JP7500937B2 - Electronic wind instrument, musical tone generation method and program - Google Patents

Description

The present invention relates to an electronic wind instrument, a method for generating musical tones, and a program.

Electronic wind instruments that mimic the shape and playing style of acoustic wind instruments (e.g., saxophones) are known. One way to play acoustic wind instruments is to use a "growl technique" in which the performer not only blows into the instrument, but also actually makes a "whoosh" sound while playing, giving the sound a muddy tone. Patent Document 1 discloses a technology for an electronic musical instrument that uses electronic technology to realize a wind instrument, detecting the pressure of the breath blown in by the performer and the voice produced, and seamlessly changing the musical tone signal that is generated based on the results of both detections. This conventional technology makes it possible to produce sounds using special playing techniques such as the growl technique.

JP 2015-225271 A

In the configuration of Patent Document 1, the pressure sensor that detects the pressure of the breath blown by the performer also detects the pressure (sound pressure) of the voice that accompanies vocalization using the growl technique. This causes the signal output from the pressure sensor to fluctuate, resulting in the problem that the electronic musical instrument cannot produce a stable sound.

The present invention was made in consideration of these problems, and aims to provide an electronic wind instrument, a tone generation method, and a program that can produce stable sounds even when playing with the growl technique.

In order to achieve the above object, the present invention provides an electronic wind instrument,
a breath pressure detection unit that detects a composite pressure corresponding to the pressure of the breath blown into the mouthpiece and the pressure component of the voice uttered together with the breath , and generates a first signal based on the composite pressure;
a voice detection unit that detects the voice being spoken and generates a second signal indicating the strength of the voice;
a voice component removal unit that generates a third signal by removing a pressure component of the voice from the first signal based on the second signal;
a musical tone generating means for generating musical tones based on the second signal and the third signal;
The present invention is characterized by comprising:

The present invention allows you to produce a stable sound even when using the growl technique.

1A and 1B are a front view and a side view of an electronic wind instrument according to an embodiment of the present invention. 1 is a schematic diagram showing a cross section of a mouthpiece of an electronic wind instrument according to an embodiment. FIG. 1 is a block diagram showing the electronic configuration of an electronic wind instrument according to an embodiment. 1 is a block diagram showing the functional configuration of an electronic wind instrument according to an embodiment. 5A to 5C are diagrams showing an example of a normal sound table and a growl sound table referred to by a synthesis ratio determination unit in the embodiment. 5 is a diagram illustrating an example of a gain table to which a gain determination unit according to the embodiment refers; FIG. 5 is a flowchart showing a main process of the electronic wind instrument according to the embodiment. 5 is a flowchart showing a voice component removal process for the electronic wind instrument according to the embodiment. In the voice component removal process of an electronic wind instrument in accordance with an embodiment, (a) an example of a breath signal output by a breath pressure detection unit, (b) an example of an audio signal output by a voice detection unit, (c) an example of a voice envelope output by an envelope extraction unit, (d) an example of an inverted signal output by an inverted signal generation unit, and (e) an example of a breath signal from which the audio signal components have been removed and output by an addition unit. 4 is a flowchart showing a musical tone generation process of the electronic wind instrument according to the embodiment. FIG. 13 is a block diagram showing the physical configuration of an electronic wind instrument according to a modified example. FIG. 13 is a block diagram showing the physical configuration of a voice component removal block according to a modified example.

The electronic wind instrument according to the embodiment of the present invention will be described in detail below with reference to the drawings. Note that the same or corresponding parts in the drawings are given the same reference numerals.

The electronic wind instrument of this embodiment is an instrument that generates a breath signal by removing the pressure components of the voice produced by growling technique from the output signal indicating the breath pressure of the breath sensor, and generates musical tones based on the generated breath signal and the voice signal of the voice sensor.

First, referring to FIG. 1, the external appearance of an electronic wind instrument 100 according to an embodiment will be described. The electronic wind instrument 100 has an external appearance that mimics the shape of an acoustic wind instrument, a saxophone. The electronic wind instrument 100 comprises a tube section 10 having a tubular housing, an operator 20 that is provided on the side of the tube section and operated by the performer's fingers, a mouthpiece 30 that is provided at one end of the tube section 10 (left side of the drawing) and held by the performer, and a sound generating section 90 at the other end (right side of the drawing) that has a speaker that outputs musical tones.

When a player holds the mouthpiece 30 of the electronic wind instrument 100 in his/her mouth and blows into it, the electronic wind instrument 100 produces a normal sound. When using the growl technique, the player produces a voice in parallel with the blowing action, causing the electronic wind instrument 100 to produce a musical sound that is a mix of normal and growl sounds.

Figure 2 is a cross-sectional view of the mouthpiece 30. The mouthpiece 30 includes a mouthpiece body 31, a breath sensor 32, and a voice sensor 33.

The mouthpiece body 31 is provided with a cavity 31a and a blowing port 31b that communicates with the cavity 31a. When the player blows into the mouthpiece 30 while holding it in his mouth, the breath is guided through the blowing port 31b into the cavity 31a inside the mouthpiece body 31. When the player speaks while holding the mouthpiece 30 in his mouth, the voice is guided through the blowing port 31b into the cavity 31a inside the mouthpiece body 31.

The breath sensor 32 is composed of, for example, a pressure sensor, and detects the pressure of the performer's breath blown into the mouthpiece 31b.

The voice sensor 33 is composed of, for example, a microphone, and detects the voice produced by the performer's growling technique.

Next, the electronic configuration of the electronic wind instrument 100 will be described with reference to Figure 3. The electronic wind instrument 100 includes a breath pressure detection unit 40 that detects the pressure of the breath blown into the mouthpiece 30 by the performer, a sound detection unit 50 that detects the sound produced by the performer when playing with the growl technique, a control unit 20 that is operated by the performer's fingers, an input/output interface 21 that is connected to the control unit 20, a sound source 60 that generates musical tones, a control unit 70 that controls each unit, a sound generation unit 90 that outputs musical tones, and a bus 99.

The breath pressure detection unit 40 has the aforementioned breath sensor 32 and an ADC (Analog to Digital Converter) 41 connected to the breath sensor 32. The ADC 41 converts the pressure of the player's breath detected by the breath sensor 32 into a digital signal representing the player's breath pressure value (breath value) and transmits it to the control unit 70.

The sound detection unit 50 has the aforementioned voice sensor 33 and an ADC 51 connected to the voice sensor 33. The ADC 51 converts the performer's voice (sound pressure) detected by the voice sensor 33 into a digital signal and transmits it to the control unit 70.

The aforementioned operator 20 is operated by the performer's fingers and functions as an input unit that accepts instructions from the performer's fingers. The operator 20 includes a pitch designation key that accepts instructions to designate the pitch of a musical tone. The performer's instructions accepted by the operator 20 are output to the control unit 70 via the input/output interface 21 as a signal representing the instruction from the operator 20. The control unit 70 determines the pitch based on the received signal.

The sound source 60 includes a synthesizer (e.g., a sound source LSI (Large scale Integrated Circuit)). The sound source 60 stores normal sound waveform data and growl sound waveform data for a wind instrument. The normal sound waveform data is waveform data sampled from musical tones produced when a wind instrument is normally played. The growl sound waveform data is waveform data sampled from musical tones produced when a wind instrument is played using a growling technique. The sound source 60 reads out each waveform data in parallel at a pitch determined by the control unit 70 and outputs it to the control unit 70.

The sound generation unit 90 outputs musical tones to the outside of the electronic wind instrument 100 based on the signal representing the musical tones output from the control unit 70. The sound generation unit 90 includes a DAC 91 that converts the digital signal representing the musical tones into an analog signal, an amplifier 92 that amplifies the signal representing the musical tones, a speaker 93 that outputs the musical tones, and the like.

The control unit 70 controls the overall operation of the electronic wind instrument 100, and as shown in FIG. 3, includes a CPU (Central Processing Unit) 71 that executes various processes, a ROM (Read Only Memory) 72 that stores programs and fixed data, and a RAM (Random Access Memory) 73 that stores data. The functions of the control unit 70 are realized by the CPU 71 executing the programs stored in the ROM 72. The ROM 72 also stores a normal sound table 200 and a growl sound table 201 that are referenced when the control unit 70 (described later) calculates the synthesis ratio (proportion) of normal sounds and growl sounds, a gain table 300 that is referenced when generating a musical tone signal output from the sound generation unit 90, a voice envelope threshold value that is used when determining whether to output a voice envelope, and a breath threshold value that is used when determining whether to output a sound generation instruction to the sound source 60.

ADC51, ADC41, CPU71, ROM72, RAM73, input/output interface21, sound source60, and DAC91 are interconnected by bus99.

Next, referring to FIG. 4, we will explain the functions realized by the electronic circuit shown in FIG. 3.

The control unit 70 of the electronic wind instrument 100 functionally comprises a voice component removal block 80, a pitch determination unit 85, a synthesis ratio determination unit 86, a synthesis unit 87, a gain determination unit 88, and a musical tone generation unit 89.

The voice component removal block 80 is a circuit that removes the voice components (voice values) contained in the breath signal output from the breath pressure detection unit 40, and has an envelope extraction unit 81, a gain adjustment unit 82, an inverted signal generation unit 83, and an addition unit 84. Note that the breath signal output from the breath pressure detection unit 40 is an example of the first signal in the claims.

The envelope extraction unit 81 receives the audio signal output by the voice detection unit 50, extracts an envelope from the audio signal, and generates a voice envelope. The envelope extraction unit 81 compares the level of the extracted voice envelope (voice envelope value) with a voice envelope threshold Vvth, which is a predetermined threshold, and outputs the voice envelope when the voice envelope value is greater than or equal to the voice envelope threshold Vvth.

For example, the envelope extraction unit 81 performs a process (e.g., low-pass filter process) of picking up the peak level of the voice signal output by the voice sensor 33 and converted into a digital signal by the ADC 51, and outputs the result as a voice envelope. The envelope extraction unit 81 judges whether the voice envelope value is equal to or greater than a voice envelope threshold value Vvth, and outputs it if it is judged to be equal to or greater than the voice envelope threshold value Vvth.
The audio signal output from the audio detection unit 50 is an example of a second signal in the claims.

The envelope extraction unit 81 also extracts the envelope of the AC component from the breath signal output by the breath pressure detection unit 40, and outputs the extracted envelope of the AC component of the breath signal and the voice envelope to the gain adjustment unit 82.

The gain adjustment unit 82 determines a gain adjustment value, which is a multiplier by which the inverted signal generated by the inverted signal generation unit 83 is multiplied, based on the envelope of the AC component of the breath signal output by the envelope extraction unit 81 and the voice envelope. For example, the gain adjustment unit 82 determines the gain adjustment value so that the voice envelope value matches the level of the envelope of the AC component of the breath signal. The gain adjustment unit 82 is an example of an equivalent means in the claims.

The inverted signal generating unit 83 inverts the audio signal output by the audio detection unit 50 to generate an inverted signal, and multiplies the generated inverted signal by a gain adjustment value.

The adder 84 adds the outputs of the breath pressure detector 40 and the inverted signal generator 83. The inverted signal generator 83 and the adder 84 are an example of the elimination circuit in the claims.

The pitch determination unit 85 determines the pitch of the musical tone to be generated based on the operating state of the performer's fingers on the controls 20, and issues a sound generation instruction to the sound source 60. Specifically, the pitch determination unit 85 determines whether the level of the breath signal (breath value) is equal to or greater than a predetermined threshold, the breath threshold, and if so, outputs an instruction to the sound source 60 to generate sound at the pitch determined by the pitch determination unit 85. Upon receiving the sound generation instruction, the sound source 60 reads out normal sound data and growl sound data in parallel at the pitch based on the sound generation instruction, and outputs them to the synthesis unit 87.

The synthesis ratio determination unit 86 calculates the synthesis ratio (proportion) of the normal sound, which is a typical musical tone of a wind instrument, and the growl sound, which is a musical tone produced by the growling technique of a wind instrument, according to the level of the voice envelope extracted by the envelope extraction unit 81, and determines the multiplier for each.

Specifically, the synthesis ratio determination unit 86 determines the multipliers for the normal sound and the growl sound by referring to the normal sound table 200 and the growl sound table 201 shown in FIG. 5 for the input value of the voice envelope level. As shown in the figure, the normal sound table 200 has a characteristic that, with the voice envelope value extracted by the envelope extraction unit 81 as input, the multiplier decreases from 1 to 0 as the voice envelope value becomes larger. The growl sound table 201 has a characteristic that the multiplier increases from 0 to 1 as the voice envelope value becomes larger.

The synthesis unit 87 multiplies the normal sound data and growl sound data output from the sound source 60 by the multipliers determined by the synthesis ratio determination unit 86, and adds the products to generate a musical sound signal that synthesizes the normal sound data and the growl sound data. The synthesis unit 87 outputs the generated musical sound signal to the musical sound generation unit 89.

The gain determination unit 88 determines the gain for the musical tone signal output from the synthesis unit 87 according to the level of the breath signal output by the addition unit 84, and determines the corresponding multiplier.

Specifically, the gain determination unit 88 determines the multiplier for the breath value by referring to a gain table 300 shown in FIG. 6. As shown in the figure, the gain table 300 has the characteristic that, with the breath value output by the addition unit 84 as input, the output multiplier is 0 (zero) until the breath value reaches a predetermined breath threshold, and once the breath value exceeds the breath threshold, the output multiplier increases from 0 toward 1 as the breath value increases.

The musical sound generation unit 89 multiplies the output of the synthesis ratio determination unit 86 by the determined multiplier, generates a musical sound signal indicating the musical sound to be output by the sound generation unit 90, and outputs it to the sound generation unit 90. The sound generation unit 90 outputs the sound indicated by the musical sound signal supplied from the musical sound generation unit 89.

Next, the operation of the electronic wind instrument 100 having the above configuration will be described with reference to FIGS.
As described above, the electronic wind instrument 100 executes, as main processes, a voice component removal process for generating a signal by removing the pressure component of the voice from the breath signal output by the breath pressure detection unit 40, and a process for generating musical tones based on the signal by removing the voice component and the voice signal output by the voice detection unit 50. First, when the performer turns on the power of the electronic wind instrument 100 (not shown), the electronic wind instrument 100 goes into standby in an initial state.

When a player holds the mouthpiece 30 of the electronic wind instrument 100, which is in a standby state in the initial state, in his/her mouth and starts playing, the breath sensor 32 detects the pressure of the breath and outputs a breath signal indicating the detected pressure. Furthermore, when the player uses the growl technique and vocalizes, the voice sensor 33 detects the sound and outputs an audio signal indicating the volume of the sound. The output breath signal and audio signal are output to the control unit 70 via the ADCs 41 and 51.

The control unit 70 executes a voice component removal process to remove the voice pressure component from the breath signal based on the breath signal input from the breath pressure detection unit 40 and the voice signal input from the voice detection unit 50 (step S11). This process is executed by the envelope extraction unit 81, gain adjustment unit 82, inverted signal generation unit 83, and addition unit 84 of the voice component removal block 80 in FIG. 4. The voice component removal process (step S11) will be described in detail later.

Next, the control unit 70 performs a musical tone generation process (step S12) in which the control unit 70 receives the breath signal and voice envelope obtained by the voice component removal process, and pitch information based on the player's operating state of the operator 20, and generates a musical tone signal indicating the musical tone to be output by the sound generation unit 90. This process is executed by the functions of the pitch determination unit 85, synthesis ratio determination unit 86, synthesis unit 87, gain determination unit 88, and musical tone generation unit 89 in FIG. 4. The musical tone generation process (step S12) will be described in detail later.

If an end instruction is input to the control unit 70 (step S13; YES), the control unit 70 ends the main processing. If an end instruction is not input to the control unit 70 (step S13; NO), the processing returns to the voice component removal processing (step S11).

Next, the voice component removal process (step S11) will be described in detail with reference to FIG. 8.

First, the envelope extraction unit 81 receives the audio signal output from the voice detection unit 50 and obtains the voice value (step S101).

Next, the envelope extraction unit 81 extracts a voice envelope from the audio signal (step S102), and determines whether the level of the extracted voice envelope is equal to or greater than the voice envelope threshold Vvth (step S103). If the envelope extraction unit 81 determines that the voice envelope value is equal to or greater than the voice envelope threshold Vvth (step S103; Yes), the envelope extraction unit 81 outputs the voice envelope (step S104). Furthermore, the envelope extraction unit 81 stores the extracted voice envelope in the RAM 73.

Next, the envelope extraction unit 81 receives the breath signal output from the breath pressure detection unit 40 and acquires the breath value (step S105). The envelope extraction unit 81 extracts and outputs the envelope of the AC component from the breath signal (step S106).

Next, the gain adjustment unit 82 acquires the voice envelope extracted by the envelope extraction unit 81 and the envelope of the AC component of the breath signal, and determines a gain adjustment value (step S107). The gain adjustment unit 82 determines and outputs a gain adjustment value so that the voice envelope value matches the level of the envelope of the AC component of the breath signal.

Next, the inverted signal generating unit 83 receives the audio signal output from the audio detection unit 50, and generates an inverted signal by inverting the audio signal (step S108). Furthermore, the inverted signal generating unit 83 obtains the gain adjustment value determined by the gain adjustment unit 82, and multiplies the inverted signal generated in step S108 by the gain adjustment value (step S109).

Next, the adder 84 acquires the breath signal output from the breath pressure detection unit 40, adds the signal acquired in step S109 to the acquired breath signal, and outputs the acquired breath signal (step S110). This process corresponds to removing the voice component by subtracting the voice component detected by the voice detection unit 50 from the voice component contained in the breath signal output from the breath pressure detection unit 40. The adder 84 stores the output breath signal in the RAM 73 (step S111).
Then, the process returns to the main process and proceeds to the musical tone generation process (step S12).

On the other hand, if it is determined in step S103 that the voice envelope value is less than the voice envelope threshold value Vvth (step S103; No), the process returns to the main process and proceeds to the musical sound generation process (step S12).

Next, the above-mentioned voice component removal process (step S11) will be described in more detail with reference to a specific example in FIG.
Figure 9 shows a timing chart of each signal when the electronic wind instrument 100 is on, the performer starts normal performance by blowing into the instrument, then performs growling for a certain period of time, and then ends the performance by blowing into the instrument only again, and the voice component is removed from the breath signal.

Fig. 9(a) is an example of a breath signal output by the breath pressure detection unit 40, and Fig. 9(b) is an example of an audio signal output by the audio detection unit 50. As shown in Fig. 9(a), when the performer starts blowing, a breath signal indicating the breath pressure inside the mouthpiece 30 detected by the breath sensor 32 is output. In the growl performance section where vocalization is performed in parallel with the blowing action, the breath signal takes on a waveform in which an audio signal is superimposed due to the influence of the pressure of the voice produced by vocalization.
On the other hand, as shown in FIG. 9(b), in the section where the performer is not performing a growl performance, the audio signal is almost at 0 level, and in the growl performance section, an audio signal is output that is different in amplitude from the audio signal superimposed on the breath signal but is almost in phase with it.

In step S101, the envelope extraction unit 81 receives the audio signal shown in FIG. 9(b) output by the audio detection unit 50, acquires the voice value, and judges whether the voice envelope value is equal to or greater than the voice envelope threshold Vvth (step S103). In the example of FIG. 9(b), during the period from the start of the performance to the start of the growl performance and after the growl performance ends, it judges that the voice envelope value is less than the voice envelope threshold Vvth (step S103; No), and does not output the voice envelope as shown in FIG. 9(c). That is, it sets the voice envelope level to 0 level. On the other hand, in the growl section, the envelope extraction unit 81 judges that the voice envelope value is equal to or greater than the voice envelope threshold Vvth (step S103; Yes), and outputs the voice envelope from the audio signal as shown in FIG. 9(c) (step S104).

Next, the gain adjustment unit 82 obtains the voice envelope extracted by the envelope extraction unit 81 in step S104 and the envelope of the AC component of the breath signal extracted in step S106, determines a gain adjustment value, and outputs it (step S107).

In step S108, the inverted signal generating unit 83 inverts the positive and negative of the audio signal shown in FIG. 9(b) output from the voice detection unit 50 to generate an inverted signal as shown in FIG. 9(d). Furthermore, in step S109, the inverted signal generating unit 83 acquires the gain adjustment value determined by the gain adjustment unit 82, and multiplies the inverted signal generated in step S108 by the gain adjustment value. The output value of the signal obtained in step S109 is equal to the magnitude of the voice component in the breath signal shown in FIG. 9(a).

Next, the adder 84 adds the signal obtained in step S109 to the breath signal output from the breath pressure detection unit 40. As shown in FIG. 9(d), in the normal performance section, the voice level is nearly 0, and the sum is the same as the breath signal level, as shown in FIG. 9(e). On the other hand, in the growl section, as shown in FIGS. 9(a) and (d), the audio signal levels are nearly equal and the polarities are opposite. Therefore, when these are added, the audio signal components cancel each other out, and a breath signal from which the audio signal components have been removed is obtained, as shown in FIG. 9(e).

Next, the tone generation process of the electronic wind instrument 100 that produces musical tones will be described with reference to FIG. 10. The control unit 70 reads the breath signal and voice envelope output by the voice component removal process described above, and starts the tone generation process.

First, the pitch determination unit 85 determines whether the level of the acquired breath signal is equal to or greater than a predetermined breath threshold (step S201). If the pitch determination unit 85 determines that the breath value is equal to or greater than the breath threshold (step S201; Yes), it reads the signal representing the instruction by the operator 20 output from the operator 20 and determines the pitch of the musical tone from the signal representing the instruction by the operator 20 (step S202). If the pitch determination unit 85 determines that the breath value is less than the breath threshold (step S201; No), it instructs the sound source 60 to stop sound generation (step S208).

The pitch determination unit 85 transmits information about the determined pitch to the sound source 60. Based on the pitch information transmitted from the pitch determination unit 85, the sound source 60 reads out the normal sound waveform data and growl sound waveform data of the determined pitch, and outputs them to the synthesis unit 87 (step S203).

Next, the synthesis ratio determination unit 86 obtains the voice envelope, and by referring to the normal sound table 200 and the growl sound table 201, determines multipliers for the normal sound and the growl sound according to the voice envelope value, and outputs them to the synthesis unit 87 (step S204). The synthesis unit 87 obtains normal sound waveform data and growl sound waveform data from the sound source 60, multiplies each by the multiplier determined by the synthesis ratio determination unit 86, and adds the outputs to generate a musical sound signal (step S205). The synthesis unit 87 outputs the generated musical sound signal to the musical sound generation unit 89.

Next, the gain determination unit 88 acquires the breath signal output by the addition unit 84, refers to the gain table 300, and determines a multiplier, which is the final gain for the musical tone signal, according to the breath value (step S206). The gain determination unit 88 outputs the determined multiplier to the musical tone generation unit 89.

The musical tone generating unit 89 multiplies the musical tone signal generated by the synthesis unit 87 by the multiplier determined by the gain determining unit 88 to generate a final musical tone signal (step S207). The musical tone generating unit 89 outputs the generated final musical tone signal to the sound generating unit 90. The sound generating unit 90 outputs musical tones to the outside of the electronic wind instrument 100 based on the final musical tone signal received from the musical tone generating unit 89.
As described above, the electronic wind instrument 100 is equipped with a voice component removal block 80 that generates a signal by removing the voice pressure components from the breath signal output by the breath pressure detection unit 40, and by generating musical tones based on the signal from which the voice components have been removed and the audio signal output by the audio detection unit 50, it is possible to produce a stable sound even when playing with the growl technique.

(Modification)
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the present invention.

In the embodiment, the control unit 70 is described as executing the processing of the voice component removal block 80, but the processing of the voice component removal block 80 can also be executed by hardware.

Figure 11 shows the physical configuration of the electronic wind instrument 100 when the function of the voice component removal block 80 is implemented in hardware. As shown in Figure 11, the voice component removal block 80a is configured between the voice sensor 33, the breath sensor 32 and the ADC 51, ADC 41.

Figure 12 shows the physical configuration of the voice component removal block 80a. The voice component removal block 80a includes a first gain circuit 400, a second gain circuit 401, a subtraction circuit 402, and an envelope detection circuit 403.

The first gain circuit 400 is connected to the breath sensor 32 and amplifies the analog breath signal output by the breath sensor 32. The second gain circuit 401 is connected to the voice sensor 33 and amplifies the analog audio signal output by the voice sensor 33. The gains of the output values V1 and V2 of the breath sensor 32 and voice sensor 33 are determined by the device specifications, so G1 and G2 are adjusted in advance so that when the respective multipliers G1 and G2 are multiplied by the gain circuit, the values of G1V1 and G2V2 match.

The subtraction circuit 402 subtracts the breath signal amplified by the first gain circuit 400 from the voice signal amplified by the second gain circuit 401. The breath signal output from the subtraction circuit 402 is a signal in which the voice component has been removed from the breath signal amplified by the first gain circuit 400.

The envelope detection circuit 403 is connected to the second gain circuit 401 and extracts a voice envelope from the audio signal output from the second gain circuit 401. The voice envelope extracted by the envelope detection circuit 403 is output to an ADC (not shown) and converted into a digital signal, which is then output to the control unit 70. The control unit 70 executes a musical tone generation process based on the received breath signal and voice envelope.

The configuration of the voice component removal block 80a described above allows the voice component removal process performed by the voice component removal block 80 of the control unit 70 to be executed.

In addition, in the embodiment, the electronic wind instrument 100 imitates the shape of a saxophone, but the electronic wind instrument 100 is not limited to an electronic instrument imitating the shape of a saxophone, and may be, for example, an electronic instrument imitating a clarinet, etc.

In addition, in the above-described embodiment, the breath sensor 32 detects the breath pressure produced by blowing, and the voice sensor 33 detects the sound, but this is not limited to the above. For example, the musical sound generating device disclosed in JP 2018-54859 may realize the functions of the breath sensor 32 and the voice sensor 33 using a single type of sensor.

The functions of the control unit 70 can be executed using a normal information portable terminal, a personal computer, or the like. For example, a computer program for executing the pronunciation process or the position detection process may be stored in a computer-readable recording medium and distributed, and the computer program may be installed in a personal computer or the like to configure an information terminal that executes the pronunciation process or the position detection process. In addition, the computer program may be stored in a storage device of a server device on a communication network such as the Internet, and an information processing device may be configured by downloading the computer program by a normal information processing terminal, or the like.

In addition, when the functions of the control unit 70 are realized by sharing between an OS (Operating System) and an application program, or by cooperation between an OS and an application program, only the application program portion may be stored in a recording medium or storage device.

Furthermore, it is also possible to superimpose a computer program on a carrier wave and distribute it over a communications network. For example, a computer program may be posted on a bulletin board (BBS: Bulletin Board System) on a communications network and distributed over the network. The computer program may then be started and executed under the control of the OS in the same way as other application programs, thereby enabling the above-mentioned processing to be performed.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the specific embodiment, and includes the inventions described in the claims and their equivalents. The inventions described in the original claims of this application are listed below.

(Appendix 1)
a breath pressure detection unit that generates a first signal based on the breath pressure and the pressure component of the voice;
a voice detection unit that detects an uttered voice and generates a second signal indicating the intensity of the voice;
a voice component removal unit that generates a third signal by removing a voice pressure component from the first signal based on the second signal;
a musical tone generating means for generating musical tones based on the second signal and the third signal;
Equipped with
Electronic wind instrument.

(Appendix 2)
The voice component removal unit includes:
an equalizing means for equalizing a signal level of a voice signal component included in the first signal by detecting a voice by the breath pressure detection unit and a signal level of a voice signal output by detecting the voice by the voice detection unit;
a removal circuit that removes a voice signal component from the first signal by calculating a difference between the first signal and the second signal after the equalization process by the equalization means;
2. An electronic wind instrument as described in claim 1, comprising:

(Appendix 3)
a sound source for outputting a musical tone signal of a normal sound which is a musical tone during normal playing and a musical tone signal of a growl sound which is a musical tone during playing by the growl technique;
a synthesis unit for synthesizing a musical tone signal of a normal sound and a musical tone signal of a growl sound at a predetermined ratio;
a synthesis ratio determination unit that determines a synthesis ratio between a musical tone signal of a normal sound and a musical tone signal of a growl sound by the synthesis unit;
3. The electronic wind instrument according to claim 1 or 2, further comprising:

(Appendix 4)
acquiring a first signal based on the breath pressure and the pressure component of the voice from the breath pressure detection unit;
acquiring a second signal indicating the intensity of the voice from a voice detection unit that detects the voice being spoken;
generating a third signal by removing a pressure component of the voice from the first signal based on the second signal;
generating a musical tone based on the second signal and the third signal.
A method for generating musical sounds.

(Appendix 5)
On the computer,
A process of acquiring a first signal based on the breath pressure and the pressure component of the voice from the breath pressure detection unit;
A process of acquiring a second signal indicating the intensity of the voice from a voice detection unit that detects the voice being spoken;
A process of generating a third signal by removing a voice pressure component from the first signal based on the second signal;
and generating a musical tone based on the second signal and the third signal.
program.

100: Electronic wind instrument, 10: Tube body, 20: Operator, 21: Input/output interface, 30: Mouthpiece, 31: Mouthpiece main body, 31a: Cavity, 31b: Air inlet, 32: Breath sensor, 33: Voice sensor, 40: Breath pressure detection section, 41: ADC, 50: Voice detection section, 51: ADC, 60: Sound source, 70: Control section, 71: CPU, 72: ROM, 73: RAM, 80, 80a: Voice component removal block, 81: Envelope extraction unit, 82...gain adjustment unit, 83...inverted signal generation unit, 84...addition unit, 85...pitch determination unit, 86...combination ratio determination unit, 87...combination unit, 88...gain determination unit, 89...musical tone generation unit, 90...sound generation unit, 91...DAC, 92...amplifier, 93...speaker, 99...bass, 200...normal sound table, 201...growl sound table, 300...gain table, 400...first gain circuit, 401...second gain circuit, 402...subtraction circuit, 403...envelope detection circuit.

Claims (5)

a breath pressure detection unit that detects a composite pressure corresponding to the pressure of the breath blown into the mouthpiece and the pressure component of the voice uttered together with the breath , and generates a first signal based on the composite pressure;
a voice detection unit that detects the voice being spoken and generates a second signal indicating the strength of the voice;
a voice component removal unit that generates a third signal by removing a pressure component of the voice from the first signal based on the second signal;
a musical tone generating means for generating a musical tone based on the second signal and the third signal;
An electronic wind instrument. The voice component removal unit includes:
an equalizing means for equalizing a signal level of a voice signal component included in the first signal outputted in response to the detection of voice by the breath pressure detection unit with a signal level of a voice signal outputted in response to the detection of voice by the voice detection unit;
a removal circuit that removes a voice signal component from the first signal by calculating a difference between the first signal and the second signal after the equalization process by the equalization means;
2. The electronic wind instrument according to claim 1 .


a sound source for outputting a musical tone signal of a normal sound which is a musical tone during normal playing and a musical tone signal of a growl sound which is a musical tone during playing by the growl technique;
a synthesis unit for synthesizing a musical tone signal of a normal sound and a musical tone signal of a growl sound at a predetermined ratio;
a synthesis ratio determination unit that determines a synthesis ratio between a musical tone signal of a normal sound and a musical tone signal of a growl sound by the synthesis unit;
3. The electronic wind instrument according to claim 1 or 2, further comprising: a step of detecting a composite pressure corresponding to the pressure of the breath blown into the mouthpiece and a pressure component of the voice uttered together with the breath from a breath pressure detection unit, and acquiring a first signal based on the composite pressure;
acquiring a second signal indicating the intensity of the voice from a voice detection unit that detects the voice being spoken ;
generating a third signal by removing a pressure component of the voice from the first signal based on the second signal;
generating a musical tone based on the second signal and the third signal.
A method for generating musical tones in an electronic wind instrument . On the computer,
a process of detecting a composite pressure corresponding to the pressure of the breath blown into the mouthpiece and the pressure component of the voice uttered together with the breath from a breath pressure detection unit, and acquiring a first signal based on the composite pressure;
A process of acquiring a second signal indicating the intensity of the voice from a voice detection unit that detects the voice being spoken;
A process of generating a third signal by removing a pressure component of the voice from the first signal based on the second signal;
and generating a musical tone based on the second signal and the third signal.
Program for electronic wind instruments .

Images