JP3346008B2 - Electronic wind instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic wind instrument for synthesizing musical tones of wind instruments such as flutes and trumpets.

[0002]

2. Description of the Related Art As is well known, in recent years, various electronic wind instruments for electronically synthesizing wind instrument sounds have been put into practical use. This type of musical instrument is composed of, for example, a tubular portion provided with performance operators such as a tone key / lever, and a mouthpiece portion attached to one end of the tubular portion, and has an appearance imitating a flute, a trumpet, or the like. Eggplant Such an electronic wind instrument is provided with a sensor for detecting a breath pressure blown by a player in a mouthpiece portion, and a key-on for instructing a sounding start when a breath pressure blown into the mouthpiece becomes a predetermined value or more. Generate a signal. Then, a wind instrument sound having a pitch corresponding to the tone key operated by fingering at the time of key-on is formed.

[0003]

In the conventional electronic wind instrument described above, in addition to a tone key for designating a pitch in accordance with a fingering operation, an octave of a pitch designated by the tone key is designated. Often, it has an octave key. However, considering the sounding behavior of an actual wind instrument, for example, an air reed instrument such as a flute, the resonance mode changes according to the direction of the exhalation blown into the mouthpiece and the breath pressure thereof, and the musical tone generated by this is changed. It has been found that the overtone structure and octave of the sound changes. Therefore, from this point of view, it cannot be said that the conventional electronic wind instrument provides a performance feeling close to that of a natural instrument, and it is not possible to achieve a performance expression in which the octave changes according to the direction of expiration into the mouthpiece. There are drawbacks. Therefore, the present invention has been made in view of the above circumstances, and has as its object to provide an electronic wind instrument that can perform octave control according to the direction of expiration to be blown into a mouthpiece.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, there is provided an operator which is operated by fingering, and generates pitch information corresponding to the fingering operation. Pitch designation means, a detection means provided inside a mouthpiece fitted to one end of the tubular body, and a direction for detecting the direction of expiration blown through the mouthpiece, and a detection means Pitch control means for performing pitch conversion control of the pitch information in accordance with the expiration direction and instructing a pitch to be generated.

According to a second aspect of the present invention, the detecting means includes a plurality of pressure sensors, and determines the direction of the exhalation according to an output signal output from the pressure sensors. And Further, according to the invention described in claim 3, the detection means includes a plurality of speed sensors, and determines the direction of the expiration according to an output signal output from these speed sensors.
Further, according to the invention described in claim 4, the pitch control means includes a conversion table in which the exhalation direction and a pitch conversion control value are associated with each other.

[0006]

According to the present invention, a pitch designation means having a finger-operated operation element generates pitch information corresponding to the fingering operation, and is a mouthpiece fitted to one end of the tubular body. Detection means provided inside detects the direction of expiration blown through the mouthpiece. Then, the pitch control means performs pitch conversion control of the pitch information in accordance with the expiration direction detected by the detection means, and indicates a pitch to be generated. This makes it possible to perform pitch conversion control in accordance with the direction of exhalation blown into the mouthpiece.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. A. Configuration of First Embodiment FIG. 1 is an external view showing the configuration of an electronic wind instrument according to a first embodiment of the present invention. The electronic wind instrument shown in FIG. 1 simulates a flute, and includes a plurality of tone keys 2 and a mouthpiece 3 provided in a tubular body 1. Next, FIG.
FIG. 2 is a block diagram showing an electrical configuration of the first embodiment simulating such a flute shape, and portions common to the elements shown in FIG. 1 are denoted by the same reference numerals. In FIG. 2, a tone key 2 generates an operation signal corresponding to a fingering operation by a player, and a pitch is designated by the operation signal. In this embodiment, in addition to the tone key 2,
For example, an operator such as a tone color designation switch (not shown) for designating the tone color of the generated musical tone is provided. Reference numeral 4 denotes breath pressure sensors 4a to 4c (described later) provided inside the tube portion 1 so as to face the mouth 3a of the mouthpiece 3, and detection for generating breath pressure data based on the outputs of these sensors 4a to 4c. A direction sensor unit including a circuit. The configuration of the direction sensor unit 4 will be described later.

Reference numeral 5 denotes a CP for controlling each part of the electronic wind instrument.
U, and its operation will be described later. 6 is CPU5
And a octave conversion table (described later) stored in the ROM. 7 is CP
This is a RAM for temporarily storing various operation results and register values performed in U4. Reference numeral 8 denotes a sound source constituted by a well-known waveform memory reading method, which performs tone synthesis according to operation signals and tone parameters supplied via a bus, and outputs a tone signal formed by the synthesis.
9 is a sound system. This sound system 9
Performs necessary filtering on the tone signal supplied from the sound source 8, amplifies the filtered signal, and emits it from the speaker.

Next, the configuration of the above-described breath pressure sensors 4a to 4c will be described with reference to FIGS. The breath pressure sensors 4a to 4c generate output signals corresponding to the breath pressure of the exhaled breath blown from the mouth 3a of the mouthpiece 3,
As shown in FIG. 3, it is fixed along the inner wall of the tube body 1 facing the outlet 3a. In such a configuration, for example, as shown in FIG. 4, when exhalation A is blown from the outlet 3a, the breath pressure sensor 4a detects the maximum breath pressure,
When expiration B is inhaled, breath pressure sensor 4b detects the maximum breath pressure. Further, when the exhalation C is blown, the breath pressure sensor 4c detects the maximum breath pressure. In the first embodiment, based on the output signals of the breath pressure sensors 4a to 4c which change according to the direction of the expiration blown from the outlet 3a,
It is characterized by performing octave control with reference to an octave conversion table described later, and such operation will be described below.

B. Operation of the First Embodiment Next, the operation of the embodiment with the above configuration will be described with reference to FIGS.
This will be described with reference to FIG. Here, first, the operation of the main routine will be described with reference to FIG. 5, and then the operation of each processing routine called in the main routine will be sequentially described with reference to FIGS.

Operation of Main Routine When power is applied to the electronic wind instrument according to this embodiment,
The CPU 5 loads the control program from the ROM 6, starts the main routine shown in FIG. 5, and advances the processing to step SA1. In step SA1, various registers and flags stored in the RAM 7 are reset or initialized to set initial values.
The process proceeds to A2. When proceeding to step SA2, the CPU
5 performs a switch process for generating pitch data in accordance with a fingering operation of the tone key 2. Next, when the flow proceeds to step SA3, based on the outputs of the above-described breath pressure sensors 4a to 4c, the direction of the expiration blown from the outlet 3a and its breath pressure are detected, and a musical tone parameter corresponding to the detected breath pressure and direction is generated. Perform sensor processing. Then, the next step SA
In step 4, a tone generation process for supplying the generated tone parameters to the tone generator 8 is executed. Subsequently, in step SA5, other processing such as changing the timbre according to the operation of the timbre designation switch is performed. Thereafter, steps SA2 to SA5 described above are sequentially repeated.

Operation of Switch Processing Routine As described above, when initialization is completed after power-on, C
PU5 proceeds to step SA2, activates the switch processing routine shown in FIG. 6, and proceeds to step SB1.
In step SB1, key scan of the tone key 2 is performed,
The on / off state of the tone key 2, that is, the fingering operation is detected. Next, when the process proceeds to step SB2, the pitch data specified according to the detected fingering operation is stored in the register PT, and this routine is completed, and the process returns to the main routine.

Operation of Sensor Processing Routine When the switch processing routine is completed in this way, the CPU 5
Proceeds to step SA3, and executes a sensor processing routine shown in FIG. When this routine is executed, C
PU5 advances the process to step SC1, and performs breath pressure sensor 4a
It is determined whether any of .about.4c is generating an output. Here, when the expiration is not inhaled from the outlet 3a, the breath pressure sensors 4a to 4c do not generate an output, so that the determination result is "NO", and the process proceeds to Step SC2. At step SC2, the register LV is reset to zero, indicating that the key is in the key-off state.

On the other hand, when any of the breath pressure sensors 4a to 4c generates an output, that is, when expiration is blown from the outlet 3a, the result of the determination in step SC1 is "YE
S ", and the process proceeds to Step SC3. In step SC3, the respective outputs (breath pressure data) of the breath pressure sensors 4a to 4c are stored in the registers fLA to fLC. Subsequently, in step SC4, the maximum of the breath pressure data stored in the registers fLA to fLC is stored. Detect level. Next, in step SC5, the octave data corresponding to the breath pressure sensor that generated the maximum level output is stored in the ROM
6 is read out with reference to the octave conversion table stored therein, and stored in the register OC.

This octave conversion table is used to designate a pitch octave control amount determined by a fingering operation, using the identification number of the breath pressure sensor that has generated the maximum level output as a read address. FIG. 9 is a diagram illustrating an example of the octave conversion table. For example, when the breath pressure sensor 4a generates the maximum level,
When the expiration inspired from is in the direction A shown in FIG. 4, the pitch is calculated as "+1 octave" from this octave conversion table.
Octave data to be raised is read. Similarly 3
When the exhalation blown from a is in the direction B shown in FIG. 4, the breath pressure sensor 4b generates the maximum level, so the octave data from the table becomes "0", and the pitch is determined by the fingering operation. Will be pronounced.

Further, when the exhalation blown from the outlet 3a is in the direction C shown in FIG. 4, the breath pressure sensor 4c generates the maximum level, so that the octave data from the table becomes "-1". In the octave conversion table shown in FIG. 9, when the breath pressure sensors 4a, 4b, 4c all have the same output level, or when the breath pressure sensors 4a, 4c
Is the maximum output level, the octave data becomes "0", and the pitch data corresponding to the fingering operation becomes the pronunciation pitch as it is. When the breath pressure sensors 4a and 4b are at the maximum output level, the octave data is "+1".
When the breath pressure sensors 4b and 4c are at the maximum output level, the octave data is "-1". And
When the octave data is set in the register OC, C
PU5 advances the process to step SC6. Step SC
In step SC3, the register fL
Breath pressure sensors 4a to 4c respectively stored in A to fLC
Are read out and added, and these are written in the register LV, followed by terminating the routine.

Next, when the above-described sensor processing routine is completed, the CP
U5 advances the process to step SA4 (see FIG. 5) and returns to FIG.
Is executed. When this routine is executed, the CPU 5 advances the processing to step SD1.
It is determined whether each output sum of the breath pressure sensors 4a to 4c stored in the register LV is equal to or more than a predetermined value. Here, if the value is equal to or more than the predetermined value, it is regarded as key-on, and the determination result is “Y”.
ES ”, and the process proceeds to the next Step SD2. In step SD2, a tone generation instruction corresponding to each value of the registers LV, PT, and OC is given to the sound source unit 8.

Thus, the tone generator 8 sets the pitch to be generated based on the pitch data stored in the register PT and the octave data stored in the register OC, while setting the pitch to be generated according to the value of the register LV. Set the volume level. On the other hand, in step SD1, the register LV
Is smaller than the predetermined value, the judgment result is “NO”.
And proceeds to step SD3. In step SD3,
It is assumed that no exhalation has been blown, and it is regarded as a key-off, and the sound source unit 8 is instructed to mute. Thus, in the first embodiment,
A plurality of breath pressure sensors 4a to 4c are provided inside the mouthpiece, and the air outlet 3 is provided in accordance with the output of the breath pressure sensors 4a to 4c.
Since the direction of the exhalation blown into a is detected and the octave is controlled in accordance with the detection result, it is possible to obtain a feeling of playing that is very close to a natural musical instrument.

C. Second Embodiment Next, a second embodiment according to the present invention will be described. The second embodiment has an appearance shape imitating a "flute" as in the first embodiment described above. FIG. 10 is a block diagram showing the configuration of the second embodiment, and the first embodiment shown in FIG.
The same components as those in the embodiment are denoted by the same reference numerals, and description thereof will be omitted. The configuration shown in FIG. 10 is different from that of the first embodiment in that a direction sensor
-10c, and these speed sensors 10a-1
A conversion table 11 for converting and controlling a pitch determined according to a fingering operation based on each output of 0c is provided. Hereinafter, these points will be sequentially described.

First, referring to FIG.
Will be described. The direction sensor unit 10 includes speed sensors 10a to 10c that generate a speed signal according to the exhalation blown from the mouth 3a of the mouthpiece 3. The speed sensors 10a to 10c are respectively
The fan F is rotatably supported in accordance with the exhalation blown from the fan F, and a speed generator G for generating an output signal corresponding to the rotation speed of the fan F. As shown in FIG. 12, the speed sensors 10a to 10c
The fan F is fixed along the inner wall of the tube body 1 facing a, and the fan F rotates in the CW (clockwise) direction or the CCW (counterclockwise) direction according to the exhaled breath. Here, it is considered that the fan F basically rotates only in response to the primary flow (direct flow) of exhalation, and the fan F rotates in the CW (clockwise) direction shown in the drawing. if you did this,
The speed generator G generates a negative (-) output signal,
When rotated in the (counterclockwise) direction, a positive (+) output signal is generated.

Next, the speed sensors 10a to 10a
A conversion table 11 for converting a pitch determined according to a fingering operation based on each output of 10c will be described. The conversion table 11 is a data table constituted by a ROM or the like, and is prepared corresponding to a pitch determined according to a fingering operation of the tone key 2. Here, the conversion table 11 will be described with reference to FIG. Table 11 shown in this figure is a table which is selected when the tone key 2 has operated fingering to specify the C ₄ sounds. In this table, RE1 and RE2 are speed sensors 10a, respectively.
10 to 10c, and the output characteristics of these speed sensors 10a to 10c are connected to form four-stage conversion areas ST1 to ST4.

In such a conversion table 11, for example, when exhalation is blown in the direction A shown in FIG.
Speed sensor 10c is rotated in the CW direction, the conversion zone ST1 is selected, C ₄ sound determined by the fingering operation lowers one octave, a C ₃ sound. When the expiration is blown in the direction B shown in FIG. 12, the speed sensor 10b rotates in the CW direction and the speed sensor 10c rotates in the CCW direction, so that the conversion area ST2 is selected. Thus not converted is C ₄ sound determined by the fingering operation, directly becomes the sound pitch. Thereafter, similarly, when exhalation is blown in the direction C shown in FIG. 12, the conversion area ST3 is selected and the level is raised by +1 octave. Further, when the expiration is blown in the direction D, the conversion area ST4 is selected and the level is increased by +2 octaves.

D. Operation of the Second Embodiment Next, the operation of the second embodiment that performs pitch conversion using the above-described conversion table 11 will be described. Here,
A description will be given of a sensor processing routine and a sound generation processing routine that are different from those of the above-described first embodiment. The other routines are the same as those of the first embodiment, and a description thereof will be omitted.

Operation of Sensor Processing Routine First, pitch data corresponding to a fingering operation is set in a register PT, and the above-described switch processing routine (see FIG. 6)
Is completed, the CPU 5 proceeds to step S of the main routine.
The sensor processing routine shown in FIG. 14 is executed via A3. When this routine is executed, the CPU 5 advances the process to step SE1, and determines whether any of the speed sensors 10a to 10c is generating an output. here,
When the expiration is not inhaled from the outlet 3a, the speed sensor 10a to 10c does not generate any output, so that the determination result is "NO", and the process proceeds to Step SE2. In step SE2, the register LV is reset to zero, indicating that the key is in the key-off state.

On the other hand, when any of the speed sensors 10a to 10c generates an output, that is, when expiration is blown from the outlet 3a, the result of the determination in step SE1 is "Y".
ES ”, and the process proceeds to step SE3. In step SE3, each output (speed data) of the speed sensors 10a to 10c is fetched, and the rotation direction of the fan F in each of the sensors 10a to 10c is detected. Then, step S
When the process proceeds to E4, the speed data generated according to the outputs of the sensors 10a to 10c are sequentially stored in the registers fL1 to fL3, and the process proceeds to the next step SE5.

In step SE5, a conversion table 11 corresponding to the pitch data stored in the register PT is selected, and a conversion value corresponding to the rotation direction of each fan F is read out from the selected conversion table 11 and stored in the register PP. set. Here, for example, if it is pitch data is stored representing the C ₄ sound register PT, the conversion table 11 illustrated in FIG. 13 is selected, the conversion zone ST1 based on the rotation direction of the fan F is determined, the register The converted value of “C ₃ ” is set in PP. continue,
In step SE6, the speed data stored in the registers fL1 to fL3 are converted into absolute values, the sum of these is calculated and stored in the register LV, and this routine is completed.

Operation of the sound processing routine When the sensor processing routine according to the second embodiment is completed, the CPU 5 proceeds to step SA4 (see FIG. 5).
The sound processing routine shown in FIG. When this routine is executed, the CPU 5 proceeds to step SF1
To the speed sensor 1 stored in the register LV.
It is determined whether each output sum of 0a to 10c is equal to or more than a predetermined value. Here, if it is equal to or more than the predetermined value, it is regarded as key-on and the determination result is “YES”, and the next step SF2
Processing proceeds to In step SF2, the registers LV,
A sound generation instruction corresponding to each value of PP is given to the sound source unit 8. Thus, the tone generator 8 synthesizes the musical tone having the pitch corresponding to the value of the register PP so as to have the volume level corresponding to the value of the register LV. On the other hand, in step SF1, if the value of the register LV is less than the predetermined value, the determination result is “NO”, and the process proceeds to step SF3. The sound source unit 8 is instructed to mute.

As described above, in the second embodiment, the plurality of speed sensors 10a to 10c are provided inside the mouthpiece, and the pitch determined according to the fingering operation is determined based on the outputs of the speed sensors 10a to 10c. Since the conversion table 11 for conversion is provided, it is possible to perform octave control according to the direction of expiration to be blown into the outlet 3a, thereby obtaining a performance feeling very close to a natural instrument.

E. Next, a third embodiment according to the present invention will be described. FIG.
FIG. 6 is an external view showing the configuration of an electronic wind instrument according to the third embodiment. The electronic wind instrument illustrated in FIG. 1 simulates a trumpet, and includes a plurality of tone levers 11 and a mouthpiece 3 disposed on the tubular body 1. The third embodiment having such an external structure has the same electrical configuration as that obtained by replacing the tone key 2 shown in FIG. The third embodiment differs from the second embodiment in that the octave control is performed based on the outputs of the breath pressure sensors 4a to 4c. Hereinafter, this will be described in detail.

First, FIG. 17 is a sectional view showing the arrangement of the breath pressure sensors 4a to 4c arranged on the cup 3b inside the mouthpiece 3. The rim of the mouthpiece 3 is fitted with a closing member 3c having a concave cross section and a slit having a predetermined width, and the cup 3 is inserted along the closing member 3c.
The breath pressure sensors 4a to 4c are radially arranged in b. Therefore, when expiration in parallel to the rim surface is blown, the breath pressure sensor 4b generates an output signal of the maximum level. When the expiration is blown obliquely upward or downward with respect to the rim surface, the breath pressure sensor 4a,
Alternatively, the breath pressure sensor 4c generates a maximum level output signal.

Next, the contents of the conversion table 11 used in the third embodiment will be described with reference to FIGS. The conversion table 11 is composed of a ROM or the like as described above, and in this case, a first
It stores a conversion table 11a, a second conversion table 11b, and a third conversion table 11c. The first conversion table 11a is a table that generates the sensor values WMtpa and WMtpc for calculation using the breath pressure data Da and Dc generated in response to the output signals of the breath pressure sensors 4a and 4c as read addresses. As shown in (a), it is defined by a step-like nonlinear function. The same figure (b)
Is a second conversion table 11b that generates an arithmetic sensor value WMtpb using the breath pressure data Db generated in response to the output signal of the breath pressure sensor 4b as a read address,
This is also defined by a step-like non-linear function as in FIG.

The third conversion table 11c is provided with an arithmetic sensor value W read out via the first conversion table 11a.
A conversion value is generated using a calculation value CD obtained by substituting Mtpa and WMtpc and the calculation sensor value WMtpb read via the second conversion table 11b into the conversion formula (1) as a read address. The above conversion formula (1) is defined as follows. Calculated value CD = (WMtpb− | WMtpa−WMtpc |) / 2 + WMtpa−WMtpc (1) The third conversion table 11c is provided corresponding to each pitch determined by the fingering operation of the tone lever 11. .

F. Operation of Third Embodiment Next, the above-described first to third conversion tables 11a to 11a-1
The operation of the third embodiment for performing pitch conversion control using 1c will be described. Here, a description will be given of a sensor processing routine and a sound generation processing routine which are different from those of the above-described first embodiment, and other routines are common to those of the first embodiment.

Operation of Sensor Processing Routine When pitch data corresponding to the fingering operation is set in the register PT and the above-described switch processing routine (see FIG. 6) is completed, the CPU 5 proceeds to step SA3 of the main routine.
The sensor processing routine shown in FIG. 20 is executed via (see FIG. 5). When this routine is executed, the CPU 5 advances the process to step SG1, and determines whether any of the breath pressure sensors 4a to 4c is generating an output. Here, when no exhalation is blown into the mouthpiece 3, the result of the determination is "NO" because none of the breath pressure sensors 4a to 4c generate an output, and the process proceeds to step SG2. At step SG2, the register LV is reset to zero, indicating that the key is in the key-off state.

On the other hand, when any of the breath pressure sensors 4a to 4c generates an output, that is, when exhalation is inhaled, the result of the determination in step SG1 becomes "YES", and the process proceeds to step SG3. In step SG3, the breath pressure data Da, Db, and Dc generated corresponding to each output of the breath pressure sensors 4a to 4c are fetched and stored in the register t.
Stored in pa, tpb and tpc, respectively. Then, CP
When the process of U5 proceeds to step SG4, the breath pressure data Da, Da stored in these registers tpa, tpb, tpc
First conversion table 11a described above based on Db and Dc
The CPU reads the calculation sensor values WMtpa, WMtpb, and WMtpc with reference to the second conversion table 11b and stores the calculation value CD obtained by substituting these values into the conversion formula (1) in the register PD.

Here, for example, expiration is blown in the direction shown in FIG. 21 (b), and the breath pressure data Da,
The first conversion table 11a and the second conversion table 11a are based on Db and Dc.
It is assumed that the computation sensor values WMtpa, WMtpb, and WMtpc read with reference to the conversion table 11b are "60", "120", and "40", respectively.
Then, the calculated value CD becomes “70” from the conversion formula (1) described above, and this is set in the register PD.

Next, at step SG5, the third conversion table 11c corresponding to the pitch data stored in the register PT is selected, and the selected conversion table 1c is selected.
From 1c, the conversion value corresponding to the operation value CD stored in the register PD is read and set in the register PI. Here, for example, if the register PT is pitch data is stored representing the C ₄ sound conversion table shown in FIG. 19 11
It is assumed that c is selected. Then, in the above example, arithmetic value CD is "70" and, referring to the third conversion table 11c Correspondingly, sound pitch becomes C ₅ sound (Fig. 2
1 (b)). That is, the pitch specified by the fingering operation is raised by “+1” octave, and in this case, the converted value is “C ₅ ”. When the conversion value is determined in this way, C
PU5 proceeds to step SG6, where the registers tpa, tp
breath pressure data Da and D stored in b and tpc, respectively
The sum of b and Dc is calculated and stored in the register LV, and this routine is completed.

Operation of the Sound Processing Routine When the sensor processing routine according to the third embodiment is completed as described above, the CPU 5 executes the sound processing routine shown in FIG. 22 via step SA4 (see FIG. 5). When this routine is executed, the CPU 5 advances the process to step SH1, and determines whether or not the sum of the breath pressure data Da, Db, Dc stored in the register LV is equal to or more than a predetermined value. Here, if it is equal to or more than the predetermined value, it is regarded as key-on and the determination result is "YES", and the next step S
The process proceeds to H2. In step SH2, the register L
A tone generation instruction corresponding to each value of V and PI is given to the sound source unit 8.
As a result, the tone generator 8 controls the tone according to the conversion value stored in the register PI, while controlling the tone volume of the tone in the register L.
Control is performed according to the value of V. On the other hand, in step SH1, if the value of the register LV is less than the predetermined value, the determination result is “NO”, and the process proceeds to step SF3. The sound source unit 8 is instructed to mute.

As described above, in the third embodiment, the first and second breath pressure data Da, Db, Dc corresponding to the respective outputs of the breath pressure sensors 4a to 4c provided inside the mouthpiece 3 are used. The calculation sensor values WMtpa, WMtpb, WMtpc are obtained by referring to the conversion tables 11a, 11b, and further, these calculation sensor values WMtpa, WMt are obtained.
Since the conversion value is obtained by referring to the third conversion table 11c in accordance with the calculation value CD obtained from pb and WMtpc, it is possible to perform pitch conversion control in accordance with the direction of the exhalation blown into the mouthpiece 3, thereby making it extremely possible. It is possible to obtain a feeling of performance close to a natural musical instrument.

G. Modification Next, a modification of the above-described third embodiment will be described.
In this modification, speed sensors 10a to 10c are provided in place of the above-described breath pressure sensors 4a to 4c. That is, as shown in FIGS. 23 and 24, the speed sensors 10a to 10c are radially arranged in the cup 3b along the closing member 3c having a slit of a predetermined width, and blown through the slit of the closing member 3c. The fan F rotates in response to the exhaled air, and the speed generator G generates an output signal corresponding to the rotation speed of the fan F. According to such a structure, similarly to the above-described second embodiment, it is possible to detect the direction of expiration based on the outputs of the speed sensors 10a to 10c, and perform pitch conversion control according to the result. Become.

H. Another Modification Next, another modification will be described with reference to FIG.
This modification basically has the same electrical configuration as that of the above-described third embodiment. The difference from the third embodiment is that a drive circuit 20 is provided, and the above-described speed generator G operates as a drive motor. That is, a configuration for rotating and driving the fan F is added. As shown in FIG. 26, the driving circuit 20
Current control circuits 20a to 20c for controlling a drive current input to a drive motor (speed generator) G in accordance with a current control signal supplied from PU5, and an output polarity of current control circuit 20b based on a control signal from CPU5. And a polarity inverter 20d for inverting. Note that the fan F and the drive motor G form wind pressure generating means WG1 to WG3. As shown in FIG. 27, the wind pressure generating means WG1 to WG3 are arranged so as to be interposed between the breath pressure sensors 4a to 4c arranged along the slit of the closing member 3c and the slit.

According to the above configuration, the direction of the exhalation blown through the slit is detected based on each output of the breath pressure sensors 4a to 4c, and the pitch determined by the fingering operation according to the direction is detected. Octave control. Further, the wind pressure generating means WG1 to WG3 are driven in accordance with the detected direction of the exhalation to give the player's lips an airflow facing the exhalation direction. Thus, the player can know the direction of expiration from the airflow hitting the lips, and can perform a lip reed training in which the direction of exhalation is changed according to the shape of the lips to control the pitch of pronunciation.

As described above, in the first embodiment,
A plurality of breath pressure sensors 4a to 4c are provided inside the mouthpiece, and the air outlet 3 is provided in accordance with the output of the breath pressure sensors 4a to 4c.
Since the direction of the exhalation blown into a is detected and the octave is controlled in accordance with the detection result, it is possible to obtain a feeling of playing that is very close to a natural musical instrument. In the second embodiment, a plurality of speed sensors 10a to 10c are provided inside the mouthpiece, and a conversion table 11 for converting a pitch determined in accordance with a fingering operation based on each output of these speed sensors 10a to 10c. Is provided, it is possible to perform octave control according to the direction of expiration to be blown into the outlet 3a.

In addition, in the third embodiment, the first and second conversion tables are based on the breath pressure data Da, Db, Dc corresponding to the respective outputs of the breath pressure sensors 4a to 4c provided inside the mouthpiece. 11a and 11b are referred to to calculate sensor values for calculation WMtpa, WMtpb and WMtpc, and further, these sensor values for calculation WMtpa, WMtpb and W
Since the conversion value is obtained by referring to the third conversion table 11c according to the calculation value CD obtained from Mtpc, the pitch conversion control can be performed according to the direction of the exhalation blown into the mouthpiece 3. In each of the above embodiments, the pitch control is performed according to the direction of exhalation blown into the mouthpiece.However, the present invention is not limited to this. For example, digital filtering is performed according to the direction of exhalation. It is also possible to control the timbre by changing the overtone composition of the musical tone to be generated. By doing so, an electronic wind instrument that more closely matches the actual sounding mechanism can be obtained.

[0045]

According to the present invention, the pitch specifying means provided with a finger-operated operation element generates pitch information corresponding to the fingering operation, and is fitted to one end of the tubular body. Detection means provided inside the mouthpiece detects the direction of expiration blown through the mouthpiece. Then, the pitch control means performs pitch conversion control on the pitch information in accordance with the expiration direction detected by the detection means and indicates the pitch to be generated.
Pitch conversion control can be performed according to the direction of exhalation blown into the mouthpiece.

[Brief description of the drawings]

FIG. 1 is a view showing an appearance of a first embodiment according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a first embodiment.

FIG. 3 is a perspective view for explaining an arrangement relationship of breath pressure sensors 4a to 4c in the first embodiment.

FIG. 4 is a cross-sectional view for explaining an arrangement relationship of breath pressure sensors 4a to 4c in the first embodiment.

FIG. 5 is a flowchart showing an operation of a main routine in the first embodiment.

FIG. 6 is a flowchart illustrating an operation of a switch processing routine according to the first embodiment.

FIG. 7 is a flowchart illustrating an operation of a sound generation processing routine in the first embodiment.

FIG. 8 is a flowchart showing an operation of a sensor processing routine in the first embodiment.

FIG. 9 is a diagram illustrating an example of an octave conversion table according to the first embodiment.

FIG. 10 is a block diagram showing a configuration of a second embodiment.

FIG. 11 shows speed sensors 10a to 10 in the second embodiment.
It is a perspective view for explaining arrangement relation of c.

FIG. 12 shows speed sensors 10a to 10 in the second embodiment.
It is a perspective view for explaining arrangement relation of c.

FIG. 13 is a diagram illustrating an example of a conversion table 11 according to the second embodiment.

FIG. 14 is a flowchart illustrating an operation of a sensor processing routine according to the second embodiment.

FIG. 15 is a flowchart illustrating an operation of a sound generation processing routine according to the second embodiment.

FIG. 16 is an external view showing the external appearance of the third embodiment.

FIG. 17 is a cross-sectional view for explaining an arrangement relationship of breath pressure sensors 4a to 4c in a third embodiment.

FIG. 18 shows a first conversion table 11a according to the third embodiment.
FIG. 6 is a diagram illustrating an example of a second conversion table 11b.

FIG. 19 shows a third conversion table 11c according to the third embodiment.
It is a figure showing an example of.

FIG. 20 is a flowchart illustrating the operation of a sensor processing routine according to the third embodiment.

FIG. 21 is a diagram for explaining the operation of the third embodiment.

FIG. 22 is a flowchart showing an operation of a sound emission processing routine in the third embodiment.

FIG. 23 is a perspective view for explaining an arrangement relationship of speed sensors 10a to 10c in a modified example.

FIG. 24 is a cross-sectional view for explaining an arrangement relationship of speed sensors 10a to 10c in a modified example.

FIG. 25 is a block diagram showing a configuration in another modification.

FIG. 26 is a block diagram showing a configuration of a drive circuit 20 according to another modification.

FIG. 27 shows breath pressure sensors 4a to 4 in other modified examples.
FIG. 4 is a cross-sectional view for explaining an arrangement relationship between the air pressure generating means c and wind pressure generating means WG1 to WG3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube part (tube part) 2 Tone key (operator) 3 Mouthpiece (mouthpiece) 4 Direction sensor part (detection means) 5 CPU (pitch designation means, pitch control means) 6 ROM 7 RAM

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 1/00 G10H 1/053 G10H 1/34

Claims (4)

(57) [Claims] 1. A pitch specifying means for providing a pitching operation corresponding to a fingering operation, comprising: a manipulator operated by a fingering operation; and a pitch designation means provided inside a mouthpiece fitted to one end of a tubular body. Detecting means for detecting the direction of expiration blown through the mouthpiece; and performing pitch conversion control of the pitch information in accordance with the expiration direction detected by the detecting means to indicate a pitch to be emitted. An electronic wind instrument comprising: 2. An electronic wind instrument according to claim 1, wherein said detecting means includes a plurality of pressure sensors, and determines the direction of the expiration according to an output signal output from the pressure sensors. 3. The electronic wind instrument according to claim 1, wherein said detecting means includes a plurality of speed sensors, and determines the direction of the expiration according to an output signal output from the speed sensors. 4. The electronic wind instrument according to claim 1, wherein said pitch control means includes a conversion table in which said exhalation direction is associated with a pitch conversion control value.