a sine wave memory (not shown).

In the figure, data of a frequency number R is input to an accumulator 17 and a sampling clock CLK is input.
When accumulation is performed using 1, R, 2R, 3R,..., QR (where q is an integer of 1, 2, 3,...) Are output as shown in FIG.

Next, this output is input to an accumulator 18, and a clock CLK2 having a frequency of w times the clock CLK1 (where w is the total number of sine waves used for sine wave synthesis).
, The accumulator 18 outputs R, 2R, 3R,..., WR (1) with respect to the input data R of the accumulator 18 as shown in FIG. For input data 2R, 2R, 4R, 6R,..., W2R (2) are sequentially output. Generally, for human power data qR, qR, 2qR, 3qR,. Output.

Next, using the data shown in the above equations (1) to (3) as address signals, the above-mentioned sine wave memory is used to convert the harmonic data of 1 to w in the timing of one sampling cycle. Read.

As a result, (SinR, Sin2R, Sin3R,..., SinwR) and (Sin2R, Sin4R, Sin6R,..., Sinw2R) (Sin3R, Sin6R, Sin9R,. , Sinw3R) ... (SinqR, Sin2qR, Sin3qR, ..., SinwqR) Form of (4) Is obtained as an output of the sine wave generation circuit 8 (the sine wave in parentheses above corresponds to one sampling period).

In this equation (4), SinqR is calculated as shown in FIG.
As shown in (1), a fundamental wave obtained by reading the address value of the sine-wave memory at intervals of R, and Sin2qR is a second harmonic that is also successively transmitted at intervals of 2R. In addition, Si
n3qR is the third harmonic that follows at 3R intervals,
SinwqR represents the w-order harmonic that follows at the interval of wR.

Next, the harmonic coefficient memory 9 stores the harmonic coefficients α1, α2,
α3... αw are sequentially read out and multiplied by the above sine wave in the multiplier 10 to obtain α1SinqR, α2Sin2qR, α3Sin3q
R,... ΑwSinwqR are obtained.

Next, the accumulator 11 accumulates the values of the fundamental wave and the respective harmonics up to the w-th order.
In one cycle of one,

[0037]

(Equation 1)

Is obtained. This is based on sinusoidal synthesis.
This represents tone waveform data of one cycle of a sampling clock.

Equation (5) is the sampling clock CLK
1 and, for example, when q = 1,

[0040]

(Equation 2)

Is obtained as an output of the accumulator 11 as shown in FIG.

After that, the output of the accumulator 11 is added with an envelope corresponding to the velocity of the pressed key by an envelope generation circuit 12 and is converted into an analog signal by a D / A converter 14. Sound is output from a speaker 16 via a sample and hold circuit, a filter, and an amplifier 15.

The above is a case where only one key is depressed and no resonance is generated due to the vibration of the string. Next, according to the above-described principle of resonance, it is generated by depressing a plurality of keys. The operation of generating a resonance tone will be described with reference to the operation flowcharts of FIGS.

First, in step SI, the CPU 3 scans the keyboard. In the next step S2, it is determined from the key information whether or not the state of the keyboard has changed, and if YES, any key has been pressed or released, and the next step S2
Proceed to 3. In the case of NO, the process returns.

In step S3, it is determined whether or not the key is currently depressed. If YES, the flow advances to the next step S4.

In step S4, as shown in FIG. 10A, the key code of the above-mentioned pressed key is changed to a free channel in the key pressed area of the work RAM, for example, channel 1 (hereinafter, ch1).
(May be abbreviated as "."), And then proceeds to the next step S5.

In step S5, it is determined whether there is another key pressed before step S3. If NO, the process proceeds to step S11 without generating a resonance sound. YES
If so, the process proceeds to step S5 to enter the resonance sound generation process.

In step S4, the CPU 3 and the work RAM 5 calculate the key code difference between the two keys being pressed.

Next, in step S7, the resonance order corresponding to the key code difference is read from the resonance order memory 6.

Thereafter, the process proceeds to step S8, where the above-mentioned resonance order is stored in a free channel (ch1 in FIG. 10A) of the resonance area after the channel number n in the work RAM 5.

Further, in step S8, the assigned key number of another key, which is previously depressed and attenuated to reduce the envelope value, for example, ch0 in FIG. 10 (a).
Is stored in the resonance area. In this case, it is paired with the above-described resonance tone order (see ENV (abbreviation of envelope) small channel number in the figure).

Next, the process proceeds to step S10, which will be described with reference to the operation flowchart of FIG. In this case, in order to remove unnecessary harmonic (harmonic) components in order to synthesize a resonance, a process of setting all coefficients other than a coefficient of a multiple of the resonance order out of harmonics of a sound having a larger key code to 0 is performed. Do.

First, in step S20, the harmonic order n
(1, 2, 3,..., W) is set to 1. Next, x = n is set in step S21.

In the next steps S22 and S23, it is determined whether or not x is divisible by the resonance order k. That is, x =
The calculation of x−k is repeated until x ≦ 0. When x ≦ 0, the process proceeds to the next step 24.

In step S24, it is determined whether or not x = 0. If YES, the harmonic order n is a multiple of the resonance order k. Proceed to step S26. If NO, the harmonic coefficient αn (α1 in this case) is set to 0 (step S25) to prevent the nth harmonic component from becoming a resonance component.
Proceed to step S26. In step S26, the harmonic order n
11

Next, in step S27, it is determined whether or not n> w (w is the total number of harmonics). If NO, the process returns to step S21.

Such an operation is repeated until the determination in step S27 becomes YES, and the process returns if YES.

In step S11, the fundamental wave and each of the harmonics up to the w-th order are multiplied by the corresponding harmonic coefficient, then accumulated, and the sound is generated by adding an envelope corresponding to the key velocity.

In the case of resonance sound generation, the envelopes of two sounds generated by pressing a key are compared, and for example, a resonance sound envelope corresponding to the larger envelope is added to generate sound. Also, if there is an aftertouch function, it is possible to control the magnitude of the resonance sound.

Next, if the determination is NO in step S3, it means that the key has been released, and the process proceeds to step S12.

In step S12, the sound corresponding to the key code of the released key is muted, and in step S13, the key code in the key depression area of the work RAM is erased. As the method, for example, key codes 0, 1, 2,... 87 from the lowest sound A0 to the highest sound C8 are sequentially set.
When the key is released, a method such as writing 255 (FFH) into the work RAM instead of the conventional key code is used.

Next, in step S14, the assigned channel number corresponding to the key code of the released key is set to the work R
It is determined whether or not it is in the resonance sound area of AM5. If YES, the process proceeds to step S15 to mute the resonance sound corresponding to the channel number. For example, if the key code of ch0 in the key depression area is released and the channel number of ENV small in the resonance area is 0, which is the same number as ch0, the key code of the released key corresponds to Since the same number as the assigned channel is in the resonance area, in this case, the resonance is muted simultaneously with the key release.

Further, the process proceeds to step S16, where the order of the resonance in the resonance region and the channel number paired therewith are deleted. The above will be described as a specific example again with reference to FIG.

FIG. 4 shows a case in which the key F2 is pressed strongly and shortly after a while after the key C2 is gently pressed.
As shown in FIG. 10B, the key code 15 of the C2 sound is put into the channel ch0 of the number 0 in the key depression area of the work RAM (5 in FIG. 1), and the key code 20 of the F2 sound is set into the channel 1 of the same number Put it in ch1. C2 sound and F
Since the key code difference between the two tones is 5, a value of 3 is read from the resonance order memory, and this value is used as an empty channel in the resonance area after the channel number n of the work RAM (FIG. 10).
(B) in chn). At the same time, of the harmonic components of the F2 sound having the larger key code, the resonance sound composed of the third and sixth order components (corresponding to the * and △ marks in FIG. 4A) which are integral multiples of the third order. (The pitch is C4).

In this case, the envelope of the C2 sound is F
Since it is smaller than the envelope of the two sounds, the channel number 0 of the sound C2 is stored in pairs with the above-mentioned resonance order of 3. Thereafter, the F2 key is released by releasing the key of F2, and the key code (20) in the channel number 1 of F2 in the key depression area is erased. However, since the channel number of F2 is not written in the resonance area, the resonance is F2.
Continues ringing regardless of key release 2. After that, when C2 is released, the channel number 0 of C2 is in the resonance area, so that this channel number and the resonance order coupled thereto are deleted, and the resonance is also muted.

The operation of generating a resonance sound when a two-tone string vibrates has been described above. In an actual performance, three or more sounds are usually generated at the same time. In such a case, the sounds are divided into arbitrary combinations of two sounds, and a resonance is generated for each combination by the above-described method.

For example, with the key C2 being pressed gently,
Considering the case where the F2 and G2 notes are simultaneously pressed strongly and shortly, first consider a combination of the C2 note and the F2 note. From FIG. Equal components are generated, and for coarse matching between C2 sound and G2,
As shown in FIG. 3 (b), the resonance sound is G2 sound 2, 3,.
..Generate a component equal to the next harmonic.

Next, the second embodiment in which the present invention is applied to an electronic piano.
An embodiment will be described. FIG. 12 is an overall configuration diagram of the second embodiment, most of which is common to the first embodiment.

Reference numeral 21 denotes a keyboard portion, and reference numeral 22 denotes a key press detection and assignment circuit, which detects a key press and a key release of the keyboard portion 21, assigns a press key to one of a plurality of sounding channels, and assigns the assigned press key. Outputs the specified key code. Based on this key code, the waveform generation circuit 27 generates and outputs a musical tone waveform. The waveform generation circuit 27 is, for example, a PCM tone generator circuit that reads out waveform data stored in advance from a memory.

Reference numeral 26 denotes a resonance sound data buble memory (hereinafter referred to as resonance sound data memory) which stores data necessary for generating a resonance sound when two or more keys are being pressed. The work RAM 25 is a work RAM for temporarily storing a press key, a key code of a resonance sound, and the like. 23 is a program ROM
(Hereinafter simply referred to as ROM) is a CPU controlled by a program of 24.

Next, in order to add the envelope generated by the envelope generation circuit 28 to the musical tone waveform output from the waveform generation circuit 27, the multiplier 29
The output of the musical tone waveform is multiplied by the output of the envelope generation circuit 28, and thereafter, a tone is emitted from the speaker 32 via the D / A converter 30 and the amplifier 31.

The present invention can be implemented even if the waveform generation circuit 27 is a sound source circuit using a sawtooth wave or a rectangle.

Next, the operation of generating a resonance sound will be described.
In the above-described first embodiment, the resonance is generated using the resonance order determined by the key code difference between the two sounds. However, in the second embodiment, basically the same method is used. .

FIG. 13 is a diagram showing the relationship between the key code difference between two sounds and the resonance sound data, and corresponds to FIG. 5 of the first embodiment. Here, the resonance sound data is the difference between the key code corresponding to the lowest harmonic that is common to the two resonating sounds and the key code of the larger key code of the two sounds. For example, in the case of C2 (key code 15) and F2 (key code 20) in FIG. 3A, the key code difference is 5,
The common key code corresponding to the lowest harmonic is 39 of the key code of C4, which corresponds to the third harmonic of F2 with the larger key code. The difference 19 between it and the key code 20 of F2 becomes resonance sound data.

If one more example is added, C2 in FIG.
In the case of (key code 15) and G2 (key code 22), the key code difference is 7, but a common key code corresponding to the lowest harmonic is C2 corresponding to the second harmonic of G2.
3 of 34. Difference 1 between it and G2 key code 22
2 becomes resonance data.

As described above, the values of the resonance sound data for the key code differences 1 to 12 are obtained as shown in FIG.

Next, the operation of the second embodiment will be described.
In FIG. 12, first, when a key on the keyboard 21 is depressed, the key is output from a key depression detection and sound generation assignment circuit 22.
The key code of the pressed key is input to the waveform generation circuit 27. After generating a tone waveform having a fundamental frequency corresponding to the key code, the waveform generation circuit 27 multiplies the waveform by an envelope data output from an envelope generation circuit 28 in a multiplier 29. Thereafter, the multiplier 29
Is converted into an analog signal by the D / A converter 30, and a tone is generated from the speaker 32 via the amplifier 31.

Next, the operation of generating a resonance tone will be described with reference to the operation flowchart of FIG. 12 and FIG. First, in step S30, the CPU 23 scans the keyboard.

In the next step S31, it is determined from the key information whether or not the state of the keyboard has changed. If YES, one of the keys has been pressed or released, and the next step S32 Proceed to. In the case of NO, the process returns.

In step S32, it is determined whether or not the key is currently pressed. If YES, the flow advances to the next step S33.

In step S33, the key code of the above-described pressed key is stored in a free channel in the key pressed area of the work RAM (see ch1 in FIG. 15A), and the flow advances to the next step S34.

At step S34, it is determined whether or not there is another key pressed before step S31. If NO, the process proceeds to step S40 without generating a resonance sound. Y
If it is ES, the process proceeds to step S in order to enter the resonance sound generation process.
Proceed to 35.

In step S35, the CPU 23 and the work RAM 25 calculate the key code difference between the two keys being pressed.

Next, in step S 36, the resonance data corresponding to the key code difference is read from the resonance data memory 26.

Then, in step S37, the sum of the key code having the larger code number of the two resonating sounds and the resonance sound data obtained in step S36 is calculated. The value obtained as a result is a key code corresponding to the fundamental frequency of the resonance sound.

Next, in step S38, the key code of the above-mentioned resonance sound is set to an empty channel of the resonance sound area after the channel number n of the work RAM 25 (chn in FIG. 15A).
To memorize.

Further, in step S39, the assigned channel number of another key, for example, the number 0 of ch0 in FIG. To memorize. In this case, the key code is paired with the above-mentioned key code of the resonance sound (see the small channel number of ENV in FIG. 3). Next, step S
At 40, a musical tone is generated by adding an envelope as described in the first embodiment. Also, if there is an aftertouch function, the magnitude of the resonance sound can be controlled.

Next, if the determination in step S32 is NO, it means that a key has been released, and the flow advances to step S40.

At step S41, the templated sound is muted, and the flow advances to the next step S42.

In step S42, the key code of the released key in the key depression area of the work RAM is deleted.

Next, in step S32, the number of the assigned channel corresponding to the key code of the released key is
It is determined whether or not it is in the resonance sound area of AM25, and if NO, the process returns. If YES, the process proceeds to the next step S44.

In step S44, the resonance sound corresponding to the channel number is muted. For example, assuming that the key code of ch0 (channel 0) in the key depression area is released and the channel number of the BNV is small in the resonance area or is the same number 0 as ch0, the key code of the released key is In this case, the same number as the assigned channel is included in the resonance area, and in this case, the resonance is muted simultaneously with the key release.

Then, the process proceeds to a step S45, wherein the key code of the resonance sound in the resonance sound area and the channel number paired with the key code are deleted. As a further specific example, the case of FIG. 4 of the first embodiment will be described.

FIG. 4 shows a case where the key F2 is pressed strongly and shortly after a while after the key C2 is gently pressed.
As shown in FIG. 15 (b), the key code 15 of the C2 sound is put into the channel ch # of the number 0 in the key pressing area of the work RAM (25 in FIG. 12), and the key code 20 of the F2 sound is also the number 1 Channel ch1. C2
The key code difference between the sound and the F2 sound is 5, and the resonance data 19 corresponding to the value 5 is successively read from the resonance data memory (see FIG. 13). This and the key code F2
The value 39 obtained by adding the sound key code 20 is stored in a free channel (chn in FIG. 15B) in the common sound area after the channel number n in the work RAM. This value 39 is a key code corresponding to the fundamental frequency of the resonance sound, and a resonance sound equal to the pitch of C4 corresponding to this key code is generated. In this case, since the envelope of the sound C2 is smaller than the envelope of the sound F2, the channel number 0 of the sound C2 is changed to the key code (3
Store as a pair with 9).

Thereafter, the operation after the key release of F2 is almost the same as that of the first embodiment (only ch3 is different), and the description is omitted.

[0096]

According to the present invention, when it is recognized that a musical tone is being produced based on the inputted pronunciation instruction information, when the pronunciation instruction information is newly inputted, the tone being produced is replaced with the tone being produced. Along with instructing the generation of a resonance sound based on both the corresponding generation instruction information and the newly input pronunciation instruction information, of the two pieces of pronunciation instruction information related to the resonance sound being generated, When silencing instruction information corresponding to the sounding instruction information is newly input, the user is instructed to mute the resonance sound, so that the sound generation that can reproduce the phenomenon of generating the resonance sound seen in acoustic instruments such as pianos can be reproduced. An indicating device can be realized.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a string vibration mode.

FIG. 3 is a diagram showing a common overtone of two musical tones.

FIG. 4 is a diagram showing a resonance sound by a string of C2 and a string of F2.

FIG. 5 is a diagram illustrating a relationship between a key code difference between two sounds and a resonance sound order.

FIG. 6 is a timing chart of a sine wave synthesis method.

FIG. 7 is a diagram for explaining accumulation by two accumulators;

FIG. 8 is an explanatory diagram of a sine wave memory.

FIG. 9 is an operation flowchart mainly related to resonance sound in the first embodiment.

FIG. 10 is a configuration diagram of a work RAM according to the first embodiment.

FIG. 11 is an operation flowchart of step S10 in FIG. 9;

FIG. 12 is a diagram illustrating an overall configuration of a second embodiment of the present invention.

FIG. 13 is a diagram showing a relationship between a key code difference between two sounds and resonance sound data.

FIG. 14 is an operation flowchart mainly related to resonance in the second embodiment.

FIG. 15 is a configuration diagram of a work RAM according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Keyboard part 2 Key press detection and sound assignment circuit 3 CPU 4 Program ROM 5 Work RAM 6 Resonance sound order table memory 7 Frequency number memory 8 Sine wave generation circuit 9 Harmonic coefficient memory 10 Multiplier 11 Accumulator 12 Envelope Generation circuit 13 Multiplier 14 D / A converter 15 Amplifier 16 Speech force 17 Accumulator 18 Accumulator 21 Keyboard part 22 Key press detection and sound assignment circuit 23 CPU 24 Program ROM 25 Work RAM 26 Resonance sound data table Memory 27 Waveform generation circuit 28 Envelope generation circuit 29 Multiplier 30 D / A converter 31 Amplifier 32 Speech force

Claims (3)

[Claims] 1. A method for detecting the start of tone generation based on input tone generation instruction information and detecting the end of tone generation based on input mute instruction information to recognize that the tone is being generated. Recognizing means, when the pronunciation recognizing means recognizes that the sound is being produced, and when the pronunciation instruction information is newly input, the sound corresponding to the musical tone that is recognized as being produced. Instruction information and resonance sound generation instruction means for instructing the generation of a resonance sound based on both the newly input sound generation instruction information, while the resonance sound instructed by the resonance sound generation instruction means is sounding, Of the two pieces of the sounding instruction information related to the resonance sound, the sounding of the musical tone related to the previously input sounding instruction information is recognized, and the mute instruction corresponding to the sounding instruction information input later is input. in case of When the pronunciation of the note is continued, and the pronunciation of the musical tone related to the tone input instruction information input later is recognized, and the mute instruction corresponding to the tone input instruction information input earlier is input, the resonance tone is input. And a resonance sound muffling instruction means for instructing mute of the sound. 2. The sounding instruction information to be inputted includes pitch information indicating a pitch of the musical tone, and the resonance sound generating instruction means uses the pitch information included in each of the two sounding instruction information. 2. The sound generation instruction device according to claim 1, wherein the generation of a resonance sound having a pitch based on both of the two pitches indicated is specified. 3. The sounding instruction device according to claim 2, wherein said instruction means instructs the generation of said resonance having a pitch corresponding to a common overtone of said two pitches.