JP2001356769A - Electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument which can actualize resonant sound effect close to that of a live musical instrument. SOLUTION: This electronic musical instrument is equipped with a resonant sound generation part having a string resonant sound generation part 16, a hammer resonant sound generation part 15, and a damper noise generation part 17, and the string resonant sound generation part 16 generates a string resonant sound signal corresponding to the pitch of a pressed key, the hammer resonant sound generation part 15 generates a hammer resonant sound signal corresponding to the stepping-in depth of a damper pedal, and the damper noise generation part 17 generates a damper noise signal corresponding to the stepping of the damper pedal in damper-pedal ON timing. In response to the key depression of the keyboard 11 and the stepping of the damper pedal 12, a resonant sound composed of the string resonant sound and hammer resonant sound is outputted together with a direct sound corresponding to the pressed key and a resonant sound composed of damper noise corresponding to the stepping of the damper pedal is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument provided with a resonance sound generator having a string resonance sound generator, a hammer resonance sound generator, and a damper noise generator.

[0002]

2. Description of the Related Art In recent years, digitalization of electronic musical instruments has progressed,
For example, many products such as electronic pianos and electronic organs that output musical tones imitating live musical instrument sounds have been developed.
By the way, live musical instrument sounds are given various resonance effects due to the structure of the musical instrument itself. For example, in the case of piano sounds, not only the strings struck by striking but also the strings and soundboards that were not struck resonate and resonate inside the piano body, and when the damper pedal is turned on, the damper comes off the strings and the sound spreads. Increase. Several electronic musical instruments have been proposed to realize such effects. (For example, JP-A-63-193185, JP-A-64-91193)
A conventional electronic musical instrument will be described below.

FIG. 9 shows a configuration of a conventional electronic musical instrument. In FIG. 9, reference numeral 1 denotes a keyboard for designating musical tone information such as a tone pitch and volume, 2 a switch for designating ON / OFF of a resonance effect (for example, a sustain pedal or a damper pedal), and 3 a keyboard 1. And a CPU (Central Processing Unit) for detecting the state of the switch 2 and generating a control signal,
Is a tone signal generator for generating a tone signal in response to a control signal from the CPU 3, 5 is a resonance effect adder for adding a resonance effect to the output of the tone signal generator 4, and 6 is an amplifier for amplifying the output of the resonance effect adder. This is a sound system composed of an amplifier and a speaker that emits sounds as musical sounds.

The operation of the electronic musical instrument configured as described above will be described below.

When a key is pressed on the keyboard 1, the CPU 3
Is a key code data KC that detects key depression and indicates a pitch.
And touch data KT indicating the strength of key touch, and a key-on signal KON representing key press and key release information (KON = 1 at key press, KON = 0 at key release). The CPU 3 also detects the state of the switch 2, and outputs a state signal SON of the switch 2 when the state of the switch 2 changes.
The tone signal generator 4 outputs key code data KC, touch data KT, key-on signal KON,
And a tone signal corresponding to the state signal SON of the switch 2.

FIG. 10 shows a key-on signal KON and a switch 2
5 is an example of an envelope waveform of a tone signal output from the tone signal generator 4 in response to the state signal SON. For example, when the state signal SON of the switch 2 is off (SON = 0), the key-on signal KON turns off → on → off (KON
= 0 → 1 → 0), the envelope signal is E
It looks like 1. When the state signal SON of the switch 2 is on (SON = 1), the key-on signal KON is off.
When the signal changes from ON to OFF (KON = 0 → 1 → 0), the envelope signal becomes like E2. After key release (KON =
The envelope duration of 1 → 0) is the envelope shape E
The envelope shape E2 is much longer than the envelope shape E1. That is, when the switch 2 is on, the tone signal has a long lingering sound after the key is released.

When the state signal SON of the switch 2 output from the CPU 3 is turned on (SON =
In the case of 1), a resonance effect is added to the tone signal output from the tone signal generation unit 4, and in the off state, the tone signal output from the tone signal generation unit 4 is bypassed. When the tone signal is analog, a spring type reverb device or a delay device using a BBD delay element is added. When the tone signal is a digital signal, a digital filter and a delay circuit are used to add the resonance effect digitally. After that, a method of performing digital-to-analog conversion (hereinafter, referred to as DA conversion) is used.

[0008] The tone signal output from the resonance effect adding section is supplied to the sound system 6 comprising an amplifier and a speaker, and is emitted as a tone.

[0009]

However, in the above-described conventional configuration, the feeling of the spread created by the resonance of the strings and soundboard inside the piano body changes the envelope shape after key release in synchronization with the damper pedal on. In addition, there is a problem that the resonance effect can be qualitatively different from the resonance effect obtained with an acoustic piano only by adding a resonance effect using various reverb devices in synchronism with this, and merely expressing the resonance effect. Was.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electronic musical instrument capable of faithfully providing a resonance effect due to the structure of a live musical instrument.

[0011]

In order to achieve this object, an electronic musical instrument according to the present invention comprises a key-pressed key and a key-pressed key.
A control signal generating unit for generating a control signal indicating a key release timing and a state of a damper pedal; and a control signal indicating at least a pitch of a depressed key and a control signal indicating a key press / release timing among the control signals. An electronic musical instrument comprising: a direct sound generation unit that generates a sound signal; and a plurality of resonance sound generation units that generate a resonance sound signal in response to a control signal indicating at least a state of a damper pedal among the control signals, A string resonance sound generator that generates a string resonance sound signal;
A hammer resonance sound generating section for generating a hammer resonance sound, and a damper noise generation section for generating a damper noise signal are included. The string resonance sound generation section includes a string resonance sound signal corresponding to a pitch of a depressed key. The hammer resonance sound generator is configured to generate a hammer resonance sound signal corresponding to the depth of depression of the damper pedal, and the damper noise generator is configured to turn on the damper pedal when the damper pedal is turned on. And a resonance sound comprising a string resonance sound and a hammer resonance sound together with a direct sound corresponding to the key pressed and the key pressed in response to the depression of the damper pedal. And outputs a resonance sound composed of damper noise corresponding to depression of the damper pedal.

[0012]

According to this structure, not only a direct sound is output from the direct sound signal generating unit in accordance with the control signal output from the control signal generating unit, but also a string resonance sound generating unit, a hammer resonance sound generating unit, and a damper noise. By outputting the string resonance sound, the hammer resonance sound, and the damper noise from the resonance sound generation unit having the generation unit, it is possible to obtain a resonance effect very close to a live musical instrument.

[0013]

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

FIG. 1 shows the configuration of an electronic musical instrument according to an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a keyboard, 1
Reference numeral 2 denotes a damper pedal which outputs the amount of depression by AD conversion, 13
Is a CPU that detects a state of the keyboard 11 and the damper pedal 12 to generate a control signal, and 14 generates a direct sound signal (a direct sound: a sound of the struck string itself) according to a control signal from the CPU 13. Direct sound generator, 15 is CPU1
A hammer resonance sound generator 16 that generates a hammer resonance sound signal (hammer resonance sound: a sound in which an impact sound generated when a string hits a string and a hammer resonates with another string or a sound board) in response to the control signal from 3; A string resonance sound generation unit that generates a string resonance sound signal (string resonance sound: sound in which a natural vibration of a struck string resonates with another string) in accordance with a control signal from the CPU 13, and 17 is a timing of depressing a damper pedal. A damper noise generator 18 generates a damper noise signal (damper noise: noise generated when the damper is removed from the string), an adder 18, and a sound system 19 for amplifying an input signal and emitting sound.

FIG. 2 shows the internal structure of the direct sound generator 14. In FIG. 2, reference numeral 21 denotes a direct sound waveform selection unit for directly selecting a sound waveform based on pitch and touch strength information of a control signal from the CPU 13, and 22 denotes a read address width based on pitch information of the control signal from the CPU 13. Is a direct sound address data generator that generates a read address at the timing of key depression, 23 is a direct sound wave memory that stores a plurality of direct sound wave data corresponding to the pitch and the strength of touch, and 24 is A direct sound waveform reading unit that reads out a direct sound waveform based on information from the direct sound waveform selecting unit 21 and the direct sound address data generating unit 22. A control signal from the CPU 13 includes an envelope shape based on a pitch, a touch, and a damper pedal depression amount. The direct sound envelope generator 26, which determines the amplitude and generates an amplitude envelope signal at the timing of key depression, has a direct sound signal A multiplication unit that multiplies the envelope signal, 27 is a direct sound volume control unit that generates a volume control signal based on information on touch intensity among the control information from the CPU 13, and 28 is a multiplication unit that multiplies the volume control signal and the direct sound signal. .

FIG. 3 shows the internal configuration of the hammer resonance sound generator 15. In FIG. 3, reference numeral 31 denotes a hammer resonance sound waveform selection unit that selects a hammer resonance sound waveform based on information on the amount of depression of a damper pedal in the control signal from the CPU 13, and 32 denotes an address width based on pitch information in the control signal from the CPU 13. , And a hammer resonance sound address data generator 33 for generating a read address at the timing of key depression, a hammer resonance sound wave memory 34 for storing a plurality of hammer resonance sound wave data corresponding to the amount of depression of the damper pedal, 34 Is a hammer resonance sound waveform readout unit that reads out a hammer resonance sound waveform based on information from the hammer resonance sound waveform selection unit 31 and the hammer resonance sound address data generation unit 32;
Reference numeral 35 denotes the pitch, touch, or
A hammer resonance sound envelope generator that determines the envelope shape based on the amount of depression of the damper pedal and generates an amplitude envelope signal at the timing of key depression, a multiplier 36 multiplies the hammer resonance sound signal by the envelope signal, and 37 a CP
A hammer resonance sound volume control unit that generates a volume control signal based on the pitch and touch intensity information among the control information from U13;
Reference numeral 38 denotes a multiplication unit that multiplies the volume control signal and the hammer resonance sound signal.

FIG. 4 shows the internal structure of the string resonance sound generating section 16. In FIG. 4, reference numeral 41 denotes a string resonance sound waveform selection unit for selecting a string resonance sound waveform based on pitch information of the control signal from the CPU 13, and 42 determines an address width based on pitch information of the control signal from the CPU 13. A string resonance sound address data generation unit that generates a read address at the timing of key press, 43 is a string resonance sound waveform storage unit that stores a plurality of string resonance sound wave data corresponding to pitch, and 44 is a string resonance sound wave. A string resonance sound waveform readout unit that reads out a string resonance sound wave shape based on information from the shape selection unit 41 and the string resonance sound address data generation unit 42. A control signal from the CPU 13 includes a pitch, a touch, a stepping amount of a damper pedal, and a key press. A string resonance sound envelope generator for determining an envelope shape according to the number and generating an amplitude envelope signal at the timing of key depression. A multiplying unit for multiplying the loop signal; 47, a string resonance sound volume control unit for generating a volume control signal based on information on the strength of touch, the number of keys pressed, and the amount of depression of the damper pedal in the control information from the CPU 13; A multiplication unit that multiplies the string resonance sound signal.

FIG. 5 shows the internal configuration of the damper noise generator 17. In FIG. 5, reference numeral 52 denotes a damper noise address data generator that generates a read address at the timing of depressing the damper pedal, 53 denotes a damper noise waveform memory that stores one type of damper noise waveform data, and 54 denotes a damper noise address data generator 52. A damper noise waveform reading unit that reads a damper noise waveform based on information from the CPU 13; a damper noise envelope generator 55 that determines an envelope shape based on information on a damper pedal depressing speed among control signals from the CPU 13 and generates an amplitude envelope signal at the timing of depressing the damper pedal; 56 is a multiplier for multiplying the damper noise signal by the envelope signal, and 57 is a damper noise volume controller for generating a volume control signal based on information on the depressing speed of the damper pedal among the control information from the CPU 13. 58 is a multiplication unit for multiplying the volume control signal and Danpanoizu signal.

Here, the direct sound, hammer resonance sound, string resonance sound, and damper noise used in this specification will be described. FIG. 6 explains these.

The direct sound is a sound emitted by the struck string itself. The direct sound is an impact sound in which the hammer hits the string (here, called a hammer sound), and a pitch generated by the natural vibration of the string is clear. It consists of two components, a sound (here, called a string sound).

The hammer resonance sound is a sound in which the hammer resonance resonates with a soundboard or other strings, has no sense of pitch, and has a distinct tone when the damper pedal is turned on and off. In a piano, it can be heard remarkably in the treble range.

A string resonance sound is a sound in which a string sound resonates with another string, has a sense of pitch, and has different timbres depending on the tone range. When the damper pedal is on, the volume is the highest because the dampers of all the strings are released. However, even when the damper pedal is off, resonance occurs between each key press (the damper is released). The sound is produced at the volume and sound quality according to the pattern. On the piano, you can hear it in the mid and low range.

The damper noise is a sound emitted when all the dampers of the strings come off at the same time when the damper pedal is depressed, and is considered as one of the resonance sounds. The higher the pedal speed, the louder the volume.

The method of extracting these resonance sounds includes a method of recording a live musical instrument by using a special method such as muting a string, and a method of separating the sounds by computer processing.

The operation of the electronic musical instrument configured as described above will be described below.

When a key is depressed on the keyboard 11, the CP
U13 performs key press detection, and detects key code data KC indicating the pitch, touch data KT indicating the intensity of key touch, and
It outputs a key-on signal KON indicating key press and key release information and key press number data KN indicating the number of keys currently pressed. The CPU 13 also detects the state of the damper pedal 12, and outputs a damper pedal depth DD indicating the amount of depression of the damper pedal, a damper pedal on signal DON indicating on / off of the damper pedal, and a damper speed DS indicating the speed of depression. . The detection of the damper speed is obtained by measuring the time between two points (DD1, DD2) of the depth of the damper pedal. Further, the detection of the damper pedal on / off is obtained when the damper pedal exceeds or does not exceed a certain depth (DD3). However, DD in this case
1 · DD2 · DD3 is set to satisfy the following (Equation 1).

[0027]

(Equation 1)

The control signal output from the CPU 13 is sent to the direct sound generator 14, the hammer resonance sound generator 15, the string resonance sound generator 16, and the damper noise generator 17, respectively.

The direct sound waveform selector 21 of the direct sound generator 14
Selects a waveform to be read according to the key code data KC and the touch data KT output from the CPU 13,
It outputs the waveform selection data WS1. The direct sound address data generation unit 22 generates the address data AD1 of the equal temperament scale from the key code data KC output from the CPU 13, and outputs it at the timing of the key-on signal KON = 1. Here, as a method of determining the pitch of the musical tone, a method of changing the update speed of the address data and a method of changing the read width of the address data are conceivable. In this embodiment, either method may be used. Direct sound waveform storage unit 2
Reference numeral 3 stores a plurality of direct sound waveform data, and the direct sound waveform reading unit 24 includes the waveform selection data WS1 output from the direct sound waveform selecting unit 21 and the address data AD1 output from the direct sound address data generating unit 22. Reads the waveform data specified by.

Further, the direct sound envelope generating section 25
It generates an envelope signal for controlling the amplitude of the waveform as time passes. The envelope signal ED1 determined by the key code data KC and the touch data KT output from the CPU 13 is converted to a key-on signal KON = 1.
Output at the timing of. Here, in the conventional example, the envelope shape after KON = 0 is changed by the state signal SON of the switch 2 (FIG. 10), but in the present embodiment, it is changed stepwise according to the state of the damper pedal depth DD.

FIG. 7 shows an example of an envelope signal output from the direct sound envelope generator 25 in response to the key-on signal KON and the damper pedal depth DD. When the key-on signal KON changes from on to off (KON = 1 → 0) when the damper pedal is depressed (DD = MAX), the envelope signal ED1 becomes like E1. When the key-on signal KON changes from on to off (KON = 1 to 0) when the damper pedal is half depressed by half (DD = MAX / 2), the envelope signal ED1 becomes like E2. After key release (KON =
The slope of the envelope (1 → 0) is the envelope shape E1
And E2. In this way, by changing the slope of the envelope after key release in accordance with the amount of depression of the damper pedal, a performance expression close to that of a live musical instrument is possible.

The direct sound volume control unit 27 is provided with a CPU 1
3 outputs a volume control signal LD1 in accordance with the touch data KT output from the control unit 3.

The waveform data read from the direct sound waveform reading unit 24 is multiplied by the envelope signal ED1 and the volume control signal LD1 by the multiplication units 26 and 27, respectively, and output as the direct sound signal WD1.

Next, the hammer resonance sound waveform selector 31 of the hammer resonance sound generator 15 selects a waveform to be read according to the damper pedal depth DD output from the CPU 13, and outputs waveform selection data WS2. The hammer resonance sound address data generation unit 32 determines whether the key code data KC output from the CPU 13 is 1/8 scale ("half tone" on the keyboard is 1).
Address data A of 階 scale (25 cents)
D2 is created and output at the timing of the key-on signal KON = 1. The method of determining the pitch of the musical tone is the same as that for the direct sound. The hammer resonance sound waveform storage unit 33 stores a plurality of hammer resonance sound waveform data corresponding to the depth of the damper pedal, and the hammer resonance sound waveform reading unit 34 stores the waveform selection data output from the hammer resonance sound waveform selection unit 31. WS2 and the waveform data specified by the address data AD2 output from the hammer resonance sound address data generator 32 are read. That is, the hammer resonance sound waveform readout unit 34 selects a waveform in accordance with the amount of depression of the damper pedal at the moment of key depression, and reads out the waveform at a 1/8 scale that is gentler than equal temperament. This is because, as described above, the hammer resonance sound does not have a sense of pitch, and the timbre is clearly different when the damper pedal is turned on and off.

The hammer resonance sound envelope generator 3
Reference numeral 5 denotes an envelope signal for controlling the amplitude of the waveform as time passes. The envelope signal ED2 determined by the key code data KC, the touch data KT, and the damper pedal depth DD output from the CPU 13 is converted to a key-on signal KON. = 1. Regarding the inclination of the envelope after key release, unlike the case of direct sound, the shape of the envelope signal is not changed by each key release regardless of the on / off state of the damper pedal. However, at the timing when the damper pedal changes from on (DD ≠ 0) to off (DD = 0), the envelope of all the hammer resonance sounds being output is changed and attenuated rapidly. This is the hammer resonance sound that is generated when the key is pressed with the damper pedal off and is mainly transmitted to the "string without damper" and the "sound board", and is a "sound that cannot be muted by the damper". On the other hand, the hammer resonance sound generated when the key is depressed while the damper pedal is on is mainly the sound transmitted to "other strings from which the damper has been removed by the pedal".
It expresses the property that the sound is muted by the damper.

Further, the hammer resonance sound volume control unit 37
The volume control signal LD2 is output in accordance with the key code data KC and the touch data KT output from the PU 13. Unlike the case of the direct sound, the reason why the volume control is performed by the key code data KC is to express the above-described property that “the hammer resonance sound is remarkable in the high frequency range”.

The waveform data read from the hammer resonance sound waveform reading section 34 is multiplied by the envelope signal ED2 and the volume control signal LD2 by the multiplication sections 36 and 37, respectively, and output as the hammer resonance sound signal WD2.

Next, the string resonance sound waveform selection section 41 of the string resonance sound generation section 16 selects a waveform to be read according to the key code data KC output from the CPU 13, and outputs the waveform selection data WS3. String resonance sound address data generator 4
2 is the key code data KC output from the CPU 13
To generate the address data AD2 of the equal-tempered scale, and output it at the timing of the key-on signal KON = 1. The method of determining the pitch of the musical tone is the same as that for the direct sound. The string resonance sound waveform storage unit 43 stores a plurality of string resonance sound waveform data corresponding to a sound range, and a string resonance sound waveform readout unit 44.
Reads out the waveform data specified by the waveform selection data WS3 output from the string resonance sound waveform selection unit 41 and the address data AD3 output from the string resonance sound address data generation unit 42. That is, the string resonance sound waveform readout unit 4
No. 4 is different from the case of the hammer resonance sound, in which a waveform is selected according to the tone range, and the waveform is read out in the equal temperament scale. This is because, as described above, the string resonance sound has a sense of pitch, and the timbre differs depending on the tone range.

The string resonance sound envelope generator 45
Generates an envelope signal for controlling the amplitude of the waveform over time, and converts the envelope signal ED3 determined by the key code data KC and the touch data KT output from the CPU 13 into a key-on signal KON.
= 1. Regarding the slope of the envelope after key release, unlike the case of direct sound, the shape of the envelope signal is not changed by each key release, and all keys are released with the damper pedal off (DD = 0) or half pedal. Outputting at the key timing (timing at which key press data KN = 0) or at the timing when the damper pedal depth DD changes when all keys are released (key press data KN = 0) Change the envelope of all string resonance sounds.

FIG. 8 is an example of an envelope signal output from the string resonance sound envelope generator 45 in accordance with the key-on signal KON, the damper pedal depth DD, and the key depression number data KN. For simplicity, the case where two keys are played is described. In FIG. 8, ED3 (1) is an envelope signal of a string resonance sound generated by the key-on signal KON (1), and ED3 (2) is a key-on signal KON.
This is an envelope signal of the string resonance sound generated by (2).

When the key-on signal KON (1) is released,
When ON (2) is in the key pressed state, the damper pedal is turned off (DD
= MAX → 0) even if the envelope signal ED3
(1) ED3 (2) does not change (state (A)). The envelope signals ED3 (1) and ED3 (2) both attenuate rapidly at the timing when the key-on signal KON (2) is released (that is, at the timing when the key depression number data KN = 0) (state (B)). . However, even if the key-on signals KON (1) and KON (2) are both released and the key depression number data KN = 0, the damper pedal is on (D
D = MAX), the envelope signal ED3 (1)
ED3 (2) does not change (state (C)). At the timing of the damper pedal off (DD = MAX → 0), both the envelope signals ED3 (1) and ED3 (2) rapidly attenuate (state (D)).

By the operation of these envelope signals,
Even if a key is released, as long as the damper of the other key is released, the string resonance sound of that key will continue to sound, which is consistent with the phenomenon that occurs with live musical instruments. Note that the envelope inclination after key release changes according to the amount of depression of the damper pedal, as in the case of direct sound. For example, in FIG. 8, in the state (B) and the state (D), the state of the half pedal in which the damper pedal is half depressed (DD = MAX)
/ 2), the slope of the envelope will be gentler than that represented in FIG.

The string resonance sound volume control unit 47 includes a CPU
Touch data KT / key press data K output from 13
N · Volume control signal LD according to damper pedal depth DD
3 is output. The reason why the volume control is performed by the key depression number data KN and the damper pedal depth DD is as described above. "The string resonance sound has the highest volume because the dampers of all the strings are released when the damper pedal is on, but the damper pedal is off. However, since the resonance occurs between the key presses (the damper is out of position), the sound is generated at a volume corresponding to the number of key presses. " The volume control based on the key depression number data KN and the damper pedal depth DD is performed, for example, using a volume control table shown in (Table 1).

[0044]

[Table 1]

As shown in Table 1, when the damper pedal is not depressed, the volume is controlled according to the number of key depressions KN, and when the damper pedal is depressed, the volume is controlled according to the damper pedal depth DD. To control the volume. This volume control is performed for all the string resonance sounds that are sounding if there is a change in the key depression number data KN and the damper pedal depth DD. The volume change at that time is not immediately changed to the value of (Table 1), but is changed with a certain time, so as to gradually approach the value of (Table 1). The speed of the temporal volume change is different for the increase and decrease of the volume, and the speed of the decrease is set faster than the speed of the increase. This is because, for example, the damper pedal is depressed during sounding, the damper is released, the string resonance sound spreads to other strings, and the volume increases gradually, whereas the damper pedal is released during sounding and the pressure is increased. This is because the strings other than the key are muted and the volume decreases rapidly.

The waveform data read from the string resonance sound waveform reading section 44 is multiplied by the envelope signal ED3 and the volume control signal LD3 by the multipliers 46 and 47, respectively, and is output as a string resonance sound signal WD3.

Next, the damper noise address data generator 52 of the damper noise generator 17 outputs one type of address data AD4 at the timing of the damper pedal ON signal DON = 1 output from the CPU 13. The damper noise waveform storage unit 53 stores one type of damper noise waveform data, and the damper noise waveform read unit 54 reads the waveform data based on the address data AD4 output from the damper noise address data generation unit 52.

The damper noise envelope generator 5
5 generates an envelope signal for controlling the amplitude of the waveform as time passes, and outputs an envelope signal ED4 determined by the damper speed DS output from the CPU 13 at the timing of the damper pedal-on signal DON = 1. Release the pedal (DON =
0) rapidly attenuates.

Further, the damper noise volume control section 57
A volume control signal LD4 is output according to the damper speed DS output from the PU13. The reason why the volume control is performed by the damper speed DS is to express the above-described property that "the higher the speed at which the pedal is depressed, the higher the volume".

The waveform data read from the damper noise waveform reading section 54 is multiplied by the envelope signal ED4 and the volume control signal LD4 by the multiplication sections 56 and 58, respectively, and is output as a damper noise signal WD4.

The direct sound signal WD1 output from the direct sound generator 14, the hammer resonance sound signal WD2 output from the hammer resonance sound generator 15, the string resonance sound signal WD3 output from the string resonance sound generator 16, and the damper noise. The damper noise signal WD4 output from the generator 17 is mixed by the adder 18 and emitted by the sound system 19 as a musical tone.

As described above, according to the present embodiment, in addition to the direct sound generator 14, the hammer resonance sound generator 15, the string resonance sound generator 16, and the damper noise generator 17 are provided, and each of them is provided in a separate system. By controlling, a unique resonance effect of a live musical instrument (particularly a piano) can be expressed, and a rich sense of expansion and a sense of depth can be realized. Further, it is possible to express the difference in tone and sound between the on and off of the damper pedal, which is important in a piano.

In this embodiment, for the sake of simplicity, it is assumed that both the direct sound and the resonance sound are monaural. However, all the waveforms of L and R have two types each, and two channels are simultaneously generated to generate a stereo sound. It may be pronounced. In that case, a richer feeling of depth and depth can be obtained. Of course, only a part of the resonance sound or only the direct sound can be stereo. Further, a chorus effect may be added by changing the pitch of both stereo channels to enhance the sense of expansion. This is particularly effective when a sense of fluctuation or a sense of spread is lost from the original sound due to data compression or the like.

In this embodiment, the number of simultaneous sounds of the direct sound and each resonance sound and the priority of the sounding channels are not described. However, the number of simultaneous sounds of the hammer resonance sound and the damper noise is limited to one or two channels. Alternatively, the resonance priority of the string resonance sound may be lower than that of the direct sound. Further, the damper noise sound may be limited to be emitted only when the sound is not directly emitted. If you do this,
The channels for a plurality of sounds can be used effectively, and a large number of polys (number of tones of musical sounds) can be obtained with a small system.

In the present embodiment, the sound range of the hammer resonance is not particularly limited, but may be limited to only the high range. This is because the hammer resonance sound hardly contributes to the musical tone in the middle and low frequency ranges. By doing so, the sound channel can be used more effectively.

Further, in this embodiment, the waveform of the hammer resonance sound is selected according to the depth of the damper pedal. However, the waveform may be selected in accordance with the range or the strength of keyboard touch. Thereby, a resonance effect closer to that of a live musical instrument can be obtained. Further, the scale of the hammer resonance sound is set to 1/8 scale, but another scale closer to the actual musical instrument may be adopted.

Further, in this embodiment, the string resonance sound is selected in accordance with the tone range, but the waveform may be selected in accordance with the strength of the keyboard touch, and further, in accordance with the key depression pattern. A waveform may be selected. Thereby, a resonance effect closer to that of a live musical instrument can be obtained.

Further, in this embodiment, the damper noise is one type of waveform, but a plurality of waveforms corresponding to the damper speed may be stored and selected by the damper speed DS. As a result, a damper noise sound closer to a live musical instrument can be expressed.

In this embodiment, the slope of the envelope after the key release of the string resonance sound is different from the case of the direct sound with respect to the slope of the envelope after the key release, and the shape of the envelope signal is changed by each key release. Without performing this operation, the timing at which all keys are released when the damper pedal is off (DD = 0) or the state of the half pedal (the timing at which the key press count data KN = 0), or the state where all keys are released ( It is assumed that the envelope of all the string resonance sounds being output is changed at the timing when the damper pedal depth DD changes in the state of the key depression number data KN = 0, but the operation is the same as the direct sound (the damper pedal is off or the half pedal is turned off). At this time, the envelope signal is changed by each key release). In this case, the resonance effect is slightly different from that of a live instrument, but there are advantages such as simplification of the system and effective use of channels.

In this embodiment, the case where three kinds of resonance sounds are used has been shown. However, if only one or two kinds of resonance sounds are used, a relatively simple system can be realized. If a resonance sound of the type is used, a resonance effect closer to that of a live musical instrument can be obtained.

In this embodiment, for simplicity of explanation, 1 is used.
Although an example of sound generation of two or more tones is described, it goes without saying that each part operates in a time-division manner for polyphonic (multiple sound) output.

[0062]

As described above, the present invention provides a control signal generating section for generating a control signal indicating the pitch of a depressed key, the timing of depressing and releasing a key, and the state of a damper pedal. A direct sound generator that generates a direct sound signal in accordance with a control signal indicating at least the pitch of a depressed key and timing of key press / release, and a control signal indicating at least a control signal indicating a state of a damper pedal among the control signals An electronic musical instrument comprising a plurality of resonance sound generating sections for generating a resonance sound signal, wherein the plurality of resonance sound generation sections include a string resonance sound generation section for generating a string resonance sound signal, and a hammer resonance sound. A hammer resonance sound generator that generates a damper noise signal that generates a damper noise signal is included, and the string resonance sound generator generates a string resonance sound signal that corresponds to the pitch of a depressed key. Configured to
The hammer resonance sound generating unit is configured to generate a hammer resonance sound signal corresponding to a depression depth of a damper pedal, and the damper noise generation unit generates a damper noise signal corresponding to the depression of the damper pedal at a timing of turning on the damper pedal. And a resonance sound consisting of a string resonance sound and a hammer resonance sound together with a direct sound corresponding to the key pressed in response to the depression of the key and the depression of the damper pedal, and the depression of the damper pedal. The resonance signal is configured to output a resonance sound composed of a damper noise corresponding to the above. According to the control signal output from the control signal generation unit, not only the direct sound is output from the direct sound signal generation unit, but also the string From a resonance sound generator having a resonance sound generator, a hammer resonance sound generator, and a damper noise generator, a string resonance sound, a hammer resonance sound, By Npanoizu is outputted, it is possible to obtain a very close resonance effect in acoustic instruments, there is an excellent effect that it is possible to realize a rich sense of expanse and depth feeling.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is an internal configuration diagram of a direct sound generating unit according to an embodiment of the present invention.

FIG. 3 is an internal configuration diagram of a hammer resonance sound generating unit according to the embodiment of the present invention.

FIG. 4 is an internal configuration diagram of a string resonance sound generating unit according to the embodiment of the present invention.

FIG. 5 is an internal configuration diagram of a damper noise generating unit according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of direct sound, hammer resonance sound, string resonance sound, and damper noise in the embodiment of the present invention.

FIG. 7 is an envelope signal diagram generated from a direct sound envelope generating unit according to the embodiment of the present invention.

FIG. 8 is an envelope signal diagram generated from a string resonance sound envelope generating unit according to the embodiment of the present invention.

FIG. 9 is a configuration diagram of a conventional electronic musical instrument.

FIG. 10 is an envelope waveform diagram of a tone generated from a tone signal generator in a conventional electronic musical instrument.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Keyboard 12 Damper pedal 13 CPU 14 Direct sound generation part 15 Hammer resonance sound generation part 16 String resonance sound generation part 17 Damper noise generation part 18 Addition part 19 Sound system 21 Direct sound waveform selection part 22 Direct sound address data generation part 23 Direct sound wave Storage unit 24 Direct sound waveform readout unit 25 Direct sound envelope generation unit 26 Multiplication unit 27 Direct sound volume control unit 28 Multiplication unit 31 Hammer resonance sound waveform selection unit 32 Hammer resonance sound address data generation unit 33 Hammer resonance sound waveform storage unit 34 Hammer Resonance sound waveform readout unit 35 Hammer resonance sound envelope generation unit 36 Multiplication unit 37 Hammer resonance sound volume control unit 38 Multiplication unit 41 String resonance sound waveform selection unit 42 String resonance sound address data generation unit 43 String resonance sound waveform storage unit 44 String resonance Sound waveform readout unit 45 String resonance sound envelope String generating section 46 multiplying unit 47 resonant sound volume control unit 48 multiplying unit 52 damper noise address data generator 53 Danpanoizu waveform storage unit 54 Danpanoizu waveform reading section 55 damper noise envelope generator 56 multiplies portion 57 Danpanoizu volume controller 58 multiplying unit

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshito Ohara 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D378 AD02 AD51 BB14 BB15 BB16 CC36 CC37 WW14

Claims (4)

[Claims] 1. A control signal generator for generating a control signal indicating a pitch of a depressed key, timing of depressing and releasing a key, and a state of a damper pedal, and at least a sound of the depressed key among the control signals. A direct sound generator for generating a direct sound signal in accordance with a control signal indicating a height and a key press / release timing; and a plurality of control signals for generating a resonance sound signal in accordance with at least a control signal indicating a state of a damper pedal. An electronic musical instrument provided with a resonance sound generating section, wherein the plurality of resonance sound generating sections include a string resonance sound generation section that generates a string resonance sound signal, and a hammer resonance sound generation section that generates a hammer resonance sound. And a damper noise generator that generates a damper noise signal, wherein the string resonance sound generator is configured to generate a string resonance sound signal corresponding to a pitch of a depressed key; The generator is a damper pedal The damper noise generating section is configured to generate a hammer resonance sound signal corresponding to the depression depth of the key, and the damper noise generation section is configured to generate a damper noise signal corresponding to the depression of the damper pedal at the timing of turning on the damper pedal. In addition to the direct sound corresponding to the key pressed in response to the depression of the key and the depression of the damper pedal, the resonance sound including the string resonance sound and the hammer resonance sound is output together with the direct sound corresponding to the key pressed, and the resonance sound including the damper noise corresponding to the depression of the damper pedal is generated. An electronic musical instrument characterized by being configured to output. 2. The control signal generator according to claim 1, wherein the control signal generator controls a volume output from the damper noise generator in accordance with a stepping speed of a damper pedal, and controls an output volume of a resonance sound composed of the damper noise. The electronic musical instrument according to claim 1, wherein: 3. The damper noise generator according to claim 1, wherein the damper noise generator is configured to generate a plurality of damper noise signals, and is configured to select the plurality of damper noise signals according to a stepping speed of a damper pedal. Electronic musical instrument. 4. The electronic musical instrument according to claim 1, wherein the damper noise generator is configured to output when the damper pedal is on and to attenuate rapidly when the damper pedal is off.