JP6786982B2 - An electronic musical instrument with a reed, how to control the electronic musical instrument, and a program for the electronic musical instrument. - Google Patents

Description

The present invention relates to an electronic musical instrument having a lead, a method for controlling the electronic musical instrument, and a program for the electronic musical instrument.

In acoustic wind instruments (woodwind instruments that use reeds, such as saxophones and clarinets), changes in the position and pressure of the lips and tongue that touch the reeds change the tone of the musical tones, realizing a variety of musical expressions.

Patent Document 1 discloses an electronic wind instrument that electronically synthesizes and outputs musical tones. In this electronic wind instrument, a plurality of pressure-sensitive lip sensors (pressure-sensitive sensors) are arranged on the reed, and the positions of the lips and the tongue are detected to control the musical sound.

Japanese Unexamined Patent Publication No. 7-72853

By the way, in an electronic musical instrument including a lead, a plurality of detection units for detecting a contact state of the lip are provided in order to obtain a lip position or the like on the lead.
When the performer's lip is located so as to extend over the area where the detection unit is arranged, the contact area of the lip in contact with the detection unit is reduced, and the output value output from the detection unit is reduced. Becomes smaller.

In such a state, if the output value is output from the detection unit where the lip is not in contact due to the influence of noise or the like, the ratio of the output value output due to the influence of noise or the like increases relatively. , A large error may occur in the calculation for determining the position of the lip on the lead, and the performer may make an unintended pronunciation.

The present invention has been made in view of such circumstances, and is an electronic musical instrument that is not easily affected by noise even when the performer's lip greatly extends over the area where the detection unit is arranged. An object of the present invention is to provide a method for controlling a musical instrument and a program for the electronic musical instrument thereof.

In order to achieve the above object, the present invention is grasped by the following configuration.
The electronic musical instrument of the present invention has a lead provided with a plurality of detection units for detecting the contact state of the lip from the tip end portion to the base end portion, and the lip on the lead based on the output value of the detection unit. The control unit includes a control unit for determining the position of the center of gravity, and the control unit includes a first process of determining the detection unit that outputs the output value equal to or higher than the threshold value, and the output of the threshold value or higher by the first process. A process including a second process of determining the position of the center of gravity based on the output value of the detection unit determined to output a value is executed.

The method for controlling an electronic musical instrument according to the present invention is a method for controlling an electronic musical instrument including a lead provided with a plurality of detection units for detecting a contact state of a lip from a tip portion to a base end portion, and is equal to or higher than a threshold value. The position of the center of gravity of the lip on the lead is determined by using the first step of obtaining the detection unit that outputs the output value and the output value corresponding to the detection unit obtained by the first step. Including the second step.

The program for an electronic musical instrument according to the present invention has an output value equal to or higher than a threshold value in a control unit of an electronic musical instrument including a lead provided with a plurality of detection units for detecting a contact state of a lip from a tip portion to a base end portion. The position of the center of gravity of the lip on the lead is determined by using the first process for obtaining the detection unit that outputs the above and the output value corresponding to the detection unit obtained by the first processing. The process and the process including the process are executed.

According to the present invention, an electronic musical instrument that is not easily affected by noise even when the performer's lip greatly extends beyond the area where the detection unit is arranged, a control method for the electronic musical instrument, and the electronic musical instrument. A program can be provided.

(A) is a plan view of the electronic musical instrument according to the embodiment of the present invention, and (b) is a side view of the electronic musical instrument. It is a block diagram which shows the functional structure of an electronic musical instrument. (A) is a cross-sectional view showing a mouthpiece, and (b) is a bottom view showing a mouthpiece. It is a figure which shows the contact state between the oral cavity of the performer P and a mouthpiece. (A) is a bottom view and a sensor output value of the reed contacted in the lip contact range C1, (b) is a bottom view and a sensor output value of the reed contacted in the lip contact range C2, and (c) is a diagram. It is a figure which shows the bottom view and the sensor output value of the reed which made contact in the lip contact range C2 and the tongue contact range C3. It is a figure which shows typically the detection part included in the lead. It is a table which shows an example of the output value and the position of the center of gravity when there is no noise and when there is noise in 1st Embodiment. It is a graph corresponding to FIG. It is a table which shows other example of the output value and the position of the center of gravity in the case where there is no noise and when there is noise in 1st Embodiment. It is a graph corresponding to FIG. It is a table which shows another example of the output value and the position of the center of gravity when there is no noise and when there is noise in 1st Embodiment. It is a graph corresponding to FIG. It is a flowchart which shows the procedure of determining the position of the center of gravity in 1st Embodiment. It is a figure which shows typically the detection part and the virtual detection part included in the lead in 2nd Embodiment. It is a table which shows an example of the output value and the position of the center of gravity when there is no virtual output and when there is a virtual output in the second embodiment. It is a graph corresponding to FIG. It is a flowchart which shows the procedure of determining the position of the center of gravity in 2nd Embodiment.

In the following, first, the basic contents of the electronic musical instrument 100 including the lead 11 for the electronic musical instrument (hereinafter, also simply referred to as the lead 11) used in the embodiment of the present invention will be described, and then the basic contents for the electronic musical instrument will be described. The lead 11 of the above will be described in detail.

[Electronic musical instruments and leads for electronic musical instruments]
FIG. 1A is a plan view of the electronic musical instrument 100 according to the embodiment of the present invention, and FIG. 1B is a side view of the electronic musical instrument 100.

The electronic musical instrument 100 is an electronic musical instrument that expresses a performance according to the playing method (for example, pitch bend or vibrato) of an acoustic wind instrument which is a woodwind instrument using a lead.

In the present embodiment, an example in which the electronic musical instrument 100 is a saxophone will be described, but the present invention is not limited to this, and the electronic musical instrument 100 may be applied to electronic musical instruments of other wind instruments using reeds such as a clarinet.

(Electronic musical instrument)
As shown in FIGS. 1A and 1B, the electronic musical instrument 100 includes a tube body 100a, an operator 1, a sound system 9 on the tube body 100a, and a mouthpiece 10.
The shape of the electronic musical instrument 100 imitates the shape of a saxophone of an acoustic wind instrument.

The tube body portion 100a is a housing portion of the main body having a shape imitating the tube body portion of the saxophone.
The operator 1 is an operation unit operated by the performer P (user) with a finger, and is a performance key for determining the pitch, a function for changing the pitch according to the key of the music, a function for finely adjusting the pitch, and the like. Includes a setting key to set.

The mouthpiece 10 is a component operated by the performer P in the oral cavity, and details will be described later.
The sound system 9 is a component that has a speaker or the like and outputs musical sounds.

Further, as shown in a partially transparent portion of the electronic musical instrument 100 of FIG. 1A, a breath pressure detection unit 2 and a CPU (Central Processing Unit) as a control means are placed on a substrate provided inside the tube body 100a. 5, ROM (Read Only Memory) 6, RAM (Random Access Memory) 7, and sound source 8 are provided.

The breath pressure detection unit 2 is a sensor that detects the breath pressure (breath pressure) blown into the mouthpiece 10 by the performer P.
The sound source 8 is a circuit that generates a musical tone.
The CPU 5, ROM 6, and RAM 7 will be described later.

Next, the functional configuration of the electronic musical instrument 100 will be described with reference to FIG. FIG. 2 is a block diagram showing a functional configuration of the electronic musical instrument 100.

As shown in FIG. 2, the electronic musical instrument 100 includes an operator 1, a breath pressure detection unit 2, a lip detection unit 3, a tongue detection unit 4, a CPU 5, a ROM 6, a RAM 7, a sound source 8, and a sound. It includes a system 9.
The lip detection unit 3 and the tongue detection unit 4 are included in the lead 11 provided on the mouthpiece 10 (see FIG. 3).
Further, each part of the electronic musical instrument 100 except the sound system 9 is connected to each other via a bus 9a.

As described above, the operator 1 has various keys such as a performance key and a setting key, receives various key operations from the performer P, and outputs the operation information to the CPU 5.
The setting keys set the tone color setting function, the function of changing the pitch according to the key of the music, and the function of finely adjusting the pitch, and the contact position of the lip L and the lip L detected by the lip detection unit 3. It is a key to set the function to select in advance the mode to be finely adjusted according to the contact area of the music from the tone, volume, and pitch of the musical tone.

The breath pressure detection unit 2 detects the breath pressure of the breath blown into the mouthpiece 10 by the performer P, and outputs the breath pressure information to the CPU 5.

The lip detection unit 3 is a capacitance type touch sensor that detects the contact of the lip (lips) L of the player P, and has a capacitance corresponding to the contact position of the lip L and the contact area of the lip L in the touch sensor. Is output to the CPU 5 as the detection information of the lip L.
The calculation of the contact position (center of gravity position) of the lip L will be described later.

The tongue detection unit 4 is a capacitance type touch sensor that detects the contact of the tongue (tongue) of the player P, and the capacitance corresponding to the contact area of the tongue in the touch sensor is used as the tongue detection information in the CPU 5. Output.

The CPU 5 controls each part of the electronic musical instrument 100.
The CPU 5 reads a program designated from the ROM 6 and expands it into the RAM 7, and executes various processes in cooperation with the expanded program.

More specifically, the CPU 5 includes the operation information input from the operator 1, the breath pressure information input from the breath pressure detection unit 2, and the contact detection information of the lip L input from the lip detection unit 3. , Instructs the sound source 8 to generate a music sound based on the tongue contact detection information input from the tongue detection unit 4.

For example, the CPU 5 sets the pitch of the musical tone based on the pitch information as the operation information input from the operator 1, and the volume of the musical tone is based on the breath pressure information input from the breath pressure detection unit 2. Is set, and at least one of the tone, volume, and pitch of the musical tone is set according to the output value (electrostatic capacity) according to the lip contact position and the lip contact area based on the detection information of the lip L input from the lip detection unit 3. Is finely adjusted, and the note on / off of the musical tone is set based on the contact detection information of the tongue (tongue) input from the tongue detection unit 4.

The ROM 6 is a read-only semiconductor memory that stores various data and various programs.
The RAM 7 is a volatile semiconductor memory and has a work area for temporarily storing data and programs.

The sound source 8 is a synthesizer, and is an instruction to generate a musical tone of the CPU 5 based on the operation information of the operator 1, the detection information of the lip L from the lip detection unit 3, and the detection information of the tongue from the tongue detection unit 4. Control), a musical tone is generated and a musical tone signal is output to the sound system 9.
The sound source 8 has an LPF that filters the musical sound signal, but the LPF may be provided between the sound source 8 and the sound system 9 or in the sound system 9.

The sound system 9 amplifies the musical sound signal input from the sound source 8 and outputs it as a musical sound from the built-in speaker.

(Mouthpiece and lead)
Next, the basic contents of the mouthpiece 10 will be described with reference to FIGS. 3 and 4.
FIG. 3A is a cross-sectional view showing the mouthpiece 10, and FIG. 3B is a bottom view showing the mouthpiece 10.
In FIG. 3A, the mouth side of the performer P is referred to as a “tip” (corresponding to the tip portion of the present invention) along the longitudinal direction of the mouthpiece 10, and the tube body portion 100a side is referred to as a “heel” ( It corresponds to the base end portion of the present invention).

As shown in FIGS. 3A and 3B, the mouthpiece 10 has a mouthpiece main body 10a, a reed 11 for an electronic musical instrument, and a fixing bracket 12.

The mouthpiece body 10a is a body component of the mouthpiece having an opening 13 into which the performer P breathes, and is connected to the tube body 100a.

The reed 11 is provided below the mouthpiece main body 10a, that is, corresponding to the reed position of the acoustic wind instrument.
The lead 11 is fixed to the mouthpiece main body 10a by the fixing bracket 12.

As shown in FIG. 3B, the lead 11 has a substrate and a plurality of detection units 40, 31 to 39 provided on the substrate.
The plurality of detection units 40, 31 to 39 are provided on the substrate in a state of being aligned from the tip to the heel.
The detection unit 40 is an electrode unit of the capacitance type touch sensor S10 included in the tongue detection unit 4.

The detection units 31 to 39 are electrode units of the capacitance type touch sensors S21 to S29 included in the lip detection unit 3.
The detection units 31 to 39 are arranged at substantially equal intervals from the tip side of the lead 11 toward the heel side, and have substantially the same width.

FIG. 4 is a diagram showing a contact state between the oral cavity of the performer P and the mouthpiece 10.
As shown in FIG. 4, when playing the electronic musical instrument 100, the performer P puts the upper front tooth E1 on the upper part of the mouthpiece main body 10a, winds the lower front tooth E2 with the lower lip L, and touches the lead 11. ..
In this way, the mouthpiece 10 is held by the upper anterior teeth E1 and the lip L.

The tongue inside the oral cavity during performance is either a tongue T1 (solid line) in a state of touching the lead 11 or a tongue T2 (broken line) in a state of not touching the lead 11 depending on the playing method.
Then, the touch sensors S10, S21 to S29 detect the contact state of the lip L and the tongue (tan T1: contact or tongue T2: non-contact) with the detection units 40, 31 to 39, and transmit the detection information to the CPU 5. Output.

As will be described in detail later, the CPU 5 calculates the contact position (center of gravity position) of the lip L on the lead 11 according to the detection information output from the touch sensors S21 to S29.
Further, the CPU 5 determines that the tongue has touched based on the detection information output from the touch sensor S10.

(Output characteristics of lip detector and tongue detector)
The output characteristics of the lip detection unit 3 and the tongue detection unit 4 will be described with reference to FIG. 5 (a) is a bottom view of the lead 11 contacted in the lip contact range C1 and a sensor output, and FIG. 5 (b) is a bottom view and a sensor output of the lead 11 contacted in the lip contact range C2, (c). ) Is a bottom view and a sensor output of the leads 11 that are in contact with each other in the lip contact range C2 and the tongue contact range C3.

In the graphs showing the sensor outputs in FIGS. 5A to 5C, the horizontal axis represents the position on the lead 11, and the vertical axis represents the output intensity (output voltage) of the touch sensor S corresponding to each of the detection units. It is represented in a bar graph.
However, in FIG. 5, for convenience, the detection units 36 to 39 and the output intensities corresponding to these detection units 36 to 39 are omitted.

As shown in FIG. 5A, when the performer P contacts the lip L so as to hit the lip contact range C1 most strongly, the output intensity of the touch sensor S22 in the detection unit 32 corresponding to the lip contact range C1 becomes maximum. Is obtained.

Further, as shown in FIG. 5B, when the performer P contacts the lip L so as to hit the lip contact range C2 most strongly, the touch sensors S23, in the detection units 33 and 34 corresponding to the lip contact range C2, A distribution that maximizes the output intensity of S24 can be obtained.
However, in FIGS. 5A and 5B, the output intensity of the touch sensor S10 in the detection unit 40 is not obtained.

As described above, in the capacitance type touch sensor, not only the detection unit overlapping the lip contact ranges C1 and C2 but also the detection unit adjacent to the overlapping detection unit reacts.
Therefore, as will be described later, the CPU 5 determines the contact center in the lip contact range, that is, the position of the center of gravity as the lip contact position.

Further, as shown in FIG. 5C, when the performer P brings the tongue into contact with the tongue contact range C3 while keeping the lip L in contact with the lip contact range C2, the detection unit 33, which overlaps with the lip contact range C2, Along with the distribution in which the output values of the touch sensors S23 and S24 corresponding to 34 are maximized, a large output value can be obtained in the touch sensor S10 corresponding to the detection unit 40 overlapping the tongue contact range C3.

That is, the CPU 5 calculates the position of the center of gravity of the lip L in order to determine the lip contact position as described later, and whether or not the output value of the touch sensor S10 as the detection information of the tongue detection unit 4 is equal to or higher than a predetermined threshold value. To determine whether the tongue is in contact or not.

(Calculation of the position of the center of gravity of lip L)
The center of gravity (center of gravity position) is calculated based on the output values of the plurality of detection units 31 to 39 and the identifiers (position numbers) of the plurality of detection units 31 to 39. Hereinafter, with reference to FIG. Specifically, a method for calculating the position of the center of gravity of the lip L will be described.
FIG. 6 is a diagram schematically showing the detection units 40, 31 to 39 included in the lead 11.
In FIG. 6, in order to make the following explanation easy to understand, the positions of the detection units 31 to 39 are represented by P1 to P9 from the detection unit 31 side, and the numbers "1" to "9" are assigned to each position. There is.

The contact position (center of gravity position xG) of the lip L with the lead 11 can be calculated by the following equation using the output values mi of the touch sensors S21 to S29 and the position numbers xi of the detection units 31 to 39. ..

ここで、ｎはタッチセンサの数である。
なお、この式は一般に重心位置を算出するときに用いられる式である。

Here, n is the number of touch sensors.
This formula is generally used when calculating the position of the center of gravity.

For example, when the output values of the touch sensors S21 to S29 corresponding to the positions "P1" to "P9" are {0,0,0,0,90,120,150,120,90}, the position of the center of gravity of the lip L xG is

と算出される。

Is calculated.

In the processing as a device, the center of gravity position xG of the lip L is represented by, for example, an integer value (7-bit binary number) from 0 to 127 for processing.
Such conversion to bit representation is the same as conversion to general bit representation, but in the present embodiment, since the position numbers xi of the detection units 31 to 39 are changed from 1 to 9, the position of the center of gravity The minimum value of xG is 1, not 0.

Therefore, in order to assign 0 when the minimum value of the center of gravity position xG is 1, the value obtained by subtracting 1 from the center of gravity position xG (that is, 6.0 in the above example) is used to convert to bit representation. That is, the 6.0 is divided by the maximum number of electrodes, 9, and then multiplied by 127.

[First Embodiment]
Based on the above, the calculation of the position of the center of gravity of the electronic musical instrument according to the first embodiment will be described in detail.
The calculation of the position of the center of gravity is realized by the CPU 5 as a control unit executing the program stored in the ROM 6.

(Relationship between sensor output mode and center of gravity position)
The relationship between the aspect of the output value of the sensor of the lip detection unit 3 and the position of the center of gravity will be described with reference to FIGS. 7 to 12.
7, 9 and 11 are tables showing examples of the output value and the position of the center of gravity of the sensor when there is no noise and when there is noise.

8, 10, and 12 are graphs corresponding to FIGS. 7, 9, and 11, respectively, and the horizontal axis indicates the position on the lead 11 by P1 to P9 corresponding to the detection units 31 to 39. , The vertical axis shows the output value of the sensor, respectively.

First, FIGS. 11 and 12 show an example of the output characteristics of the sensor corresponding to the state in which the performer P holds the lead 11 near the center.
In this example, relatively large output values {128,255,255,255,128} are continuously output over positions P4 to P8, and the output values at positions P1 to P3 and P9 are zero or zero. Small enough to be ignored.

In this state, the output values of the positions P4, P5 and the positions P7 and P8 are often distributed symmetrically with the position P6 as the center.
Therefore, in this state, as illustrated in FIG. 12, the graph showing the output value of the sensor has a chevron shape as a whole.

In this case, if there is no noise as shown in FIG. 12A, the position of the center of gravity is calculated to be 6.0.
On the other hand, if there is noise as shown in FIG. 12B, the position of the center of gravity is calculated to be 5.96, for example, and is slightly deviated from the position of the center of gravity in the state without noise.
However, it is considered that such a shift in the position of the center of gravity does not affect the generated musical tone (pitch, loudness, etc.).
That is, it can be said that the influence of noise on the position of the center of gravity is relatively small.

Next, when the performer P holds the reed 11 deeply beyond the range of the detection units 31 to 39, the sensor output appears as shown in FIGS. 7 and 8, for example.
In this example, the output value at the position P9 on the heel side is relatively large, and the output value at the positions P1 to P8 is negligibly small.
That is, the graph showing the output value of the lip sensor does not form a chevron as a whole.

In this case, if there is no noise as shown in FIG. 8A, that is, if the output values of the positions P1 to P8 are zero, the center of gravity position is calculated to be 9.0 based on the above-mentioned "Equation 1".
On the other hand, if noise {10,10,2} occurs at positions P2, P4, and P5 as shown in FIG. 8B, the center of gravity position is calculated to be 8.1, and the center of gravity position in the noise-free state is 0. There is a large deviation of about 9.

As described above, when the substantial output value excluding noise appears in one detection unit on the heel side, the position of the center of gravity is easily affected by noise.
Although described above on the heel side, the same thing can be said on the tip side even when the output value at the position P1 on the tip side is relatively large and the output value at the positions P2 to P9 is negligibly small. Similarly, the position of the center of gravity is susceptible to noise because it is only awake.

Further, when the performer P holds the heel side of the reed 11, the output values {128,255,255,255} at the positions P6 to P9 near the heel are relatively large, as shown in FIGS. 9 and 10, for example. , The output value at positions P1 to P5 may be negligibly small.
That is, the graph showing the output value of the lip sensor has a chevron shape as a whole, but does not have symmetry.

In this case, if there is no noise as shown in FIG. 10A, that is, if the output values of the positions P1 to P5 are zero, the center of gravity position is calculated to be 7.7. On the other hand, if noise {10,10,2} occurs at positions P2, P4, and P5 as shown in FIG. 10B, the center of gravity position is calculated to be 7.6, and the center of gravity position in the noise-free state is 0. It shifts by about 1.

In this way, when the substantial output value excluding noise appears in several detection parts at the edge on the heel side, the position of the center of gravity is the example described in relation to FIG. 8 (the actual output value is only the position P9). (In the case of), it will be affected by noise, if not as much.
That is, to summarize what has been described with reference to FIGS. 8, 10 and 12, the number of detection units that output the output value due to the contact of the lip L is biased toward the heel side, and moreover, the detection units of the detection unit The smaller the number, the more susceptible the calculation of the center of gravity position to noise.

Although the description has been made on the heel side in the above, the same applies to the tip side, and the number of detection units for which the output value due to the contact of the lip L is output is biased to the tip side, and the number of the detection units is large. The smaller the number, the more susceptible the calculation of the center of gravity position to noise.

Here, in a state where the lip L is near the center on the lead 11 (see FIGS. 11 and 12), the output value excluding noise is observed over a certain number of continuous positions (for example, positions P4 to P8). In addition, the graph showing the output value often has a chevron shape with symmetry.

Further, the constant number of continuous positions where the output value excluding noise is observed may vary depending on the total number of detection units of the lead 11 and the shape of each detection unit. For example, as shown in FIG. 6, the lead 11 When has 9 detectors, the above-mentioned fixed number is often 5 or 6.

On the other hand, if the position of the lip L is too close to the heel side (see FIGS. 7 to 10), the graph showing the output value of the lip sensor becomes asymmetric.
This phenomenon occurs because the output value that would have been output if the lead 11 had a further detection unit at the heel side position was lacking.
The same applies when the position of the lip L is too close to the tip side.

That is, if there are further detection units on the heel side and tip side, the detection that outputs the output value to the extent that it is expected that the number of detection units that output the output value due to the contact of the lip L is larger. When the number of parts is small and the detection part where the output value due to the contact of the lip L is expected to be output is offset to the heel side or the tip side and has an asymmetrical chevron shape when viewed as a whole. It can be said that noise has a considerable effect on the calculation of the position of the center of gravity.

In particular, when the output value excluding noise is output only from the detection unit located on the tip side or the heel side (for example, the detection unit 31 or 39 corresponding to the position P1 or P9), the influence of noise is affected. It tends to grow.

(Procedure for calculating the position of the center of gravity)
Based on the relationship between the sensor output mode and the center of gravity position described above, in the first embodiment, the CPU 5 determines the center of gravity position based on the output value equal to or higher than the threshold value under certain conditions.

Hereinafter, processing related to determination of the position of the center of gravity will be described with reference to the flowchart shown in FIG.
When the power of the electronic musical instrument 100 is turned on, the CPU 5 performs a process of updating the output values of the detection units 31 to 39 included in the lip detection unit 3 in ST11.

Next, in step ST12, the CPU 5 determines whether or not the output value of the detection unit 31 or the detection unit 39 located on the tip side or the heel side is equal to or higher than a preset threshold value.
This process corresponds to the third process of the present invention, and is a process that serves as an index for determining the possibility that the lip L is located at a position offset to the tip side or the heel side.

Here, the threshold value may be set by a specific numerical value such as "100", or a fixed ratio (for example, 10% or 20%) of the maximum output value output from one detection unit. May be set.
Further, the threshold value may be set separately for each of the detection unit 31 on the most tip side and the detection unit 39 on the heel side.
However, it is desirable that the threshold value is set so that the output value evaluated as noise can be substantially removed and the output value evaluated as valid is not removed.

In the process related to step ST12, when it is determined that the output value of the detection unit 31 or the detection unit 39 located on the tip side or the heel side is equal to or greater than the threshold value, the process in the CPU 5 proceeds to step ST13.
On the other hand, if it is determined that the output value of the detection unit 31 or the detection unit 39 is less than the threshold value, it is considered that the position of the lip L is not significantly offset to the tip side or the heel side, so that normal processing is performed. Therefore, the process in the CPU 5 proceeds to step ST15.

Next, when the process proceeds to step ST13, in step ST13, the CPU 5 has several consecutive detection units that output an output value equal to or higher than the threshold value from the detection unit 31 or the detection unit 39 located on the tip side or the heel side. It is determined whether or not the obtained number of detection units is less than the set value number.

This treatment corresponds to the first treatment and the fourth treatment of the present invention, and as described above, in a state where the position of the lip L may be biased to the tip side or the heel side, according to the contact of the lip L. By checking the number of detectors that output the expected output value, the lip L is offset to the tip side or heel side so that the influence of noise becomes a problem, that is, it reacts by the contact of the lip L. This is a process for determining whether or not the number of detection units is too small.

Here, the set value is a preset value, and is the number of detection units equal to or greater than the threshold value continuous in the longitudinal direction of the reed 11 which is observed when the lip L is located near the center on the reed 11. In the example of FIG. 12, it is set to "5") or less.
That is, when the lip L is less than or equal to the number of detectors whose output value is observed when the lip L does not extend beyond the area where the detector exists, the number of detectors outputting the output value is smaller than usual. Therefore, by setting the normal number to the set value, if it is less than the set value, the lip L is too biased to the tip side or the heel side, and the output value can be obtained. It can be judged that the number is too small.

If it is important to minimize the influence of noise, the set value should be equal to the number of detectors that output the output value when the lip L is not offset to the tip side or heel side. preferable.

On the other hand, when it is sufficient to avoid a large movement of the center of gravity position, for example, when there is no problem if the center of gravity position is deviated to the extent explained with reference to FIG. 10 when affected by noise. Normally, the number of detectors that output the output value by the contact of the lip L is 5 (state in FIG. 12), whereas the number 3 which is smaller than that is set as the set value. , The set value may be set smaller than the normal number so as to allow the case where the number of detection units that output the output value by the contact of the lip L shown in FIG. 10 is 4.

If it is determined in step ST13 that the number of continuous detection units described above is less than the set value, the process in the CPU 5 proceeds to step ST14.
When it is determined that the number of continuous detection units described above is equal to or greater than the set value, the process in the CPU 5 proceeds to step ST15.

In step ST14, the CPU 5 determines the position of the center of gravity based on the output value of the detection unit determined to output the output value equal to or higher than the threshold value.
In this case, the CPU 5 treats the output value of the detection unit having an output value less than the threshold value as zero.
This process corresponds to the second process of the present invention.

Proceeding to step ST14 means that the position of the lip L is too biased toward the tip side or the heel side, and as a result, the number of detectors from which the output value due to the contact of the lip L is obtained is small, and it is easily affected by noise. Therefore, in step ST14, the process of obtaining the position of the center of gravity of the lip L is performed only by the detection unit that outputs the output value equal to or higher than the threshold value, and the influence of noise is avoided.

After that, in step ST15, the CPU 5 reflects the determined position of the center of gravity in the sound.

On the other hand, when the process immediately proceeds from step ST12 and ST13 to step ST15, the process of obtaining the position of the center of gravity is performed using the output values of all the detection units before executing the process of step ST15.

Even when proceeding from steps ST12 and ST13 to step ST15 immediately, it seems better to identify the detection unit that outputs the output value that seems to be noise by the threshold value and not to use the output value of the detection unit for calculation. However, if the output value is such that it is the boundary between the output due to noise and the output due to the contact of the lip L, what should be treated as noise should be due to the contact of the lip L. It may be an output, or conversely, it may be treated as an output due to noise even though it is an output due to the contact of the lip L.

More specifically, if the threshold value is small, the probability that it is not judged as noise even though it is noise is high, and conversely, if the threshold value is large, the probability that it is judged as noise even though it is not noise is high. It gets higher.

On the other hand, when the process immediately proceeds from step ST12 and ST13 to step ST15, it can be said that the lip L is in contact with many detection units, and the calculation of the center of gravity position is performed with reference to FIG. Since it is in a state where it is not easily affected by noise, it is often better to execute a normal calculation than to judge by a threshold value. Therefore, in the present embodiment, when the process immediately proceeds from steps ST12 and ST13 to step ST15. Is set to perform a process of obtaining the position of the center of gravity using the output values of all the detection units before executing the process of step ST15.

However, if it is possible to give an appropriate threshold value that can reliably determine whether or not noise is present, the same processing as in step ST14 should be performed even when the process immediately proceeds from steps ST12 and ST13 to step ST15. You may.
That is, the position of the center of gravity of the lip L may always be calculated by limiting the output value to the detection unit that outputs the threshold value or more.

Then, the CPU 5 repeatedly executes the above-mentioned steps ST11 to ST15.

As described above, in the first embodiment, the output value evaluated as not noise appears biased toward the tip side or the heel side, and the detection unit outputs the output value evaluated as not noise. Even in a situation where a large error is likely to occur in the calculation result of the center of gravity position due to the influence of noise that the number of is less than the set value, it is possible to determine a probable center of gravity position that is not affected by noise.
Therefore, the dissociation between the physical position of the lip L on the lead 11 and the obtained center of gravity position of the lip L can be reduced, and a musical tone closer to the intention of the performer P can be generated.

[Second Embodiment]
An electronic musical instrument according to a second embodiment of the present invention will be described with reference to FIGS. 14 to 17.
The physical and functional contents of the electronic musical instrument according to the second embodiment are the same as those of the electronic musical instrument 100 according to the first embodiment.
However, the content of the process executed by the CPU 5 as the control means, particularly the method of calculating the position of the center of gravity is different from that of the first embodiment.
Therefore, the method of calculating the position of the center of gravity will be mainly described below.

(Virtual detector and virtual output value)
FIG. 14 is a diagram showing an example of a virtual detection unit. Further, FIG. 15 is a table showing an example of the output value and the position of the center of gravity when the virtual detection unit is not added and when it is added, FIG. 16 is a graph corresponding to FIG. 15, and the horizontal axis is the lead. The positions on 11 are indicated by P1 to P9 corresponding to the detection units 31 to 39, and the vertical axis indicates the output value of the sensor, respectively.
In the following, the notation P1 to P13 will be used as the reference numerals for the detection unit so that the relationship between the graph and the detection unit can be easily understood.

Although the physical number of detection units 31 to 39 on the lead 11 does not change, the CPU 5 has the most heel side detection unit 39 (hereinafter, as shown by the broken line in FIG. 14) under certain conditions. , A virtual detection unit (virtual detection units P10 to P13 in this example) having a virtual virtual output value is generated on the heel side of the detection unit on the most heel side.
The process of generating this virtual detection unit corresponds to the fifth process of the present invention.

In the following description, the heel side will be described, but as described in the first embodiment, the same situation also occurs on the tip side. Therefore, the CPU 5 physically determines the tip side detection unit 31 according to the conditions. (Hereinafter, it may be simply referred to as the detection unit on the tip side), and a virtual detection unit is generated on the tip side.

Then, the CPU 5 assigns a virtual output value (hereinafter, also referred to as a virtual output value) as described later to such a virtual detection unit, and includes the virtual detection unit having this virtual output value as described above. Calculate the position.

The conditions for generating such a virtual detection unit and a virtual output value are that the detection unit on the most tip side or the most heel side outputs an output value equal to or higher than the threshold value, and the most tip side or the most heel side. The number of consecutive detection units that output an output value equal to or greater than the threshold value from the side detection unit is less than the set value.

This condition is a condition in which the position of the lip L is already offset to the tip side or the heel side as described in the first embodiment, and the number of detection portions in contact with the lip L is small. , The set value and the threshold value are set in the same manner as described in the first embodiment.

Then, as described below, how many virtual detection units are generated is determined based on the set value, and the virtual output value assigned to the virtual detection unit is the position where the lip L is offset to the tip side or the heel side. It is determined so that the output value of the chevron with symmetry, which is the normal state seen when not in, can be reproduced.

Specifically, it will be described with reference to the figure. For example, in FIG. 16A, the output values corresponding to the positions P7 to P9 are {128,255,255}, and the output values of the other positions P1 to P6 are {0}.

On the other hand, in the case where the heel side is not biased in this way, if the threshold value is, for example, "100" as shown in FIG. 12, the number of detection units equal to or greater than the threshold value is 5, and the first embodiment As described in FIG. 16A, since the number of detection units equal to or greater than the threshold value in this normal state is set as the set value, in the case shown in FIG. 16A, the state is two short of the set value. You can see that it is in.

The number of shortages can be obtained as three by counting the number of detection units that output an output value equal to or higher than the threshold value from the detection unit P9 on the heel side to the tip side, including the detection unit P9. It can be obtained by taking the difference from the number 5.

Here, when it is considered that the insufficient number of detection units is caused by the lip L being located too close to the heel side, and therefore there are two detection units further on the heel side than the detection unit P9. The mountain shape of the output value, which is the sum of the output values of the two detection units, has a mountain shape of the output value as shown in FIG. 12A, that is, symmetry, which is seen at the time of a normal output value. It is thought that the output value will be Yamagata.

From this, when it is considered that there are two detection units on the heel side of the detection unit P9, the virtual virtual output values of the added virtual detection units P10 and P11 are viewed as a whole. , It is considered natural to have a chevron shape having symmetry as shown in FIG. 16 (b).

Therefore, the detection units P7, P8, and P9 (hereinafter referred to as actual effective detection units) that output an output value equal to or higher than the threshold value are included with respect to the virtual detection units P10 and P11 so as to form a chevron with symmetry. In order to form a chevron with symmetry, the actual effective detection unit (P7, P8, P9 of the detection unit) and the virtual detection units P10, P11 are collectively treated as the effective detection unit, and this effective detection unit (P7 of the detection unit) is handled. , P8, P9 and virtual detection units P10, P11) Set virtual output values in virtual detection units P10, P11 so that the mountain shape of the output value is symmetrical with respect to the central detection unit (detection unit P8). (See FIG. 16 (b)).

That is, in the example of FIG. 16, the virtual output values of {255,128} are assigned to the two virtual detection units P11 and P12, respectively, as shown in FIG. 16B.
Although this explanation is given on the heel side, the same applies to the tip side.

Then, assuming that the numbers "10" and "11" are assigned to the virtual positions P10 and P11, the position of the center of gravity calculated based on the output values of the actual effective detection unit and the virtual detection unit (effective detection unit) is as follows. As shown in the formula, it becomes 9.0.

これに対して、仮想検出部の仮想出力値を考慮することなく算出された重心位置は、図１５、図１６（ａ）に示すように８．２である。
したがって、仮想検出部の仮想出力値にも基づいて重心位置を計算することで、算出結果が理想的な重心位置に近づくことが期待される。

On the other hand, the position of the center of gravity calculated without considering the virtual output value of the virtual detection unit is 8.2 as shown in FIGS. 15 and 16A.
Therefore, by calculating the center of gravity position based on the virtual output value of the virtual detection unit, it is expected that the calculation result approaches the ideal center of gravity position.

By the way, the position of the center of gravity determined by using the virtual output value may be calculated further to the heel side than the actual possible position of the center of gravity on the heel side, but such a position of the center of gravity is not realistic. In this case, the CPU 5 performs a process of determining the position of the center of gravity at the most possible heel-side position (for example, the position P9 in FIG. 14).

Even on the tip side, the same thing, that is, the position of the center of gravity determined by using the virtual output value may be calculated on the tip side more than the position of the center of gravity on the most possible tip side. In this case as well, the CPU 5 performs a process of determining the position of the center of gravity at the most possible tip-side position (for example, the position P1 in FIG. 14).

When it is calculated that the position of the center of gravity is outside the position where such a physical detection unit exists, the process of setting the position of the detection unit located on the outermost side as the center of gravity is the sixth process of the present invention. Corresponds to.

(Procedure for calculating the position of the center of gravity)
The process of determining the position of the center of gravity in the second embodiment will be described with reference to the flowchart shown in FIG.

The procedure for determining the position of the center of gravity in the second embodiment is basically the same as the procedure for determining the position of the center of gravity in the first embodiment.
A different procedure is to use the virtual output value of the virtual detection unit (that is, the output value of the effective detection unit) in addition to the output value of the actual effective detection unit when the position of the center of gravity is determined in step ST24. ..

However, if the position of the center of gravity calculated based on the virtual output value is out of the range of realistically possible positions (P1 to P9 in FIG. 14), a process corresponding to the above-mentioned sixth process is performed and the center of gravity is performed. The position will be determined to be the most tip-side or heel-side position that can be realistically taken.
This makes it possible to calculate a more plausible center of gravity position.

Actually, the position of the center of gravity is calculated in the form of having a numerical value after the decimal point, that is, it does not match the number of one of the detection units, and the calculation is that the lip L is between the two detection units. Since the situation where the center of gravity position exists is also calculated, it is better to calculate by assuming the virtual detection unit as described above to obtain the center of gravity position with higher accuracy than in the first embodiment. be able to.

When proceeding to step ST25 immediately from steps ST22 and ST23, as in the first embodiment, before executing the process of step ST25, a process of obtaining the position of the center of gravity using the output values of all the detection units is performed. Is going.

As described above, in the second embodiment, since the output value of the effective detection unit is used when determining the position of the center of gravity, a more plausible position of the center of gravity can be obtained. As a result, even when the performer P holds the tip side or the heel side, it is possible to generate a musical tone closer to the intention of the performer P.

Although the lead for an electronic musical instrument and the electronic musical instrument of the present invention have been described above based on the specific embodiments, the present invention is not limited to the above-mentioned specific embodiments, and the technical aspects of the present invention are not limited to the above. The scope includes various modifications and improvements within the scope of achieving the object of the present invention, which is clear to those skilled in the art from the description of the scope of claims.

The inventions described in the claims originally attached to the application of this application are added below. The claims in the appendix are as specified in the claims originally attached to the application for this application.
<Claim 1>
A lead provided with a plurality of detectors for detecting the contact state of the lip from the tip to the base,
A control unit that determines the position of the center of gravity of the lip on the lead based on the output value of the detection unit is provided.
The control unit
The first process of determining the detection unit that outputs the output value equal to or higher than the threshold value, and
The process including the second process of determining the position of the center of gravity based on the output value of the detection unit determined to output the output value equal to or higher than the threshold value by the first process is executed. A characteristic electronic musical instrument.
<Claim 2>
The control unit has a third process of determining whether the detection unit located closest to the tip end side or the base end portion side outputs the output value equal to or higher than the threshold value.
When it is determined by the third process that the detection unit located on the most tip side or the base end side outputs the output value equal to or higher than the threshold value, the most tip side or the base end side thereof. The fourth process of determining how many consecutive detection units are outputting the output value equal to or higher than the threshold value from the detection unit located at
When the number of the detection units obtained by the fourth process is less than the preset number, the fifth process of setting the virtual detection unit having the virtual output value is executed.
The electronic musical instrument according to claim 1, wherein the second process is executed by using the virtual output value as well.
<Claim 3>
In the fifth process, it is determined that the detection unit located on the proximal end side in the third process outputs the output value equal to or higher than the threshold value, and the detection unit obtained by the fourth process When the number is less than a preset number, it is assumed that the insufficient number of the virtual detection units exists from the detection unit located closest to the base end side to the base end side. The detection unit that continuously outputs the output value equal to or higher than the threshold value from the detection unit located on the most proximal end side is defined as an actual effective detection unit, and includes the actual effective detection unit and the virtual detection unit. Using the output value of the actual effective detection unit as the effective detection unit, the virtual detection unit so that the output value becomes symmetrical with respect to the detection unit located at the center of the effective detection unit. The electronic musical instrument according to claim 2, wherein the process is for setting the virtual output value.
<Claim 4>
In the control unit, the position of the center of gravity determined by executing the second process so as to use the virtual output value is further higher than the position of the center of gravity on the most possible base end side. The electronic musical instrument according to claim 3, wherein when the side is on the side, the sixth process is performed so that the position of the center of gravity is actually the position of the center of gravity on the most proximal end side.
<Claim 5>
In the fifth process, it is determined that the detection unit located on the tip end side in the third process outputs the output value equal to or higher than the threshold value, and the number of the detection units obtained by the fourth process is obtained. When is less than a preset number, it is assumed that the insufficient number of the virtual detection units is present from the detection unit located closest to the tip side to the tip side, and the most tip portion. The detection unit that continuously outputs the output value equal to or higher than the threshold value from the detection unit located on the side is used as the actual effective detection unit, and the detection unit including the actual effective detection unit and the virtual detection unit is used. As the effective detection unit, the output value of the actual effective detection unit is used, and the virtual output is output to the virtual detection unit so that the output value becomes symmetrical with respect to the detection unit located at the center of the effective detection unit. The electronic musical instrument according to claim 2, wherein the process is for setting a value.
<Claim 6>
In the control unit, the position of the center of gravity determined by executing the second process so as to use the virtual output value is further on the tip side than the position of the center of gravity on the most tip side that is actually possible. The electronic musical instrument according to claim 5, wherein in some cases, the sixth process is performed in which the position of the center of gravity is set to the position of the center of gravity on the most tip side that can actually be located.
<Claim 7>
It is a control method of an electronic musical instrument including a lead provided with a plurality of detection parts for detecting a contact state of a lip from a tip portion to a base end portion.
The first step of obtaining the detection unit that outputs an output value equal to or higher than the threshold value, and
A method for controlling an electronic musical instrument, which comprises a second step of determining the position of the center of gravity of the lip on the lead by using the output value corresponding to the detection unit obtained in the first step. ..
<Claim 8>
A control unit of an electronic musical instrument having a lead provided with a plurality of detection units for detecting a contact state of a lip from a tip portion to a base end portion.
The first process for obtaining the detection unit that outputs an output value equal to or higher than the threshold value, and
An electron characterized in that a process including a second process of determining the position of the center of gravity of the lip on the lead is executed by using the output value corresponding to the detection unit obtained by the first process. Program for musical instruments.

100 Electronic musical instrument 3 Lip detection unit 5 CPU (control unit)
10 Mouthpiece 11 Lead for electronic musical instruments
31-39 Detection unit S11-S19 Touch sensor

Claims (8)

A lead provided with a plurality of detectors for detecting the contact state of the lip from the tip to the base,
A control unit that determines the position of the center of gravity of the lip on the lead based on the output value of the detection unit is provided.
The control unit
The first process of determining the detection unit that outputs the output value equal to or higher than the threshold value, and
A process including a second process of determining the position of the center of gravity based on the output value of the detection determined to be outputting the output value equal to or higher than the threshold value by the first process is executed. A characteristic electronic musical instrument. The control unit has a third process of determining whether the detection unit located closest to the tip end side or the base end portion side outputs the output value equal to or higher than the threshold value.
When it is determined by the third process that the detection unit located on the most tip side or the base end side outputs the output value equal to or higher than the threshold value, the most tip side or the base end side thereof. The fourth process of determining how many consecutive detection units are outputting the output value equal to or higher than the threshold value from the detection unit located at
When the number of the detection units obtained by the fourth process is less than the preset number, the fifth process of setting the virtual detection unit having the virtual output value is executed.
The electronic musical instrument according to claim 1, wherein the second process is executed by using the virtual output value as well. In the fifth process, it is determined that the detection unit located on the proximal end side in the third process outputs the output value equal to or higher than the threshold value, and the detection unit obtained by the fourth process When the number is less than a preset number, it is assumed that the insufficient number of the virtual detection units exists from the detection unit located closest to the base end side to the base end side. The detection unit that continuously outputs the output value equal to or higher than the threshold value from the detection unit located on the most proximal end side is defined as an actual effective detection unit, and includes the actual effective detection unit and the virtual detection unit. Using the output value of the actual effective detection unit as the effective detection unit, the virtual detection unit so that the output value becomes symmetrical with respect to the detection unit located at the center of the effective detection unit. The electronic musical instrument according to claim 2, wherein the process is for setting the virtual output value. In the control unit, the position of the center of gravity determined by executing the second process so as to use the virtual output value is further higher than the position of the center of gravity on the most possible base end side. The electronic musical instrument according to claim 3, wherein when the side is on the side, the sixth process is performed so that the position of the center of gravity is actually the position of the center of gravity on the most proximal end side. In the fifth process, it is determined that the detection unit located on the tip end side in the third process outputs the output value equal to or higher than the threshold value, and the number of the detection units obtained by the fourth process is obtained. When is less than a preset number, it is assumed that the insufficient number of the virtual detection units is present from the detection unit located closest to the tip side to the tip side, and the most tip portion. The detection unit that continuously outputs the output value equal to or higher than the threshold value from the detection unit located on the side is used as the actual effective detection unit, and the detection unit including the actual effective detection unit and the virtual detection unit is used. As the effective detection unit, the output value of the actual effective detection unit is used, and the virtual output is output to the virtual detection unit so that the output value becomes symmetrical with respect to the detection unit located at the center of the effective detection unit. The electronic musical instrument according to claim 2, wherein the process is for setting a value. In the control unit, the position of the center of gravity determined by executing the second process so as to use the virtual output value is further on the tip side than the position of the center of gravity on the most tip side that is actually possible. The electronic musical instrument according to claim 5, wherein in some cases, the sixth process is performed in which the position of the center of gravity is set to the position of the center of gravity on the most tip side that can actually be located. It is a control method of an electronic musical instrument including a lead provided with a plurality of detection parts for detecting a contact state of a lip from a tip portion to a base end portion.
The first step of obtaining the detection unit that outputs an output value equal to or higher than the threshold value, and
A method for controlling an electronic musical instrument, which comprises a second step of determining the position of the center of gravity of the lip on the lead by using the output value corresponding to the detection unit obtained in the first step. .. A control unit of an electronic musical instrument having a lead provided with a plurality of detection units for detecting a contact state of a lip from a tip portion to a base end portion.
The first process for obtaining the detection unit that outputs an output value equal to or higher than the threshold value, and
An electron characterized by executing a process including a second process of determining the position of the center of gravity of the lip on the lead using the output value corresponding to the detection unit obtained by the first process. Program for musical instruments.

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