JP6648457B2 - Electronic musical instrument, sound waveform generation method, and program - Google Patents

Description

  The present invention relates to an electronic musical instrument, a sound waveform generation method, and a program.

  Conventionally, an excitation signal is circulated in a delay loop circuit including a variable delay circuit, and a harmonic model is extracted by controlling a delay amount of the variable delay circuit in accordance with pitch information, thereby forming a physical model of a resonance phenomenon of a wind instrument. A sensor that simulates and further detects the parameters of a filter circuit (musical sound effector) inserted in the delay loop circuit to determine the blowing pressure, the shape of the lips and tongue, the bite pressure, the shape of the throat, etc. 2. Description of the Related Art Electronic musical instruments have been known in which a performance close to self-excited oscillation performed by an actual wind instrument is realized by controlling the output using an output (for example, techniques described in Patent Documents 1 to 4).

JP-A-6-161461 JP-A-6-266363 JP-A-7-129181 Japanese Patent No. 3226255

  However, in the conventional technology in which only the delay loop circuit and the filter circuit are combined, there is a disadvantage that the self-excited oscillation is attenuated immediately and the sound disappears, or conversely, the oscillation diverges and the volume is shaken off, It has been difficult to realize, with an electronic musical instrument, an operation of continuously producing a wind instrument sound by embouchure in playing a natural musical instrument.

  Therefore, an object of the present invention is to realize a performance close to the playing feeling of a natural musical instrument by enabling continuous self-excited oscillation.

In one example of the aspect, in response to the pitch designation, after delaying the waveform data output corresponding to the pitch, a filtering process for filtering the delayed waveform data, A processing unit that executes an adjustment signal output process of outputting an adjustment signal for adjusting the level of the filtered waveform data based on the adjustment signal, and an adjustment process of adjusting the level of the filtered waveform data based on the adjustment signal The processing unit, in the filter processing, in response to the pitch designation, setting processing to set the waveform data corresponding to the pitch, delay processing to delay the set waveform data, And filtering processing for filtering the delayed waveform data.

  According to the present invention, continuous self-excited oscillation becomes possible, and it is possible to realize a performance close to the feeling of playing a natural musical instrument.

It is a figure showing an example of appearance of an electronic wind instrument by this embodiment. It is sectional drawing which shows the structural example of a mouthpiece sensor part. FIG. 2 is a diagram illustrating an example of a hardware configuration of a tone control device that controls an electronic wind instrument. FIG. 3 is a block diagram illustrating a functional configuration example of a sound source LSI. FIG. 4 is a block diagram illustrating a functional configuration example of a variable delay unit. FIG. 3 is a block diagram illustrating a functional configuration example of a volume detection unit. FIG. 3 is a block diagram illustrating a functional configuration example (1) of a filter unit. FIG. 9 is a block diagram illustrating a functional configuration example (2) of the filter unit. 6 is a flowchart illustrating a control processing example of a CPU of the musical sound control device.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the present embodiment, in a feedback loop circuit formed by a variable delay unit and a filter unit, a volume value is detected from a waveform stored in the variable delay unit, and the feedback amount is inversely controlled based on the detected volume value. It is an electronic musical instrument that can obtain continuous self-sustained pulsation corresponding to performance.

  FIG. 1 is a diagram showing an example of the appearance of an electronic wind instrument 100 according to the present embodiment. The electronic wind instrument 100 has a shape portion 101 imitating a traditional wind instrument (hereinafter, referred to as a “natural wind instrument”) that is not an electronic musical instrument, a mouthpiece sensor portion 102 on which a plurality of sensors are mounted, and a finger hole of the natural wind instrument. It includes a corresponding performance switch section 103, an opening section 104 for emitting an acoustic signal, a speaker section 105 for converting a musical tone waveform signal into an acoustic signal, and an operation switch section 106 for specifying various operations other than the performance operation. .

  FIG. 2 is a cross-sectional view illustrating a configuration example of the mouthpiece sensor unit 102 in FIG. The blowing pressure sensor 201 (breath sensor) installed at the back inside the mouthpiece sensor unit 102 is, for example, a pressure sensor, and detects the blowing pressure of the breath blown by the player holding the blowing port 206 with his mouth. The tongue sensor 202 detects the shape of the tongue when the player holds the blowing port 206 with his / her mouth. The byte sensor 203 detects the biting pressure of the teeth when the player holds the blowing port 206 with his / her mouth. The lip (upper jaw) sensor 204 detects the position of the upper lip when the player holds the blowing port 206 with his / her mouth. The voice sensor 205 detects a sound (a glowing sound, a glowing sound, etc.) produced by the performer along with the above-mentioned blowing operation.

  FIG. 3 is a diagram showing an example of a hardware configuration of a musical tone control device 300 for controlling the electronic wind instrument 100 of FIG. 1, and is installed in the shape portion 101 of FIG. The musical tone control device 300 includes a CPU (Central Processing Unit: Central Processing Unit) 301, a ROM (Read Only Memory) 302, a RAM (Random Access Memory) 303, a sound source LSI (Large Scale Integrated Circuit) 304, and FIG. The blowing pressure sensor 201, the tongue sensor 202, the byte sensor 203, the lip sensor 204, and the voice sensor 205 in the mouthpiece sensor unit 102, and # 1 to # 5 ADCs (analog-to-digital converters) 305 to which respective outputs are connected, The ADC 1105 to which the voice sensor 102 and its output are connected as in FIG. 1 or FIG. 6, the performance switch unit 103 and the operation switch unit 106 to which the output is connected as in FIG. 1, and a GPIO (General Purpose Input Output). 306, DAC / amplifier 3 7, a similar speaker unit 105 and FIG. 1, with these are interconnected by a system bus 308 configuration. The configuration shown in the figure is an example of a hardware configuration capable of realizing the tone control device 300, and such a hardware configuration is not limited to this configuration.

  The CPU 301 controls the entire tone control device 300. The ROM 302 stores a sound generation control program. The RAM 303 temporarily stores data when the sound control program is executed.

  Each analog output new word fish of the blowing pressure sensor 201, the tongue sensor 202, the byte sensor 203, the lip sensor 204, and the voice sensor 205 in the mouthpiece sensor unit 102 shown in FIG. 2 is digitalized by the ADC 305 of # 1 to # 5, respectively. The signals are converted into sensor output data, which are signals, and sent to the sound source LSI 304 via the CPU 301.

  Each performance state and operation state of the performance switch section 103 and the operation switch section 106 (see FIG. 1) are read by the CPU 301 via the GPIO 306 and then sent to the sound source LSI 304.

  The sound source LSI 304 is, for example, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field Programmable Array), and has a function of a tone control device 300 described later with reference to block diagrams of FIGS. Realize.

  The tone waveform data output from the tone generator LSI 304 is converted from digital tone waveform data into analog tone waveform signals by the DAC / amplifier 307 via the system bus 308 from the CPU 301 and amplified by the CPU 301, and then transmitted to the speaker unit 105. Sound is emitted through.

  The function of the sound source LSI 304 may be realized by a software function of the CPU 301.

  FIG. 4 is a block diagram illustrating a functional configuration example of the sound source LSI 304 in FIG. First, the variable delay unit 401 delays the tone waveform corresponding to the pitch value specified by the performance switch unit 103 in FIG. 1 or 3 and notified from the GPIO 306 in FIG.

  The note-on initialization unit 402 sets the initial tone waveform data corresponding to the pitch value in the variable delay unit 401 based on the pitch value specified by the performance switch unit 103 and notified from the GPIO 306 via the CPU 301.

  The filter unit 403 performs a filtering process on the delay output value 408 of the variable delay unit 401 based on each sensor output data in the mouthpiece sensor unit 102.

  The volume detector 404 detects a volume value 412 (adjustment signal) from the peak value of the delay output value 408.

  The feedback unit including the multiplication unit 405 and the feedback line 406 normalizes the filter output value 409 of the filter unit 403 based on the volume value 404, and feeds back the obtained normalized filter output value 410 to the variable delay unit 401.

  An output unit including the output line 407 outputs the normalized filter output value 410 as musical tone waveform data 411.

  The tone color envelope control unit 413 controls the tone color envelope characteristics of the tone waveform data 411 by, for example, band-pass filtering based on any sensor output data of the mouthpiece sensor unit 102, for example.

  The volume envelope control unit 414 controls the volume envelope characteristic of the tone waveform data 411 by, for example, a multiplication process based on the sensor output data of the blowing pressure sensor 201 of the mouthpiece sensor unit 102, and outputs a tone output 415.

  FIG. 5 is a block diagram illustrating a functional configuration example of the variable delay unit 401 in FIG. The variable delay unit 401 is composed of n delay units D1, D2, D3,..., Dn connected in cascade, and the number n is the number of wavelength samples of the lowest pitch value of the electronic wind instrument 100 (FIG. 1). Corresponding. In each delay unit Di (1 ≦ i ≦ n), unit delay section 501 delays the input sample value by one sampling time. The initial value input unit 502 in the delay unit Di is specified by the note-on initialization unit 402 so that the delay unit Di corresponds to the pitch specified by the performance switch unit 103 from the head of the cascade connection of each delay unit. When included in the number of delay units corresponding to the number of samples of the obtained initial musical tone waveform data, a corresponding sample value of the initial musical tone waveform data is selectively output via the selection unit 504 in the delay unit Di. When the delay unit Di is included in the number of delay units other than the number of delay units corresponding to the initial musical tone waveform data, the bypass unit 503 bypasses the unit delay unit 501 in the delay unit Di and supplies the delay unit Di to the delay unit Di. The input sample value is selectively output via the selection unit 504 in the delay unit Di. As described above, the selection unit 504 in the delay unit Di determines the value of the initial tone waveform data from the initial value input unit 502 in the delay unit Di, the delay value from the unit delay unit 501 in the delay unit Di, and the delay value. One of the input values to the unit Di as it is is selectively output from the delay unit Di.

  When a new note-on is generated by the performance switch unit 103 (when the previous finger hole is different from the current finger hole), the note-on initialization unit 402 in FIG. An initial sample value group of the initial musical tone waveform data for one wavelength is calculated according to the designated pitch (tone pitch), and is input to the initial value input units 502 in the number of delay units corresponding to the number of samples for one wavelength from the beginning. The initial sample value is written, and the initial sample value is selected by the selection unit 504 to be valid. The selection unit 504 in the delay unit other than the above selects the input of the bypass unit 503 and invalidates the operation of the delay unit. The relationship between the finger hole pressing position in the performance switch unit 103 and the designated pitch, that is, the sounding pitch frequency, is tabulated as the playing method of each wind instrument. For example, when A4 = 440 Hz (Hertz), the delay value is 48000 ÷ 440 = 109.09... When the sampling frequency is 48 KHz (kilohertz). The delay unit corresponding to this number in variable delay section 401 is selected. At this time, the integer value is set as the number of delay units, and the decimal part is set as a delay interpolation value. The note-on initialization unit 402 sets, for example, a sawtooth wave for one wavelength as the initial musical sound waveform data. Alternatively, the note-on initialization unit 402 may give other waveforms such as those in a music synthesizer, such as a rectangular wave, a triangular wave, and noise. Alternatively, the note-on initialization unit 402 may set a PCM (pulse code modulation) waveform that records a natural instrument.

  When the processing at the sampling interruption timing is completed and the next sampling interruption timing is reached, the initial value output from the selection unit 504 is input to the unit delay unit 501 in the delay unit connected next and the unit delay is output. The unit 501 is initialized. After that, the selection unit 504 in the delay unit is changed to select the output of the unit delay unit 501. The selection unit 504 in the invalidated delay unit selects and inputs the input of the bypass unit 503 as it is.

  As described above, in the present embodiment, when a new note-on is generated by the performance switch unit 103, the note-on initialization unit 402 calculates at the sampling interruption timing in accordance with the pitch specified by the performance switch unit 103. The initial sample value group of the initial musical tone waveform data for one wavelength can be input to the delay units of the number corresponding to the number of samples for one wavelength from the beginning in the variable delay unit 401.

  FIG. 6 is a block diagram illustrating an example of a functional configuration of the volume detection unit 404 in FIG. The sound volume detection unit 404 includes an absolute value output unit 601, a smoothing unit 602, and an envelope detection unit 603, and performs processing equivalent to an AM (amplitude modulation) demodulation method. The absolute value output unit 601 calculates the sum of the absolute values of the output values of the plurality of delay units shown in FIG. The smoothing unit 602 smoothes the sum output from the absolute value output unit 601 in the time direction by, for example, moving average calculation or low-pass filter calculation. The envelope detection unit 603 calculates the envelope information of the output value of the smoothing unit 602, and outputs it as the volume value 412 in FIG.

  As described above, the reciprocal of the volume value 412 output from the volume detection unit 404 is calculated. The multiplier 405 in FIG. 4 multiplies the reciprocal value by the filter output value 409 and outputs the result of the multiplication as a normalized filter output value 410. In this manner, the negative feedback control is performed such that the signal level of the normalized filter output value 410 input to the variable delay unit 401 in FIG. 4 is constant. As a result, it is possible to generate a continuous sound of a wind instrument including rich sound information. Since a delay time is required until the sound volume of the normalization filter output value 410 is normalized, this constant value is set to about one-fourth of the maximum peak value of the digital waveform to provide a margin.

  FIG. 7 is a block diagram illustrating a first functional configuration example of the filter unit 403 in FIG. In the first functional configuration example, the filter unit 403 first receives the delay output value 408 of the variable delay unit 401 in FIG. 4 and converts the frequency components of the delay output value 408 into m band components # 1 to #m. And m bandpass filters (BPFs) 701 from # 1 to #m for frequency division. Note that # 1, that is, the BPF 701 in the lowest frequency band may be a low-pass filter (LPF). In addition, #m, that is, the BPF 701 in the highest frequency band may be a yes pass filter (HPF).

  Next, the filter unit 403 includes # 1 to #m multiplication units 702 that multiply outputs of the respective BPFs 701 of # 1 to #m by predetermined multiplication coefficients. Each multiplication coefficient is determined by appropriately selecting the output of the byte sensor 203, the tongue sensor 202, the voice sensor 205, or the lip sensor 204 in the mouthpiece sensor unit 102 of FIG. 1 or FIG. Is done.

  Next, the filter unit 403 adds an output of each of the multiplication units 702 from # 1 to #m, and multiplies the addition output by a predetermined multiplication coefficient to output a filter output value 409 in FIG. Including a multiplication unit 704. The multiplication coefficient is determined based on, for example, sensor output data of the blowing pressure sensor 201 in the mouthpiece sensor unit 102 of FIG. 1 or FIG. Other sensor output data may be used as appropriate.

  With the configuration of the filter unit 403 described above, it is possible to give the delay output value 408 output from the variable delay unit 401 a rich timbre change according to the playing performance of the player at the mouthpiece sensor unit 102. Becomes In this case, as described above, since a continuous sound can be output as the delay output value 408, it is possible to output a rich wind instrument sound that could not be realized by the related art.

  FIG. 8 is a block diagram showing a second functional configuration example of the filter unit 403 in FIG. In the second functional configuration example, the filter unit 403 is realized as a 2-tap chorus effect device. At this time, the frequency and the gain of the LFO (low frequency oscillator) that modulates the delay time can be controlled based on each sensor output data of the mouthpiece sensor unit 102.

  8, the filter unit 403 first receives the delay output value 408 from the variable delay unit 401 in FIG. 4 and delays the delay output values 408 by the delay amounts set in each of the delay units # 1 and # 2. 801.

  Next, the filter unit 403 includes # 1 and # 2 low-frequency oscillation units (# 1 and # 2 low-frequency oscillation units (# 1 and # 2) for generating low-frequency transmission signals of respective frequencies corresponding to the delay amounts set in the # 1 and # 2 delay units 801. LFO) 802. At this time, for example, the oscillation frequency of the # 1 LFO 802 is determined based on the sensor output data of the voice sensor 205 in the mouthpiece sensor unit 102. For example, the oscillation frequency of the # 2 LFO 802 is determined by the byte sensor in the mouthpiece sensor unit 102. The determination is made based on the sensor output data of 203. Other sensor output data may be used as appropriate.

  Further, the filter unit 403 controls the gain of the low-frequency oscillation output of each low-frequency oscillation unit of each LFO 802 of # 1 and # 2, and outputs the low-frequency oscillation signals whose gains are controlled to # 1 and # 2. # 1 and # 2 multiplication units 803 (delay amount control units) that are input as delay amounts of the respective delay units 801. At this time, for example, the gain of the multiplication unit 803 of # 1 is determined based on the sensor output data of the lip sensor 204 in the mouthpiece sensor unit 102. For example, the gain of the multiplication unit 803 of # 2 is determined in the mouthpiece sensor unit 102. It is determined based on the sensor output data of the tongue sensor 202. Other sensor output data may be used as appropriate.

  Next, the filter unit 403 adds an output of each of the delay units 801 of # 1 and # 2, and multiplies the added output by a predetermined multiplication coefficient and outputs the result as a filter output value 409 of FIG. 805. The multiplication coefficient is determined based on, for example, sensor output data of the blowing pressure sensor 201 in the mouthpiece sensor unit 102 of FIG. 1 or FIG. Other sensor output data may be used as appropriate.

  With the configuration of the filter unit 403 described above, it is possible to impart a rich chorus effect to the delay output value 408 output from the variable delay unit 401 according to the playing performance of the player at the mouthpiece sensor unit 102. Becomes In this case, as described above, since a continuous sound can be output as the delay output value 408, it is possible to output a rich wind instrument sound that could not be realized by the related art.

  FIG. 9 is a flowchart showing an example of a sampling interruption process executed by the CPU 301 of the musical tone control device 300 in FIG. 3 when the state of the performance switch unit 103 changes at each sampling interruption timing.

  First, the CPU 301 of FIG. 3 calculates a delay value and a time of one wavelength based on the state of the fingerhole switch of the performance switch unit 103 of FIG. 1, and sets them in the note-on initialization unit 402 in the sound source LSI 304 of FIG. (Step S901). As a result, the note-on initialization unit 402 sets the sample value of the initial tone waveform data in the variable delay unit 401 by the control processing described above.

  Next, the CPU 301 sets each part in the filter part 403 in the sound source LSI 304 in FIG. 3 based on each sensor output data of the mouthpiece sensor part 102 as described above with reference to FIG. 7 or FIG. (Step S902). As a result, the filter unit 403 executes a filtering process with characteristics based on each sensor output data output from the mouthpiece sensor unit 102 at the current sampling interrupt timing.

  Next, the CPU 301 acquires the volume value 412 from the volume detection unit 404 having the configuration of FIGS. 4 and 6 in the sound source LSI 304 of FIG. 3 (step S903).

  Next, the CPU 301 calculates a reciprocal value of the volume value 412 obtained in step S903, calculates a multiplication coefficient based on the reciprocal value, and uses the multiplication coefficient in the multiplication unit 405 of FIG. 4 in the sound source LSI 304 of FIG. (Step S904). As a result, control is performed such that the signal level of the filter output value 409 becomes constant and the continuous sound continues by the operation of the multiplication unit 405 described above.

  After the processing in step S904, the CPU 301 ends the sampling interruption processing at the current sampling interruption timing.

  In the embodiment described above, the case where the tone generator LSI 304 of FIG. 3 realized by a DSP, an ASIC, an FPGA, or the like realizes the function of the tone control device 300 corresponding to the block diagrams of FIGS. On the other hand, it is also possible for only the CPU 301 to realize the functions of the tone control device 300 corresponding to the block diagrams of FIGS. 4 to 8 by software processing without having the tone generator LSI 304.

  In the above-described embodiment, in the negative feedback control with the configuration in FIG. 4, depending on the value of the sensor output data from the mouthpiece sensor unit 102, the volume value is reduced by the multiplier 704 in FIG. 7 or the multiplier 805 in FIG. As a result, it is conceivable that the multiplication coefficient in the multiplication unit 405 in FIG. 4 becomes extremely large. Therefore, in the present embodiment, when the multiplication coefficient value corresponding to the reciprocal of the volume value 412 calculated in step S904 of FIG. , The output of the musical tone waveform data 411 is stopped and the note-off is performed.

  The filter unit 403 in FIG. 4 described above may have a filter configuration such as a phasor effect device or a resonance filter, such as a musical instrument effector, in addition to a bandpass filter and a chorus effect device. Further, a filter configuration realizing the tube characteristics of a natural wind instrument may be provided.

  According to the embodiment described above, a plurality of sensor output data from the mouthpiece sensor unit 102 are given to the tone control of the feedback sound source, and at that time, the volume control is performed so that the signal level of the filter output value 409 becomes constant. This makes it possible to realize a wind performance close to a natural wind instrument by continuous self-excited oscillation.

  It is also possible to realize an electronic musical instrument using sensor output data other than a wind instrument.

  Further, the sensor means for outputting the sensor output data is not limited to the mouthpiece sensor unit 102 as shown in FIG. 2, and the sensor means may obtain the sensor output data from a camera for photographing the lips of a wind player, for example. Is also good.

Regarding the above embodiments, the following supplementary notes are further disclosed.
(Appendix 1)
In response to the pitch designation, after delaying the waveform data output corresponding to the pitch, a filtering process for filtering the delayed waveform data,
An adjustment signal output process for outputting an adjustment signal for adjusting the level of the filtered waveform data based on the delayed waveform data level;
Adjustment processing for adjusting the level of the filtered waveform data based on the adjustment signal;
An electronic musical instrument, comprising: a processing unit that executes
(Appendix 2)
The processing unit includes:
In response to the pitch designation, setting processing for setting waveform data corresponding to the pitch, delay processing for delaying the set waveform data, and filtering processing for filtering the delayed waveform data, The electronic musical instrument according to supplementary note 1, wherein the electronic musical instrument performs:
(Appendix 3)
The electronic musical instrument further has a sensor unit for detecting a performance operation,
3. The electronic musical instrument according to claim 1, wherein the processing unit executes a process of filtering the delayed waveform data based on output data from the sensor unit in the filtering process.
(Appendix 4)
4. The electronic musical instrument according to claim 3, wherein the sensor unit is a mouthpiece sensor that detects any one or more performance operations of a blowing pressure, a lip operation, a tongue operation, a bite operation, and a voice operation.
(Appendix 5)
5. The processing unit according to claim 2, wherein, in the adjustment processing, the delay processing is performed on the level-adjusted waveform data in place of the waveform data set by the setting processing. Electronic musical instrument.
(Appendix 6)
In the adjustment signal output process, the processing unit includes:
Performing a process of smoothing the waveform data delayed by the delay process and outputting an adjustment signal for adjusting the level of the filtered waveform data based on the level of the smoothed waveform data; 6. The electronic musical instrument according to any one of supplementary notes 2 to 5.
(Appendix 7)
The electronic musical instrument further includes a plurality of band-pass filter units each of which receives a delayed output value and passes and outputs only a frequency component of each frequency band set to each of the frequency components of the delayed output value. ,
The processing unit, in the filtering process, based on sensor output data from the sensor unit, a filter gain control process to control the gain of each of the band-pass filter unit, and each output of the plurality of band-pass filter unit 7. The electronic musical instrument according to any one of supplementary notes 3 to 6, wherein the electronic musical instrument performs a filter output process of adding and outputting.
(Appendix 8)
The electronic musical instrument further includes a plurality of delay units each receiving the delay output value, delaying the delay output value by a set delay amount, and one or more sensor output data from the sensor. A plurality of low-frequency oscillation units for generating a low-frequency oscillation signal of each oscillation frequency corresponding to each delay amount set to each of the plurality of delay units,
The processing unit controls a gain of a low-frequency oscillation signal of each of the low-frequency oscillation units based on one or more sensor output data from the sensor unit in the filtering, and the respective gains are controlled. 7. The method according to claim 3, wherein a delay amount control process of inputting each low-frequency oscillation signal as the delay amount and a filter output process of adding and outputting respective outputs of the plurality of delay units are performed. Electronic musical instrument.
(Appendix 9)
The processing unit executes, in the adjustment signal output process, a process of outputting a reciprocal of a level of the smoothed waveform data as an adjustment signal for adjusting a level of the filtered waveform data. 7. The electronic musical instrument according to 6.
(Appendix 10)
A sound waveform generating method used for an electronic musical instrument including a processing unit, wherein the processing unit includes:
In response to the pitch designation, after delaying the waveform data output corresponding to the pitch, filtering the delayed waveform data,
Outputting an adjustment signal for adjusting the level of the filtered waveform data based on the delayed level of the waveform data;
A sound waveform generating method for adjusting a level of the filtered waveform data based on the adjustment signal.
(Appendix 11)
The computer that controls the electronic musical instrument
Delay the tone waveform corresponding to the specified pitch value,
Based on the specified pitch value, set the initial tone waveform data corresponding to the pitch value in the process of delaying the tone waveform,
Performing a filtering process on a delay output value of a process of delaying the musical sound waveform based on one or more sensor output data from a sensor unit that detects a performance operation;
Detecting a volume value from the peak value of the delay output value,
Normalizing a filter output value of the filtering process based on the volume value, and feeding back the obtained normalized filter output value to a process of delaying the musical sound waveform,
Outputting the normalized filter output value as musical sound waveform data,
Program to execute processing.

REFERENCE SIGNS LIST 100 electronic wind instrument 102 mouthpiece sensor section 105 speaker section 201 blowing pressure sensor 202 tan sensor 203 byte sensor 204 lip sensor 205 voice sensor 300 musical sound control device 401 variable delay section 402 note-on initialization section 403 filter section 404 volume detection section

Claims (11)

In response to a pitch designation, a setting process of setting waveform data corresponding to the pitch , a delay process of delaying the set waveform data, and a filtering process of filtering the delayed waveform data. The filtering to perform ,
An adjustment signal output process of outputting an adjustment signal for adjusting the level of the filtered waveform data based on the delayed level of the waveform data;
Adjustment processing for adjusting the level of the filtered waveform data based on the adjustment signal;
An electronic musical instrument, comprising: a processing unit that executes The electronic musical instrument further has a sensor unit for detecting a performance operation,
The electronic musical instrument according to claim 1, wherein the processing unit executes a process of filtering the delayed waveform data based on output data from the sensor unit in the filtering process. The electronic musical instrument according to claim 2, wherein the sensor unit is a mouthpiece sensor that detects any one or more performance operations of a blowing pressure, a lip operation, a tongue operation, a bite operation, and a voice operation. 4. The electronic device according to claim 1 , wherein, in the adjustment process, the processing unit performs the delay process on the level-adjusted waveform data instead of the waveform data set by the setting process. 5. Musical instruments. In the adjustment signal output process, the processing unit includes:
Performing a process of smoothing the waveform data delayed by the delay process and outputting an adjustment signal for adjusting the level of the filtered waveform data based on the level of the smoothed waveform data; The electronic musical instrument according to claim 2, wherein The electronic musical instrument further includes a plurality of band-pass filter units each of which receives a delayed output value and passes and outputs only a frequency component of each frequency band set to each of the frequency components of the delayed output value. ,
The processing unit, in the filtering process, based on sensor output data from the sensor unit, a filter gain control process to control the gain of each of the band-pass filter unit, and each output of the plurality of band-pass filter unit The electronic musical instrument according to claim 2, wherein the electronic musical instrument performs a filter output process of adding and outputting. The electronic musical instrument further includes a plurality of delay units each receiving the delay output value, delaying the delay output value by a set delay amount , and one or more sensor output data from the sensor unit. A plurality of low-frequency oscillation units for generating low-frequency oscillation signals of respective oscillation frequencies corresponding to the respective delay amounts set in the plurality of delay units,
The processing unit controls a gain of a low-frequency oscillation signal of each of the low-frequency oscillation units based on one or more sensor output data from the sensor unit in the filtering, and the respective gains are controlled. each delay amount control process of the low frequency oscillation signal is input as the respective delay amount, a filter output processing for adding and outputting the outputs of said plurality of delay units, the execution claims 2, 3, 5 or 6 Electronic musical instrument according to any one of the above . Wherein the processing unit in the adjustment signal output processing, according to execute a process of inverse level of the waveform data to which the smoothed, and outputs as an adjustment signal for adjusting the level of said filtered the waveform data Item 6. An electronic musical instrument according to Item 5 . A sound waveform generating method used for an electronic musical instrument including a processing unit, wherein the processing unit includes:
In response to the pitch specification, set waveform data corresponding to the pitch, delay the set waveform data, filter the delayed waveform data,
Outputting an adjustment signal for adjusting the level of the filtered waveform data based on the delayed level of the waveform data;
A sound waveform generating method for adjusting a level of the filtered waveform data based on the adjustment signal. The computer that controls the electronic musical instrument
Delay the tone waveform corresponding to the specified pitch value,
Based on the specified pitch value, set the initial tone waveform data corresponding to the pitch value in the process of delaying the tone waveform,
Performing a filtering process on a delay output value of a process of delaying the musical sound waveform based on one or more sensor output data from a sensor unit that detects a performance operation;
Detecting a volume value from the peak value of the delay output value,
Normalizing a filter output value of the filtering process based on the volume value, and feeding back the obtained normalized filter output value to a process of delaying the musical sound waveform,
Outputting the normalized filter output value as musical tone waveform data,
Program to execute processing. A sensor unit which is a mouthpiece sensor for detecting any one or more performance operations of blowing pressure, lip operation, tongue operation, bite operation, or voice operation;
  A setting process of setting waveform data corresponding to the pitch in response to a pitch designation; a delay process of delaying the set waveform data; and outputting the delayed waveform data to the sensor unit. A filtering process that performs filtering based on
  An adjustment signal output process of outputting an adjustment signal for adjusting the level of the filtered waveform data based on the delayed level of the waveform data;
  Adjustment processing for adjusting the level of the filtered waveform data based on the adjustment signal;
  An electronic musical instrument, comprising: a processing unit that executes