JP2018045108A - Electronic musical instrument, method of controlling the same, and program for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument capable of correctly detecting a lip position even in the presence of output value variation caused by humidity and temperature variations.SOLUTION: An electronic musical instrument of the present invention includes a control unit having a plurality of detection units arranged from a tip end portion to a base end portion, the control unit being configured to perform processes including; a process for acquiring an output value of each detection unit; a process for deriving an initial first centroid position of a lip on a reed from initial output values and identifiers of the detection units; a process for deriving an initial second centroid position of the lip on the reed from initial output values and identifiers other than those of at least one detection unit on the tip end side; a process for deriving a current second centroid position of the lip on the reed from current output values and identifiers of the detection units, and determining if the initial and current second centroid positions are the same or not; and a process for sounding a musical tone generated based on the initial first centroid position if the initial and current second centroid positions are determined to be the same.SELECTED DRAWING: Figure 11

Description

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

  Conventionally, in acoustic wind instruments (woodwind instruments using reeds: saxophone, clarinet, etc.), changes in the position and pressure of the lips and tongue that touch the reed change the tone of the musical tone, realizing a variety of performance expressions.

On the other hand, Patent Literature 1 discloses an electronic wind instrument that electronically synthesizes and outputs musical sounds.
In this electronic wind instrument, a plurality of pressure-sensitive lip sensors (pressure-sensitive sensors) are arranged on the lead, and the tone is controlled by detecting the positions of the lips and the tongue.

JP 7-72853 A

By the way, for example, when performing with the mouthpiece held in a manner like an acoustic performance, the same position of the lead can be held for a long time.
At this time, the tip located on the mouth side of the lead will be located in the player's mouth for a long time, but the output value fluctuates due to the influence of moisture and temperature, such as a capacitive sensor, for example When this sensor is used for detecting the position of the lip, there is a problem that the position detection of the lip also varies due to the variation of the output value.

  The present invention has been made in view of such circumstances, and an electronic musical instrument that can correctly detect the position of a lip even when a sensor of a type whose output value fluctuates due to the influence of humidity or temperature is used as a lead, and its electronic An object is to provide a method for controlling a musical instrument and a program for the electronic musical instrument.

In order to achieve the above object, the present invention is grasped by the following configuration.
The electronic musical instrument of the present invention includes a lead having a plurality of detection units arranged from the front end portion toward the base end portion, a control unit that performs control according to an identifier of each detection unit and an output value from each detection unit, The control unit is configured to acquire a lip on the lead based on a process of acquiring an output value from each of the detection units, and an initial output value and an identifier of each of the detection units acquired from each of the detection units. And the initial output of at least one of the detection units on the distal end side of the initial output value and identifier used to determine the initial first centroid position. Based on the initial output value and the identifier excluding the value and the identifier, the process for obtaining the initial second center of gravity position of the lip on the lead and the output value for obtaining the initial second center of gravity position are acquired. Based on the current output value and the identifier obtained from each of the detection units, the current second centroid position of the lip on the lead is obtained, and the initial second centroid position and the current second centroid position are the same. If the initial second centroid position and the current second centroid position are determined to be the same by the determination process and the determination process, based on the initial first centroid position And a process including generating a generated musical sound.

  The control method of the present invention includes a lead having a plurality of detection units arranged from the distal end portion toward the proximal end portion, a control unit that performs control according to an identifier of each detection unit and an output value from each detection unit, The method of controlling an electronic musical instrument comprising: a process for acquiring an output value from each of the detection units, and an initial output value and an identifier of each of the detection units acquired from each of the detection units. The process of obtaining the initial first center of gravity position of the lip on the upper side, and the initial output value and the identifier used for obtaining the initial first center of gravity position of at least one of the detection units on the tip side Based on the initial output value and identifier excluding the initial output value and identifier, a process for obtaining an initial second center of gravity position of the lip on the lead, and the output for obtaining the initial second center of gravity position The current second centroid position of the lip on the lead is obtained based on the current output value and identifier acquired from each of the detection units that have acquired the initial second centroid position and the current second centroid. The initial first centroid when the initial second centroid position and the current second centroid position are determined to be the same by the process of determining whether the position is the same and the determination process And a process of generating a tone generated based on the position.

  The program of the present invention includes a lead having a plurality of detection units arranged from the distal end portion toward the proximal end portion, a control unit that performs control according to an identifier of each of the detection units and an output value from each of the detection units, A process for obtaining an output value from each of the detection units, and an initial output value and an identifier of each of the detection units obtained from each of the detection units. Based on the first centroid position of the lip on the lead, and at least one of the initial output value and identifier used for obtaining the initial first centroid position on the tip side. A process of obtaining an initial second center of gravity position of the lip on the lead based on the initial output value and identifier excluding the initial output value and identifier of the two detection units; and Based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the center of gravity position, the current second center of gravity position of the lip on the lead is obtained, and the initial second center of gravity position is obtained. And the process of determining whether the current second centroid position is the same as the process of determining whether the current second centroid position and the current second centroid position are the same. And a process of generating a tone generated based on the initial first center-of-gravity position.

  According to the present invention, an electronic musical instrument that can correctly detect the position of the lip even if a sensor of a type whose output value fluctuates due to the influence of moisture or temperature is used for the lead, a method for controlling the electronic musical instrument, and the electronic musical instrument A program can be provided.

(A) is a top view of the electronic musical instrument which concerns on embodiment of this invention, (b) is a side view of an electronic musical instrument. It is a block diagram which shows the function structure of an electronic musical instrument. (A) is sectional drawing which shows a mouthpiece, (b) is a bottom view which shows a mouthpiece. It is a figure which shows the contact state of a player's oral cavity and a mouthpiece. (A) is a bottom view of the lead contacted in the lip contact range C1 and a diagram showing the output value of the sensor, (b) is a bottom view of the lead contacted in the lip contact range C2 and a diagram showing the output value of the sensor, (c) ) Is a bottom view of the leads that are in contact with each other in the lip contact range C2 and the tongue contact range C3, and a diagram showing an output value of the sensor. It is a figure which shows typically the detection part contained in a lead | read | reed. It is a figure which shows an example of the relationship between the position on a lead | read | reed, the output value of a lip sensor, and the 1st and 2nd gravity center position immediately after a player holds a mouthpiece. It is a figure which shows an example of the relationship between the position on a lead | read | reed, the output value of a lip sensor, and the 1st and 2nd gravity center position when the player P plays with holding the state which held the mouthpiece. In FIG. 8, it is a figure which shows an example of the state by which the 1st gravity center position was correct | amended. It is a flowchart which shows a main routine. It is a flowchart which shows the flow of a process of a lip | rip detection part.

Embodiments according to the present invention will be described below with reference to the accompanying drawings.
The electronic musical instrument according to the present embodiment is an electronic musical instrument that represents a performance in accordance with a performance method (for example, pitch bend or vibrato) of an acoustic wind instrument that is a woodwind instrument using a lead.

Hereinafter, an example in which the electronic musical instrument is a saxophone will be described. However, the present invention is not limited to this, and may be applied to other electronic musical instruments using a lead, such as a clarinet.
In the following, it is assumed that the player continues to hold the same position on the lead for a relatively long time, for example, the player P is performing with an acoustic performance.

(Electronic musical instrument)
The basic contents of the electronic musical instrument 100 will be described with reference to FIG.
FIG. 1A is a plan view of an electronic musical instrument 100 according to an embodiment of the present invention, and FIG. 1B is a side view of the electronic musical instrument 100.

As shown in FIGS. 1A and 1B, the electronic musical instrument 100 includes a tubular body portion 100 a and includes an operator 1 on the tubular body portion 100 a, a sound system 9, 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 part 100a is a housing part of a main body having a shape simulating a tube part of a saxophone.
The operation unit 1 is an operation unit operated by a player P (user) with a finger, a performance key for determining a pitch, a function for changing a pitch according to a music key, a function for performing fine adjustment of a pitch, and the like. Contains setting keys to set.

The mouthpiece 10 is a component operated by the player P with his / her mouth, and will be described in detail later.
The sound system 9 is a component that has a speaker and the like and outputs a musical sound.

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

The breath pressure detector 2 is a sensor that detects the pressure (breath pressure) of the breath blown into the mouthpiece 10 from the player P.
The sound source 8 is a circuit that generates musical sounds.
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 detector 2, a lip detector 3, a tongue detector 4, a CPU 5, a ROM 6, a RAM 7, a sound source 8, and a sound. And a system 9.
The lip detector 3 and the tongue detector 4 are included in a lead 11 provided on the mouthpiece 10 (see FIG. 3).
In addition, each part of the electronic musical instrument 100 except the sound system 9 is connected to each other via a bus 9a.

The operation element 1 has various keys such as a performance key and a setting key as described above, receives various key operations from the player P, and outputs the operation information to the CPU 5.
The setting key sets a tone setting function, a function for changing the pitch according to the music key, and a function for finely adjusting the pitch, and the contact position of the lip L detected by the lip detection unit 3 and the lip L This is a key for setting a function for pre-selecting the mode to be finely adjusted according to the contact area from the tone color, volume and height of the musical tone.

  The breath pressure detection unit 2 detects the breath pressure of the breath blown into the mouthpiece 10 from the player P as described above, and outputs the breath pressure information to the CPU 5.

The lip detection unit 3 is a capacitive touch sensor that detects the contact of the player P with the lip L, and the capacitance according 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 lip L detection information.
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 capacitive touch sensor that detects the contact of the player P with the tongue (tongue), and the CPU 5 uses the capacitance according to the contact area of the tongue in the touch sensor as the detection information of the tongue. Output.

The CPU 5 functions as a control unit that controls each unit of the electronic musical instrument 100.
The CPU 5 reads the designated program from the ROM 6 and develops it in the RAM 7 and executes various processes in cooperation with the developed program.

  More specifically, the CPU 5 includes the operation information input from the operation element 1, the breath pressure information input from the breath pressure detector 2, and the contact detection information of the lip L input from the lip detector 3. The sound source 8 is instructed to generate a musical tone based on the contact detection information of the tongue input from the tongue detector 4.

  For example, the CPU 5 sets the pitch of the musical sound based on the pitch information as the operation information input from the operation element 1, and the volume of the musical sound based on the breath pressure information input from the breath pressure detection unit 2. And finely adjust at least one of the tone color, volume and height of the musical tone according to the capacitance according to the lip contact position and the lip contact area based on the detection information of the lip L input from the lip detector 3 Based on the contact detection information of the tongue (tongue) input from the tongue detector 4, the note on / off of the musical tone is set.

The ROM 6 is a read-only semiconductor memory and 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 the CPU 5 generates a musical tone generation instruction (musical tone) based on the operation information on the operation element 1, the lip L detection information from the lip detection unit 3, and the tan detection information from the tan detection unit 4. In accordance with (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 for filtering a 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 performs signal amplification or the like on the musical sound signal input from the sound source 8 and outputs it as a musical sound from a built-in speaker.

(Mouthpiece and lead)
With reference to FIG.3 and FIG.4, the basic content of the mouthpiece 10 is demonstrated.
FIG. 3A is a cross-sectional view showing the mouthpiece 10, and FIG. 3B is a bottom view showing the mouthpiece 10.
In the following, as shown in FIG. 3A, along the longitudinal direction of the mouthpiece 10, the mouth side of the player P is referred to as “tip” (tip portion), and the tubular body portion 100 a side is referred to as “heel” ( It will be referred to as a “base end portion”.

  As shown in FIGS. 3A and 3B, the mouthpiece 10 includes a mouthpiece body 10 a, a lead 11 for an electronic musical instrument, and a fixture 12.

  The mouthpiece main body 10a is a main body part of the mouthpiece 10 having an opening 13 through which the player P breathes, and is connected to the tubular body 100a.

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

As shown in FIG. 3B, the lead 11 includes a substrate and a plurality of detection units 20 and 30 to 40 provided on the substrate.
And the some detection parts 20 and 30-40 are arrange | positioned in the state which aligned in the board | substrate toward the heel side from the tip side.
The detection unit 20 is an electrode unit of the capacitive touch sensor S <b> 10 included in the tongue detection unit 4.

The detection units 30 to 40 are electrode units of the capacitive touch sensors S20 to S30 that the lip detection unit 3 has.
The detection units 30 to 40 are arranged at substantially equal intervals from the tip side to the heel side of the lead 11 and have substantially the same width.
In FIG.3 (b), although the detection parts 30-40 are rectangular shape, it is not restricted to this, For example, V shape and a waveform may be sufficient.
In addition, the size and number of detection units may be appropriately increased or decreased.

FIG. 4 is a view showing a contact state between the mouth of the player P and the mouthpiece 10.
As shown in FIG. 4, when the electronic musical instrument 100 is played, the performer P touches the lead 11 by placing the upper front tooth E <b> 1 on the upper part of the mouthpiece body 10 a, wrapping the lower front tooth E <b> 2 with the lower lip L. .
In this way, the mouthpiece 10 is held by the upper front teeth E1 and the lip L.

The tongue inside the oral cavity at the time of performance is either a tongue T1 (solid line) in a state of touching the lead 11 or a tongue T2 (dashed line) in a state of not touching the lead 11 depending on the playing style.
And touch sensor S10, S20-S30 detects the contact state (tan T1: contact or tongue T2: non-contact) of the lip L and the tongue with respect to the detection parts 20, 30-40, and detection information is sent with respect to CPU5. Output.

As will be described in detail later, the CPU 5 calculates the contact position of the lip L on the lead 11 according to the detection information output from the touch sensors S20 to S30.
Similarly, 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 detector 3 and the tongue detector 4 will be described with reference to FIG.
FIG. 5A shows a bottom view of the lead 11 in contact with the lip contact range C1 and a sensor output value, and FIG. 5B shows a bottom view of the lead 11 in contact with the lip contact range C2 and a sensor output value. FIG. 4C is a bottom view of the lead 11 in contact with the lip contact range C2 and the tongue contact range C3 and a diagram showing the output value of the sensor.

5 (a) to 5 (c), the horizontal axis indicates the position on the lead 11, and the vertical axis indicates the output intensity (output voltage) of the touch sensor S corresponding to each position in the form of a bar graph. It represents.
However, in FIG. 5, for convenience, the detection units 36 to 40 and the output intensity corresponding to these detection units 36 to 40 are omitted.

  As shown in FIG. 5A, when the player P makes contact with the lip L so that the lip L is most strongly applied to the lip contact range C1, the output intensity of the touch sensor S21 in the detection unit 31 corresponding to the lip contact range C1 is maximum. A distribution is obtained.

Further, as shown in FIG. 5B, when the player P makes contact with the lip L so that the lip L is most strongly applied to the lip contact range C2, the touch sensors S22 in the detection units 32 and 33 corresponding to the lip contact range C2, A distribution that maximizes the output intensity in S23 is obtained.
However, in FIG. 5A and FIG. 5B, the output intensity of the touch sensor S10 in the detection unit 20 is not obtained.

As described above, in the capacitive 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 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.

  As shown in FIG. 5C, when the player 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 32, which overlaps with the lip contact range C2, A large output value is obtained for the touch sensor S10 corresponding to the detection unit 20 that overlaps the tongue contact range C3, with a distribution in which the output values of the touch sensors S22 and S23 corresponding to 33 are maximized.

Based on the output values (capacitance) of the touch sensors S20 to S30 corresponding to the detection units 30 to 40 that are output as described above, the CPU 5 contacts the lip L (position of the center of gravity) as described later. Is calculated.
Further, the CPU 5 can determine whether or not the performer P is holding the mouthpiece 10 based on the output values of the touch sensors S20 to S30 as detection information of the lip detection unit 3.
Similarly, the CPU 5 can determine whether or not the tongue is in contact depending on whether or not the output value of the touch sensor S10 as detection information of the tongue detector 4 is equal to or greater than a predetermined threshold value.

(Calculation of the center of gravity of the lip)
The center of gravity (center of gravity position) is calculated based on the output values from the plurality of detection units 30 to 40 and the identifiers (position numbers) of the plurality of detection units 30 to 40. Hereinafter, referring to FIG. Specifically, a method for calculating the center of gravity position of the lip L will be described.
FIG. 6 is a diagram schematically illustrating the detection units 20 and 30 to 40 included in the lead 11.
In FIG. 6, the positions of the detection units 30 to 40 are represented by P1 to P11 from the tip side, and numbers “1” to “11” are given to the respective positions in order to make the following description easy to understand. .

ここで、ｎはタッチセンサの数であり、本実施形態ではｎ＝１１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。 Then, the contact position of the lead 11 of the lip L (center of gravity position _{x G),} using a position number _{x i} of the detector 30-40 and the output value _{m i} of the touch sensor S20～S30, calculated by the following equation be able to.

Here, n is the number of touch sensors, and in this embodiment, n = 11.
This equation is generally used when calculating the position of the center of gravity.

と算出される。 For example, when the output values of the touch sensors S20 to S30 corresponding to the positions “P1” to “P11” are {0, 0, 0, 0, 90, 120, 150, 120, 90, 0, 0} The center-of-gravity position x _{G of} L is

Is calculated.

In the processing of the apparatus, which performs processing center of gravity x _G lip L, such as expressed by the integer from 0 to 16383 (14 bit binary number).
Such conversion to the bit representation is the same as the conversion to the general bit representation, but in this embodiment, since the position numbers x _i of the detection units 30 to 40 are from 1 to 11, minimum numerical position x _G is not 1 becomes 0.
Therefore, in order to minimize numerical center of gravity x _G assigns a 0 when 1, a value obtained by subtracting 1 from the gravity center position x _G (that is, if the above example, 6.0) to the bit representation using Conversion, that is, 6.0 is divided by the maximum number of electrodes 11 and then multiplied by 16383.

(Changes in the position of the center of gravity due to humidity and temperature)
With reference to FIGS. 7-9, the fluctuation | variation of the gravity center position by humidity and temperature and its correction method are demonstrated.
FIG. 7 is a diagram showing an example of the relationship between the position on the lead 11, the output value of the lip sensor, and the first and second gravity center positions immediately after the player P holds the mouthpiece 10.
FIG. 8 shows an example of the relationship between the position on the lead 11, the output value of the lip sensor, and the first and second barycentric positions when the player P plays with holding the mouthpiece 10. FIG.
FIG. 9 is a diagram illustrating an example of a state in which the first barycentric position is corrected in FIG. 8.
In the graphs included in FIGS. 7 to 9, the horizontal axis indicates the position on the lead 11, and the vertical axis indicates the output value of the sensor at each position.

The first barycentric position is a barycentric position calculated based on the output values of all the detection units 30 to 40, and the first barycentric position indicates the contact position of the lip L with the lead 11 described above.
The second barycentric position is calculated based on an output value excluding an output value from the detecting part on the tip end side (tip side) among at least one of the outputs from the detecting part used for obtaining the first barycentric position. It is the position of the center of gravity.

  As will be described in detail later, for example, the second center of gravity position is more heel side (base end side) than the first center of gravity position from the viewpoint of easily avoiding the influence of the temperature of the lip L in contact with the lead 11. Preferably, it is calculated based on the output value from each of the detection units located in the position, and in the example described below, the output value and identifier (2) from each of the detection units located on the heel side at least two from the first center of gravity position. The case where the second center-of-gravity position is obtained based on the position number of each detection unit) will be described.

Here, when the player P performs a performance while holding a state in which a specific position on the lead 11 is held, the detection unit on the lead 11 located in the oral cavity of the player P is more relative to the outside air. Exposure to high humidity and temperature.
Further, in the lead 11, the detection unit corresponding to the portion where the lip L of the player P is in firm contact (near the first center of gravity position) is easier to transmit the body temperature than the other detection units, and the temperature is relatively high. Become.
And if the detection parts 30-40 which are electrostatic capacitance systems continue to be exposed to high temperature or high humidity, the output value may fluctuate.

For example, in a state where the player P starts to hold the mouthpiece 10, for example, the distribution of output values {50, 190, 232, 240, 255, 255, 246, 234, 221 and 82 as shown in FIG. , 20} is obtained.
At this time, the first center of gravity position is calculated as 5.7 using all output values, and the second center of gravity position is a position on the heel side (on the base end side) two or more from the first center of gravity position according to the above definition. It is calculated as 8.8 using the output values from the detection units P8 to P11.

If the player P holds the position of the lip L on the lead 11 for several minutes, for example, the output values at the positions P1 to P4 in the oral cavity increase due to high humidity as shown in FIG. 60, 200, 239, 245}.
At this time, the first centroid position is calculated as 5.6, and the second centroid position is calculated as 8.8.

  As described above, since the contact position of the lip L is maintained, it is desirable that the first center of gravity position is also maintained, but the calculation result indicates a change in the first center of gravity position (for example, movement toward the tip side). Sometimes.

  On the other hand, since the positions P8 to P11 are located on the opposite side of the lip L from the inside of the oral cavity, the output values corresponding to the positions P8 to P11 remain unchanged and are calculated based on the output values. The second center of gravity position is also maintained.

  In addition, if the player P holds the mouthpiece 10 for a long time, the force of holding becomes weak, and even if the contact position of the lip L with the lead 11 does not change, the output value of each detection unit is It may be relatively small.

  However, when the contact position of the lip L with the lead 11 does not change and the gripping force is merely weakened, the output value of each detector only changes relatively, and the relative Even if the first centroid position and the second centroid position are calculated on the basis of the output value that has become smaller, the obtained centroid position (the first centroid position and the second centroid position) itself is before the gripping force becomes weaker. The same position as the centroid position (first centroid position and second centroid position) is calculated.

  In this embodiment, the CPU 5 calculates based on the current output value (current output value) based on the relationship between the output value of the detection unit and the gravity center position (first gravity center position and second gravity center position). It is determined whether the second center of gravity position is the same as the second center of gravity position based on the past output value (initial output value). If these second center of gravity positions are the same, The first centroid position based on the initial output value is adopted as the centroid position.

For example, consider a scene where the output value changes from the situation shown in FIG. 7 to the situation shown in FIG.
At this time, as shown in FIG. 9, the second barycentric position is maintained from the past to the present, while the first barycentric position varies from 5.7 to 5.6.

However, the first centroid position has changed although the second centroid position has not changed. As described above, the output values at the positions P1 to P4 in the oral cavity fluctuated due to the influence of humidity and temperature. Therefore, the CPU 5 performs a process of adopting the past center of gravity position 5.7 as the current center of gravity position.
Thereby, it becomes possible to suppress an unnecessary change in sound caused by a change in the center of gravity position due to high humidity and high temperature.

[Operation of electronic musical instrument]
The operation of the electronic musical instrument 100 described above will be described in more detail with reference to FIGS.
FIG. 10 is a flowchart showing the main routine.
FIG. 11 is a flowchart showing a processing flow of the lip detection unit 3.

(Main routine)
The main operation of the electronic musical instrument 100 or the control method of the electronic musical instrument 100 will be described with reference to FIG.
The subject of the operation described below is the CPU 5.

When the power is turned on, in step ST11, the CPU 5 performs an initialization process.
Such processing is, for example, initialization of various settings.

Next, in step ST12, the CPU 5 performs processing of the lip detection unit 3.
This step is a process corresponding to the contact state of the lip L with the lead 11, and will be described in detail later with reference to FIG.

In step ST <b> 13, the CPU 5 performs processing of the tongue detection unit 4.
This step is processing according to the contact state of the tongue with the lead 11 described above.
In step ST <b> 14, the CPU 5 performs processing of the breath pressure detection unit 2.
This step is the above-described detection process of the amount of breath blowing.

Next, in step ST15, the CPU 5 performs a key switch process.
In the key switch process, the CPU 5 generates a key code corresponding to the operation information of the operator 1 and supplies it to the sound source 8.

In step ST16, the sound source 8 performs a sound generation process.
In such processing, the sound source 8 operates the sound system 9 based on a command (key code or the like) from the CPU 5.

After step ST16, in step ST17, the CPU 5 performs other necessary processes, completes a series of processing procedures, and repeats the processes in steps ST12 to ST17 described above.
This is the process flow of the main routine.

(Lip detection unit processing)
Next, the processing of the lip detection unit 3 in step ST12 described later will be described in detail with reference to FIG.
Such processing is also processing in which the CPU 5 as the control means is the main body of operation.

First, in step ST21, the CPU 5 acquires the output values of the touch sensors S20 to S30 and stores them in the RAM 7 as current output values.
That is, the output value of the touch sensor in the area for storing the current output value provided in the RAM 7 is updated.
In addition, since the output values of the touch sensors S20 to S30 are values that are output corresponding to the detection units 30 to 40 of the touch sensors S20 to S30, the acquisition destinations of the output values are the detection units 30 to 40. Therefore, in the following, it may be simply referred to as an output value from the detection units 30 to 40.
The update of the output value (output value from the detection unit) of the touch sensor to the area for storing the current output value is performed every time the subroutine of FIG. 11 is executed in order to perform step ST12 of the main routine of FIG. Will be done.
In the following description, each output value from the detection units 30 to 40 may be simply expressed as an output value.

However, as will be described later, the current output value acquired at a specific timing is treated as a reference output value, and in the following, the current output value acquired at this specific timing is referred to as the initial output value. Sometimes called.
The current output value to be treated as the initial output value acquired at this specific timing is a storage area of the RAM 7 (an area for storing the initial output value) different from that for storing the current output value. ) And is stored so as to be updated only at a specific timing.

  Further, the RAM 7 stores an area for storing the calculated current first centroid position and the current second centroid position based on the current output value, and an initial value calculated based on the initial output value. An area for storing one centroid position and an initial second centroid position is also provided.

Next, in step ST <b> 22, the CPU 5 determines whether the player P is currently holding the mouthpiece 10 based on the current output value from the detection units 30 to 40.
At this time, if it is determined that the player P is not holding the mouthpiece 10, the procedure proceeds to step ST23.
This determination can be made based on, for example, whether the output values corresponding to all the detection units 30 to 40 are equal to or less than a predetermined value.

When it is determined in step ST22 that the player P does not hold the mouthpiece 10, in step ST23, the CPU 5 indicates that the player P does not hold the mouthpiece 10 (for example, flg = 0). ) And return to the main routine.
Note that “flg” is an index for determining whether or not the player P has held the mouthpiece 10 at the time of the previous process. In the initialization process of step ST11 described with reference to FIG. 0 ”.

On the other hand, if it is determined in step ST22 that the player P is currently holding the mouthpiece 10, the procedure proceeds to step ST24.
In step ST24, the CPU 5 determines whether the player P has not held the mouthpiece 10 until the previous time.

Specifically, since the flag flg stored in the RAM 7 does not become flg = 1 unless it proceeds to step ST26 once, the CPU 5 checks whether the flag flg stored in the RAM 7 is flg = 0. Thus, if flg = 0, it is determined that the player P has not held the mouthpiece 10 until the previous time.
If flg = 0, the process proceeds to step ST25. If flg = 1, the process proceeds to step ST27.

When the process proceeds to step ST25 with flg = 0, in step ST25, the CPU 5 calculates the first centroid position and the second centroid position based on the current output value.
For example, as described above, the second center-of-gravity position is detected on the heel side (base end side) with respect to the first center-of-gravity position among the current output values used to obtain the first center-of-gravity position. It calculates based on the output value from a part.
Here, the case of proceeding to step ST25 is when the player P first holds the mouthpiece 10, and the current output value at this timing is stored in the RAM 7 as an initial output value.
Further, based on the initial output value and the identifiers (position numbers) of the plurality of detection units 30 to 40, the current first centroid position and the current second centroid position obtained are the initial first centroid position and the initial centroid position. Is stored in the RAM 7 as the second center of gravity position.
Hereinafter, when the first centroid position or the second centroid position is obtained based on the output value and the identifier (position number), it may be described that the first centroid position is simply obtained based on the output value.

In subsequent step ST <b> 26, the CPU 5 records a flag (for example, flg = 1) indicating that the performer P is holding the mouthpiece 10 in the RAM 7.
Then, the process returns to the main routine.
Returning to the main routine shown in FIG. 10, in step ST16, the CPU 5 performs a process of generating a tone generated based on the initial first barycentric position.

On the other hand, when flg = 1 in step ST24 and the process proceeds to step ST27, in step ST27, the CPU 5 obtains the current second center-of-gravity position based on the current output value.
Here, since the second centroid position to be obtained is used for comparison with the initial second centroid position as described in step ST28, an output value for obtaining the initial second centroid position is acquired. It is calculated based on the current output value and identifier obtained from each of the detected units.
That is, different detection units are not used for obtaining the initial second center-of-gravity position and for obtaining the current second center-of-gravity position.
Note that the state of proceeding to step ST27 is not the first time that the player P has given the mouthpiece 10.
For this reason, although the process of rewriting the data of the area for storing the current second center of gravity position of the RAM 7 with the current second center of gravity position obtained in step ST27 is performed, the area for storing the initial second center of gravity position of the RAM 7 is stored. Do not update.

Next, when proceeding to step ST28, the CPU 5 compares the initial second centroid position stored in the RAM 7 with the current second centroid position, so that the initial second centroid position is compared with the current second centroid position. Determine whether has changed.
Specifically, when the current second gravity center position is ± 10% or less with respect to the initial second gravity center position, the initial second gravity center position is the same as the current second gravity center position. Conversely, if the current second centroid position is not ± 10% or less with respect to the initial second centroid position, the initial second centroid position and the current second centroid position are the same. It is determined that it is not, that is, it has changed.
However, it is not always necessary that the current second center-of-gravity position is ± 10% or less with respect to the initial second center-of-gravity position. Alternatively, a predetermined threshold value X that can be correctly determined is set, and the current second centroid position may be determined to be the same if the current second centroid position is ± X% or less with respect to the initial second centroid position.

If it is determined in step ST28 that the second centroid position has not changed, the process proceeds to step ST29, where the CPU 5 sets the initial output value stored in the RAM 7 as the current first centroid position. A process of adopting the first barycentric position is executed.
When the process of step ST29 ends, the process returns to the main routine, and in step ST16, the CPU 5 performs a process of generating a tone generated based on the initial first center of gravity position.
Such processing can prevent the first center of gravity from fluctuating due to high humidity or high temperature as described above.

On the other hand, if it is determined in step ST28 that the second barycentric position has changed, the process proceeds to step ST30.
If the position of the second center of gravity has changed, it means that the lip L of the player P has moved on the lead 11, so in step ST30, the CPU 5 determines the first center of gravity based on the current output value. A process for re-determining the position is performed, and the obtained first center-of-gravity position is stored (overwritten) in an area of the RAM 7 where the current first center-of-gravity position is stored.
However, whether or not to adopt the first center-of-gravity position recalculated in step ST30 is determined by determination in step ST31 described below.

In step ST31, the CPU 5 determines whether the first gravity center position has been correctly calculated based on the current output value in step ST30.
That is, the situation in which step ST28 is Yes (change in the second center of gravity position) occurs when the lip L of the player P moves on the lead 11, and the player P still has the mouthpiece. It is determined whether the player is in a state of holding 10 or because of a change in the output value at the moment when the player P tries to stop holding the mouthpiece 10.

  For example, the situation in which step ST28 is Yes (change in the second center of gravity position) occurs due to a change in the output value at the moment when the player P tries to stop holding the mouthpiece 10. Then, each current output value acquired from the plurality of detection units 30 to 40 used for obtaining the current first center-of-gravity position in step ST30 is considered to have a value close to zero.

Accordingly, in step ST31, when all the current output values are smaller than the predetermined value, the CPU 5 determines that the first center of gravity position has not been calculated correctly, and proceeds to step ST32, and sets the flag flg to flg = 0. After recording in the RAM 7 and recording that the performer P is not holding the mouthpiece 10, the process returns to the main routine.
In the sound generation process of step ST16 of the main routine, the CPU 5 performs a mute process.

On the other hand, if it is determined in step ST31 that the first centroid position is correctly calculated, the situation in which step ST28 is Yes (change in the second centroid position) indicates that the lip L has moved on the lead 11. The player P still holds the mouthpiece 10.
For this reason, in order to make the state of the position of the new lip L an initial state, when step ST31 is Yes, the CPU 5 performs a process of setting the current output value as a new initial output value.

  Specifically, the current output value is stored in an area of the RAM 7 where the initial output value is stored, and the current second centroid position and the current first centroid position obtained in steps ST27 and ST30 are stored in the RAM 7 in the initial stage. The second center of gravity position and the initial first center of gravity position are stored in an area for storing them (overwriting process is performed).

If it is not determined in step ST22 in the first stage that the player P is holding the mouthpiece 10, the process does not proceed to step ST30. Therefore, the player P moves the mouthpiece 10 in the state of proceeding to step ST30. There is a high possibility that the position of the second center of gravity is changed due to the movement of the lip L while it is held.
Accordingly, step ST31 and step ST32 are only confirmations, and may be omitted as necessary.

Thus, in the present embodiment, focusing on the second centroid position that is not affected by temperature and humidity, it can be determined that the position of the lip L has not changed while the second centroid position has not changed. While the second centroid position has not changed, the first centroid position based on the initial output value is applied as the current first centroid position, so that the first centroid position varies due to high humidity or high temperature. However, it can be made not to be affected.
Therefore, it is possible to prevent a sound change unintended by the player P caused by high humidity or high temperature.

  As described above, the electronic musical instrument, the control method of the electronic musical instrument, and the program for the electronic musical instrument of the present invention have been described based on the specific embodiment. However, the present invention is limited to the specific embodiment described above. It is not a thing.

  In the above description, an electronic musical instrument having a lead provided with a capacitive touch sensor has been described as an example. Similarly, an electronic musical instrument having a lead having a sensor whose output value fluctuates due to the influence of humidity or temperature may be used. .

  Moreover, in the said embodiment, 2nd or more 2nd gravity center positions are the base end part side more than 1st gravity center position among the output values and identifiers (position number of a detection part) used for calculating | requiring 1st gravity center position. Based on the output value and the identifier (position number of the detection unit) of each detection unit located on the (heel side), it is obtained.

  However, the present invention is not necessarily limited to this, and the output value and identifier of at least one detection unit on the tip end side (tip side) of the output value and identifier used to obtain the first centroid position are excluded. The second centroid position of the lip L on the lead 11 may be obtained based on the output value and the identifier.

  However, as described above, since the detection portion on the base end side (heel side) with respect to the first center of gravity position is outside the oral cavity of the player P, the influence of humidity and temperature does not easily appear. It is preferable to obtain the second center-of-gravity position based on the output value and identifier (position number of the detection unit) of each detection unit on the base end side (heel side).

  As described above, the present invention is not limited to specific embodiments, and the technical scope of the present invention includes various modifications and improvements within the scope of achieving the object of the present invention. This will be apparent to those skilled in the art from the scope of the claims.

The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
<Claim 1>
A lead having a plurality of detection units arranged from the distal end portion toward the proximal end portion;
A control unit that performs control according to an identifier of each of the detection units and an output value from each of the detection units,
The controller is
A process of acquiring an output value from each of the detection units;
Based on the initial output value and identifier of each of the detection units acquired from each of the detection units, a process for obtaining an initial first center of gravity position of the lip on the lead;
The initial output value and identifier excluding the initial output value and identifier of at least one of the detection units on the tip side among the initial output value and identifier used to determine the initial first center-of-gravity position A process for determining an initial second center-of-gravity position of the lip on the lead,
Obtaining the current second centroid position of the lip on the lead based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the initial second centroid position, A process of determining whether the second center of gravity position and the current second center of gravity position are the same;
A process of generating a tone generated based on the initial first centroid position when the determination process determines that the initial second centroid position is the same as the current second centroid position; , An electronic musical instrument that performs processing.
<Claim 2>
The control unit further sets the current output value acquired from each of the detection units to a new one when the initial second centroid position and the current second centroid position are determined not to be the same. The electronic musical instrument according to claim 1, wherein processing for setting an initial output value is performed.
<Claim 3>
In the process of determining whether the initial second centroid position is the same as the current second centroid position, the current second centroid position is ± 10% or less with respect to the initial second centroid position. In some cases, it is determined that the initial second centroid position is the same as the current second centroid position, and the current second centroid position is ± 10% or less with respect to the initial second centroid position. If not, the electronic musical instrument according to claim 1 or 2, wherein the initial second centroid position and the current second centroid position are determined not to be the same.
<Claim 4>
Control of an electronic musical instrument comprising: a lead having a plurality of detection units arranged from the front end portion toward the base end portion; and a control unit that performs control according to an identifier of each detection unit and an output value from each detection unit A method,
A process of acquiring an output value from each of the detection units;
Based on the initial output value and identifier of each of the detection units acquired from each of the detection units, a process for obtaining an initial first center of gravity position of the lip on the lead;
The initial output value and identifier excluding the initial output value and identifier of at least one of the detection units on the tip side among the initial output value and identifier used to determine the initial first center-of-gravity position A process for determining an initial second center-of-gravity position of the lip on the lead,
Obtaining the current second centroid position of the lip on the lead based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the initial second centroid position, A process of determining whether the second center of gravity position and the current second center of gravity position are the same;
A process of generating a tone generated based on the initial first centroid position when the determination process determines that the initial second centroid position is the same as the current second centroid position; The control method which performs processing including.
<Claim 5>
A lead for an electronic musical instrument, comprising: a lead having a plurality of detection units arranged from the front end portion toward the base end portion; and a control unit that performs control according to an identifier of each of the detection units and an output value from each of the detection units. A program,
A process of acquiring an output value from each of the detection units for the control unit;
Based on the initial output value and identifier of each of the detection units acquired from each of the detection units, a process for obtaining an initial first center of gravity position of the lip on the lead;
The initial output value and identifier excluding the initial output value and identifier of at least one of the detection units on the tip side among the initial output value and identifier used to determine the initial first center-of-gravity position A process for determining an initial second center-of-gravity position of the lip on the lead,
Obtaining the current second centroid position of the lip on the lead based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the initial second centroid position, A process of determining whether the second center of gravity position and the current second center of gravity position are the same;
A process of generating a tone generated based on the initial first centroid position when the determination process determines that the initial second centroid position is the same as the current second centroid position; A program that executes processing including

100 Electronic musical instrument 3 Lip detection unit 5 CPU (control unit)
10 Mouthpiece 11 Lead (Electronic musical instrument lead)
30 to 40 detector S20 to S30 touch sensor

Claims (5)

A lead having a plurality of detection units arranged from the distal end portion toward the proximal end portion;
A control unit that performs control according to an identifier of each of the detection units and an output value from each of the detection units,
The controller is
A process of acquiring an output value from each of the detection units;
Based on the initial output value and identifier of each of the detection units acquired from each of the detection units, a process for obtaining an initial first center of gravity position of the lip on the lead;
The initial output value and identifier excluding the initial output value and identifier of at least one of the detection units on the tip side among the initial output value and identifier used to determine the initial first center-of-gravity position A process for determining an initial second center-of-gravity position of the lip on the lead,
Obtaining the current second centroid position of the lip on the lead based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the initial second centroid position, A process of determining whether the second center of gravity position and the current second center of gravity position are the same;
A process of generating a tone generated based on the initial first centroid position when the determination process determines that the initial second centroid position is the same as the current second centroid position; , An electronic musical instrument that performs processing.   The control unit further sets the current output value acquired from each of the detection units to a new one when the initial second centroid position and the current second centroid position are determined not to be the same. The electronic musical instrument according to claim 1, wherein processing for setting an initial output value is performed.   In the process of determining whether the initial second centroid position is the same as the current second centroid position, the current second centroid position is ± 10% or less with respect to the initial second centroid position. In some cases, it is determined that the initial second centroid position is the same as the current second centroid position, and the current second centroid position is ± 10% or less with respect to the initial second centroid position. If not, the electronic musical instrument according to claim 1 or 2, wherein the initial second centroid position and the current second centroid position are determined not to be the same. Control of an electronic musical instrument comprising: a lead having a plurality of detection units arranged from the front end portion toward the base end portion; and a control unit that performs control according to an identifier of each detection unit and an output value from each detection unit A method,
A process of acquiring an output value from each of the detection units;
Based on the initial output value and identifier of each of the detection units acquired from each of the detection units, a process for obtaining an initial first center of gravity position of the lip on the lead;
The initial output value and identifier excluding the initial output value and identifier of at least one of the detection units on the tip side among the initial output value and identifier used to determine the initial first center-of-gravity position A process for determining an initial second center-of-gravity position of the lip on the lead,
Obtaining the current second centroid position of the lip on the lead based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the initial second centroid position, A process of determining whether the second center of gravity position and the current second center of gravity position are the same;
A process of generating a tone generated based on the initial first centroid position when the determination process determines that the initial second centroid position is the same as the current second centroid position; The control method which performs processing including. A lead for an electronic musical instrument, comprising: a lead having a plurality of detection units arranged from the front end portion toward the base end portion; and a control unit that performs control according to an identifier of each of the detection units and an output value from each of the detection units. A program,
For the control unit
A process of acquiring an output value from each of the detection units;
Based on the initial output value and identifier of each of the detection units acquired from each of the detection units, a process for obtaining an initial first center of gravity position of the lip on the lead;
The initial output value and identifier excluding the initial output value and identifier of at least one of the detection units on the tip side among the initial output value and identifier used to determine the initial first center-of-gravity position A process for determining an initial second center-of-gravity position of the lip on the lead,
Obtaining the current second centroid position of the lip on the lead based on the current output value and the identifier obtained from each of the detection units that obtained the output value for obtaining the initial second centroid position, A process of determining whether the second center of gravity position and the current second center of gravity position are the same;
A process of generating a tone generated based on the initial first centroid position when the determination process determines that the initial second centroid position is the same as the current second centroid position; A program that executes processing including

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