JP2019008122A - Detector, electronic musical instrument, detection method and control program - Google Patents

Abstract

Provided are a detection device, an electronic musical instrument, a detection method, and a control program capable of determining a more correct operation position when an operator operates a device using a part of the body. A maximum value max (1-10) based on a distribution of sensor output values obtained from a plurality of sensors 30 to 39 arranged in a lead portion 11 with a mouthpiece 10 of an electronic musical instrument 100 held. The sensor output value is extracted. Paying attention to the sensor output value on the back side (heel side) from the sensor position of the extracted maximum value max (1-10), the sensor crosses the threshold TH set to a predetermined ratio of the maximum value max (1-10) Two adjacent sensors having output values are extracted. The lip position PS (Rear) is determined based on the equation (16) using the extracted position numbers PL and PR of the two sensors and the sensor output values VPL and VPR. [Selection] Figure 9

Description

  The present invention relates to a detection device that detects an operation position, an electronic musical instrument, an operation position detection method, and a control program for detecting the operation position.

  2. Description of the Related Art Conventionally, electronic wind instruments that imitate the shape and playing method of acoustic wind instruments such as saxophones and clarinets are known. In the performance of such an electronic wind instrument, the pitch of a musical tone is designated by operating a switch (pitch key) provided at a key position similar to that of an acoustic wind instrument. Further, the volume is controlled by the blowing pressure of the breath blown into the mouthpiece, and the timbre is controlled by the position of the lips when the mouthpiece is held in the mouth, the contact state of the tongue, the biting pressure, and the like.

  For this reason, the conventional mouthpiece of an electronic wind instrument is provided with various sensors for detecting the blowing pressure, the position of the lips, the contact state of the tongue, the biting pressure, and the like caused by the breath blown during performance. For example, in Patent Document 1, a plurality of capacitive touch sensors are arranged on the lead part of the mouthpiece of an electronic wind instrument, and the lips and tongues of the performer are based on the detection values and arrangement positions of the sensors. A technique for detecting a contact state and a contact position is described.

JP 2017-58502 A

  In the above-described electronic wind instrument, for example, when playing while holding the mouthpiece like an acoustic performance, the same position of the lead portion can be held for a long time. At this time, the air inlet side (tip side) of the lead portion is positioned in the oral cavity of the player for a long time.

  In general, it is known that in a capacitive touch sensor, a detection value varies due to the influence of moisture and temperature. Therefore, the mouthpiece (lead part) is affected by the increase in moisture and temperature in the oral cavity caused by holding the mouthpiece for a long time, and the direct effect of tongueging that stops the tremor by bringing the tongue into contact with the lead part. There is a tendency that the variation in the detection value of the sensor arranged on the inlet side (tip side) from near the center of the nozzle increases. As a result, in the conventional electronic wind instrument, the position of the lip (lip position) that is finally detected varies, and an acoustic wind feeling or a musical tone effect intended by the player (for example, a tone effect such as pitch bend or vibrato) ) Could not be fully realized.

  Note that the variation in the detection value of the sensor of the lead portion is not limited to the above-mentioned causes, but also due to various factors such as how to hold the mouthpiece, playing time, performer's sex, age, constitution, etc. It is what happens. In addition, the position of the sensor where the detection value varies may occur not only on the air inlet side (tip side) of the lead part described above but also on the base end part side (heel side) of the lead part which is the electronic wind instrument main body side. There is.

  Also in electronic musical instruments that perform using a part of the body such as fingers other than lips, and electronic devices that perform various operations other than performance using a part of the body, depending on the state of the device and the operating environment. May cause the same problem that a desired operation may not be realized because the operation position finally detected varies.

  Therefore, in view of the above-described problems, the present invention provides a detection device, an electronic musical instrument, a detection method, and a detection device that can determine a more correct operation position when an operator operates a device using a part of the body. An object is to provide a control program.

The detection device according to the present invention is:
A plurality of sensors arranged at intervals determined in a specific direction;
A control unit that determines an operation position in the specific direction based on output values of the plurality of sensors,
The controller is
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, when an operator operates an apparatus using a part of body, a more correct operation position can be determined.

It is an external view which shows the whole structure of one Embodiment of the electronic musical instrument to which the detection apparatus which concerns on this invention is applied. It is a block diagram which shows an example of a function structure of the electronic musical instrument which concerns on one Embodiment. It is the schematic which shows an example of the mouthpiece applied to the electronic musical instrument which concerns on one Embodiment. It is the schematic which shows the contact state of a player's oral cavity and a mouthpiece. It is the figure (the 1) which shows an example of the output characteristic of a lip detection part and a tongue detection part in the state which the player held the mouthpiece, and the calculation example of a lip position. It is the figure (the 2) which shows an example of the output characteristic of a lip detection part and a tongue detection part in the state which the player held the mouthpiece, and the calculation example of a lip position. It is a figure for demonstrating the method of specifying the position where a sensor output value begins to fall characteristically in distribution of the sensor output value from a some sensor. It is a flowchart which shows the main routine of the control method in the electronic musical instrument which concerns on one Embodiment. It is a flowchart which shows the process of the lip | rip detection part applied to the control method of the electronic musical instrument which concerns on one Embodiment. It is a flowchart which shows the modification of the control method of the electronic musical instrument which concerns on one Embodiment.

  Hereinafter, embodiments of a detection apparatus, an electronic musical instrument, a detection method, and a control program according to the present invention will be described in detail with reference to the drawings. Here, an example of an electronic musical instrument to which a detection device for detecting an operation position is applied, and an electronic musical instrument control method to which the operation position detection method and a control program for detecting the operation position are applied will be described.

<Electronic musical instrument>
FIG. 1 is an external view showing the overall structure of an embodiment of an electronic musical instrument to which a detection apparatus according to the present invention is applied. FIG. 1A is a side view of the electronic musical instrument according to this embodiment, and FIG. 1B is a front view of the electronic musical instrument. Further, in the drawing, the IA portion shows a partially transparent portion of the electronic musical instrument 100.

  An electronic musical instrument 100 to which a detection apparatus according to the present invention is applied has an external appearance imitating the shape of a saxophone of an acoustic wind instrument as shown in FIGS. 1A and 1B, for example, and has a tubular casing. A mouthpiece 10 is attached to one end side (upper end side in the drawing) of the tubular body 100a, and a sound system 9 having a speaker for outputting musical sounds is provided on the other end side (lower end side in the drawing).

  Further, on the side surface of the tube portion 100a, a performance key for determining the pitch by a player (user) operating with a finger, a setting key for setting a function for changing the pitch in accordance with the music key, and the like. Etc. are provided. Further, for example, as shown in the IA section of FIG. 1B, on the substrate provided inside the tube section 100a, a breath pressure detecting section 2, a CPU (Central Processing Unit) 5 as a control means, a ROM (Read Only Memory) 6, RAM (Random Access Memory) 7, and sound source 8 are provided.

FIG. 2 is a block diagram illustrating an example of a functional configuration of the electronic musical instrument according to the present embodiment.
As shown in FIG. 2, the electronic musical instrument 100 according to the present embodiment is schematically shown as an operator 1, a breath pressure detector 2, a lip detector 3, a tongue detector 4, a CPU 5, a ROM 6, and a RAM 7. The sound source 8 and the sound system 9 are included, and the components other than the sound system 9 are connected to each other via a bus 9a. Here, the lip detection unit 3 and the tongue detection unit 4 are provided in a lead portion of a mouthpiece 10 to be described later. The functional configuration shown in FIG. 2 is an example for realizing the electronic musical instrument according to the present invention, and is not limited to this configuration. Also, among the functional configuration of the electronic musical instrument shown in FIG. 2, at least the lip detection unit 3, the tongue detection unit 4, and the CPU 5 constitute a detection device according to the present invention.

  The operator 1 accepts key operations by the performer for various keys such as the performance keys and setting keys described above, and outputs the operation information to the CPU 5. Here, the setting key provided on the operation element 1 specifically has a function of finely adjusting the pitch and a function of setting a tone in addition to a function of changing the pitch according to the key of the music. It has a function of pre-selecting a mode to be finely adjusted according to the contact state of the lip (lower lip) detected by the lip detection unit 3 from the tone color, volume and height of the musical tone.

  The breath pressure detection unit 2 detects the pressure of the breath (breath pressure) blown into the mouthpiece 10 by the player, and outputs the breath pressure information to the CPU 5. The lip detection unit 3 includes a capacitive touch sensor that detects the player's lip contact. The lip detection unit 3 determines the lip contact position or contact range, and the capacitance according to the contact area or contact strength. Is output to the CPU 5 as detection information. The tongue detection unit 4 includes a capacitive touch sensor that detects the contact of the performer's tongue (tongue), and determines the presence or absence of the tongue contact and the capacitance according to the contact area. It outputs to CPU5 as detection information.

  The CPU 5 functions as a control unit that controls each unit of the electronic musical instrument 100. The CPU 5 reads a predetermined program stored in the ROM 6 and expands it in the RAM 7 and executes various processes in cooperation with the expanded program. For example, the CPU 5 receives the operation information input from the operation element 1, the breath pressure information input from the breath pressure detection unit 2, the lip detection information input from the lip detection unit 3, and the input from the tongue detection unit 4. The sound source 8 is instructed to generate a musical sound based on the detected tongue detection information.

  Specifically, the CPU 5 sets the pitch of the musical tone based on the pitch information as the operation information input from the operator 1. Further, the CPU 5 sets the tone volume based on the breath pressure information input from the breath pressure detection unit 2, and based on the lip detection information input from the lip detection unit 3, the tone color, volume, Finely adjust at least one of the heights, and based on the detection information of the tongue (tongue) input from the tongue detection unit 4, it is determined whether or not the tongue is in contact, and the note is turned on / off. Set.

  The ROM 6 is a read-only semiconductor memory, and stores various data and programs for controlling operations and processes in the electronic musical instrument 100. In particular, in this embodiment, a program for realizing a lip position determination method (corresponding to the operation position detection method according to the present invention) applied to the electronic musical instrument control method described later is stored. The RAM 7 is a volatile semiconductor memory, and data and programs read from the ROM 6 or data generated during the execution of the program, the operator 1, the breath pressure detection unit 2, the lip detection unit 3, and the tongue detection A work area for temporarily storing each detection information output from the unit 4;

  The sound source 8 is a synthesizer, and in accordance with the musical sound generation instruction of the CPU 5 based on the operation information from the operator 1, the lip detection information from the lip detection unit 3, and the tan detection information from the tan detection unit 4, And a musical tone signal is output to the sound system 9. The sound system 9 performs processing such as signal amplification on the musical sound signal input from the sound source 8 and outputs it as a musical sound from a built-in speaker.

(Mouthpiece)
Next, the structure of the mouthpiece applied to the electronic musical instrument according to this embodiment will be described.
FIG. 3 is a schematic diagram illustrating an example of a mouthpiece applied to the electronic musical instrument according to the present embodiment. 3A is a cross-sectional view of the mouthpiece (cross-sectional view taken along the line IIIA-IIIA in FIG. 3B), and FIG. 3B is a bottom view showing the lead portion side of the mouthpiece. is there.

  As shown in FIGS. 3A and 3B, the mouthpiece 10 roughly includes a mouthpiece body 10 a, a lead portion 11, and a fixture 12, and the mouthpiece body 10 a has an opening 13. On the other hand, a thin plate-like lead portion 11 is assembled and fixed by a fixing bracket 12 so as to have a slight gap as a blow-in opening for the performer to breathe. That is, the lead portion 11 is assembled at a position on the lower side of the mouthpiece body 10a (the lower side in FIG. 3A) and fixed by the fixing bracket 12 in the same manner as the lead of a general acoustic wind instrument. The portion (hereinafter referred to as “heel”) is a fixed end, and the blowing port side (hereinafter referred to as “tip side”) forms a free end.

  Further, as shown in FIGS. 3A and 3B, for example, the lead portion 11 includes a lead substrate 11a made of a thin plate-like insulating member and a tip side (one end side) in the longitudinal direction of the lead substrate 11a. And a plurality of sensors 20 and 30 to 40 arranged toward the heel side (the other end side). Here, the sensor 20 is a capacitive touch sensor included in the tongue detection unit 4, and the sensors 30 to 40 are capacitive touch sensors included in the lip detection unit 3. All of these sensors 20 and 30 to 40 have electrodes as sensing pads. The electrodes forming the sensors 30 to 40 have substantially the same width and length, and are arranged at substantially equal intervals from the tip side of the lead portion 11 toward the heel side. In addition, in FIG.3 (b), although each electrode which forms the sensors 30-40 was shown by the rectangular shape, this invention is not limited to this, For example, planar shapes, such as V shape and a wave shape, are shown. The electrodes may be provided, and each electrode may be set to an arbitrary size and number.

Next, the contact state between the above-described mouthpiece and the player's oral cavity will be described.
FIG. 4 is a schematic diagram showing a contact state between the performer's oral cavity and the mouthpiece.

  When playing the electronic musical instrument 100, for example, as shown in FIG. 4, the performer places the upper front tooth E1 on the upper part of the mouthpiece body 10a and wraps the lower front tooth E2 with the lower lip (lower lip) LP. Press against the lead part 11. As a result, the mouthpiece 10 is sandwiched and held between the upper front teeth E1 and the lip LP from above and below.

  In addition, the tongue (tongue) inside the oral cavity during performance is in a state where the tongue is in contact with the lead portion 11 according to the performance of the electronic musical instrument 100 as shown in FIG. 4 (indicated by a solid line TN1 in the figure). And a state where the tongue does not touch the lead portion 11 (indicated by a two-dot chain line TN2 in the figure).

  The sensors 20 and 30 to 40 arranged in the lead portion 11 shown in FIG. 3 have the contact state of the lip LP to each electrode and the contact state of the tongue (tan TN1: contact or tongue TN2: Non-contact) is detected, and the detection information is output to the CPU 5. The CPU 5 determines that the tongue has contacted based on the detection information output from the sensor 20 and also determines the contact position (lip) of the lip LP in the lead portion 11 based on the detection information output from the sensors 30 to 40. Position).

(Output characteristics of lip detector and tongue detector)
Next, output characteristics of the lip detection unit and the tongue detection unit in a state where the performer holds the above-described mouthpiece will be described.

  5 and 6 are diagrams illustrating an example of output characteristics of the lip detection unit and the tongue detection unit in a state where the performer holds the mouthpiece, and a calculation example of the lip position. Here, FIG. 5A is a diagram showing a distribution example of the sensor output values (detection information) of the lip detection unit and the tan detection unit in a state where the performer is only holding the mouthpiece (not performing the tangging). FIGS. 5B and 5C are examples of lip positions (comparative example, this embodiment) calculated based on the sensor output values shown in FIG. 5A, respectively. FIG. 6A is a diagram showing a distribution example of sensor output values (detection information) of the lip detection unit and the tan detection unit in a state where the performer is holding the mouthpiece and performing tangling. (B), (c) is an example (comparative example, this embodiment) of the lip position calculated based on the sensor output value shown to Fig.6 (a), respectively.

  As described above, in the mouthpiece 10 according to the present embodiment, the contact state of the lip (lower lip) LP and the tongue (tongue portion) with the lead portion 11 is determined based on the plurality of sensors 20 arranged on the lead substrate 11a, A detection method based on the electrostatic capacity of each of 30 to 40 electrodes is adopted. Here, since the plurality of sensors 20 and 30 to 40 are arranged in a line in the longitudinal direction of the lead substrate 11a, in a state where the performer normally holds the mouthpiece 10 and does not perform the tongue, FIG. As shown to a), the sensor (for example, sensors 32-38) of the area | region where the lip LP is touching the lead part 11 reacts, and the sensor output value shows a large value. On the other hand, the sensor output values from the sensors (for example, the sensors 30 and 40) before and after (the tip side and the heel side) of the area touched by the lip LP are relatively low values. That is, the distribution of the sensor output values from the sensors 20 and 30 to 40 in this case is as follows. As shown in FIG. 5A, the sensor output values from the sensor at the position where the player makes the lip LP most strongly contacted. It has the feature which shows the mountain shape which makes the maximum value. In the distribution diagram of the sensor output values shown in FIG. 5A, the horizontal axis indicates the positions PS0, PS1 of the sensors 20, 30 to 40 arranged from the tip side to the heel side on the lead substrate 11a. ... PS10, PS11 are shown, and the vertical axis shows voltage values (sensor output values) output from the sensors 20, 30-40 at the positions PS0, PS1, ... PS10, PS11. The same applies to FIG. 6A.

  Further, in the state where the tongue is performed during the performance, that is, the player holds the mouthpiece, the tongue is performed as shown by the tongue TN1 in FIG. The sensor 20 reacts in the state of contact with the tip side end, and the sensor output value protrudes and shows a large value as shown in FIG. At this time, a sensor (for example, sensors 30 to 32) arranged in proximity to the sensor 20 touched by the tongue TN1 may also react to increase the sensor output value.

(Rip position calculation method)
Next, a method for calculating the lip contact position (lip position), which is the position where the lip is most strongly brought into contact when the performer holds the mouthpiece, will be described.

As a method for calculating the lip position based on the distribution of the sensor output values as described above, a general method for calculating the center of gravity position can be applied. Specifically calculated position of the center of gravity, based on the sensor output value m _i from a plurality of sensors for detecting the contact state of the lip, the number x _i indicating the position of each sensor, the following equation (11) Is done.

In the above equation (11), n is the number of sensor output values used for calculating the gravity center position. Here, among the sensor output values from the sensors 20 and 30 to 40 shown in FIG. 5A, the sensors 20 disposed at the first tip side of the lead portion 11 and both end portions on the first heel side. were excluded sensor output value from the 40, using 10 (n = 10) sensor output value _{m i} of the sensor 30 to 39 of the calculation of the position of the center of gravity. Further, the position numbers x _i (= 1, 2,..., 10) of the sensors are set corresponding to the positions PS1 to PS10 of these sensors 30 to 39.

  Here, the reason for excluding the sensor output value from the sensor 20 is that, as shown in FIG. 6A, the sensor output value may protrude and show a large value due to the tongueing, and the accurate lip position calculation is performed. This is in order to eliminate the influence on the. Further, the reason why the sensor output value from the sensor 40 is excluded is that it is arranged on the innermost side (ie, the heel side) of the mouthpiece 10 and there is almost no opportunity for the lip LP to come in contact with the performance. This is because it is not used in the calculation of. The sensor output value from the sensor 40 is also used for detecting the temperature of the mouthpiece 10, and is used for processing for offsetting the influence of temperature on the sensor output values from the sensors 20, 30-40.

Based on the sensor output value shown in FIG. 5A, the centroid position is calculated by using the above equation (11) to obtain the lip position, as shown in FIG. 5B, it is “68”. A numerical value is obtained. Here, Total1 shown in FIG. 5 (b), a molecule of the above (11), is the sum of the product of the position numbers x _i between the sensor output value m _i of each sensor 30-39. Further, Total2 is a denominator of the above equation (11), is the sum of the sensor output value _{m i} from the sensors 30-39. The lip position PS (1-10) shown in FIG. 5B is a numerical value expressed by 7 bits in order to convert it into a MIDI signal used in the sound source 8 (assigned to a value of 0 to 127). is there.

  By the way, when the calculation of the position of the center of gravity using the above equation (11) is applied to the sensor output value when the tongue is performed as shown in FIG. 6A, as described above, The sensor output value from the sensor 20 touched by the tongue and the sensors in the vicinity thereof or the sensors (for example, the sensors 30 to 32) located in the oral cavity of the performer is affected by the change of the tongue or the humidity or temperature in the oral cavity. In response, it may fluctuate (increase). Therefore, in the method of applying the center of gravity position calculation method to the sensor output value as described above, the lip position may not be obtained accurately.

Specifically, as shown in FIGS. 5A and 5B, the lip position PS (1-10) is 7 bits when the performer normally holds the mouthpiece and does not hang. Although it was “68” in the expression, as shown in FIGS. 6A and 6B, the lip position PS (1-10) is greatly changed to “65” in the state where the tongue is performed. Therefore, it becomes impossible to realize the effect of wind feeling and musical tone intended by the performer in the sound generation process described later. Incidentally, as shown in FIG. 5 (b) and 6 (b), the sensor output values from the sensors 30-39, and calculates the barycentric position _{x G} using the above expression (11) A method for obtaining the lip position is referred to as a “comparative example” for convenience.

  Therefore, in the present embodiment, among the sensors 20, 30-40, sensor outputs from the sensors 30-39, excluding the sensors 20, 40 disposed at both ends of the tip 11 and the heel side of the lead portion 11, are excluded. Regarding the value, first, the position of the sensor having the maximum value max (1-10) is extracted. And the position which shows the characteristic change which a sensor output value begins to fall with respect to the sensor output value of the sensor arrange | positioned from the said position in the back | inner side of the mouthpiece 10 (or the heel side of the lead part 11) is specified. Thus, a series of methods for determining the lip position indicating the outer edge portion of the lip (lower lip) LP is employed.

  Here, the method of specifying the position where the sensor output value starts to fall and determining it as the lip position is applied for the following reason. (1) Since the heel side (that is, the back side of the mouthpiece 10) of the lead board 11a is in contact with the lip (lower lip) LP is outside the performer's oral cavity, The influence (fluctuation) of the noise on the sensor output value due to the change is blocked or suppressed with the outer edge portion of the lip LP as a boundary.

(2) Since the change of the sensor output value at a position sufficiently separated from the tip side sensor 20 of the lead substrate 11a with which the tongue (tongue) contacts is determined, the sensor output value is not easily affected by the tongue. (3) From the viewpoint of signal processing, the process of extracting the maximum value from the distribution of sensor output values and the process of specifying the position where the sensor output value begins to drop characteristically from the position where the maximum value is achieved are relatively easy and Can be performed accurately. Thereby, according to the method according to the present embodiment, it is possible to calculate an accurate lip position without being substantially affected by the change of the tongueing, the moisture in the oral cavity, or the temperature.

(How to determine the lip position)
The lip position determination method applied to this embodiment will be described in detail below.
FIG. 7 is a diagram for explaining a method for specifying a position where sensor output values start to drop characteristically in the distribution of sensor output values from a plurality of sensors. Fig.7 (a) is a figure which shows the change of the sensor output value from a sensor, FIG.7 (b) is a schematic diagram at the time of determining a lip position.

  In the lip position determination method applied to the present embodiment, first, the sensor output having the maximum value max (1-10) from the sensor output values from the sensors 30 to 39 arranged in the lead portion 11 described above. Extract the value. Next, a predetermined ratio of the maximum value max (1-10) of the extracted sensor output value, for example, a value in a range of 70 to 80% (70 to 80%) is set as the threshold value TH.

  Next, in the distribution of the sensor output values from the sensors 30 to 39, the sensor arranged on the back side (heel side) of the mouthpiece 10 from the sensor position where the sensor output value becomes the maximum value max (1-10) is targeted. Thus, two adjacent sensors whose sensor output values cross the above threshold TH are extracted.

Here, in the sensor arranged on the back side (heel side) from the sensor position where the sensor output value becomes the maximum value max (1-10), as shown in FIGS. The sensor output value decreases (decreases) from the position where the maximum value max (1-10) is reached toward the back side (heel side). Therefore, when the sensor output value crosses the threshold value TH, as shown in FIG. 7 (a), any two adjacent sensors arranged on the back side from the position where the maximum value max (1-10) is obtained. This means that the relationship of the following equation (12) holds. Here, in the equations (a) and (12) in FIG. 7, PL is the position number of the sensor arranged on the tip side of the lead portion 11 among the two adjacent sensors, and PR is the position number of the lead portion 11. This is the position number of the sensor arranged on the heel side. Also, V _PL is a sensor output value from the sensor position numbers PL, V _PR is the sensor output value from the sensor position numbers PR.
V _PL >TH> V _PR (12)

FIG. 7B shows the position numbers PL and PR of two adjacent sensors extracted based on the relationship of the above expression (12) and the sensor output values V _PL and V _PR from those sensors. The lip position PS (Rear) is expressed as follows from the relationship between the lengths of the sides of the triangle shown in FIG. That is, the following equations (13) to (14) are obtained based on the relationship between the lengths of the sides of a triangle having a similar shape and the position numbers of two adjacent sensors.

  Since the lip position PS (Rear) to be obtained from the triangle shown in FIG. 7B is expressed by the following equation (15), it is expressed by equation (16) using the above equation (14). .

  As described above, in the present embodiment, two sensors sandwiching the threshold TH are extracted, and the ratio of the threshold TH in the range of the sensor output value from these sensors is determined to be within the range of the position of the sensor. The position is specified, and the specified position is determined as the lip position.

  The lip position PS (Rear) calculated by the above equation (16) can take a numerical value including a decimal number from 1.0 to 10.0, but this is converted into a 7-bit MIDI signal used in the sound source 8. In order to (assign to a value of 0 to 127), 127/9 is multiplied after subtracting 1 from the numerical value calculated by the equation (16), as shown in the following equation (17).

  Here, in the above-described lip position determination method, when the position where the sensor output value begins to drop characteristically is specified, the maximum value max (1-10) of the sensor output value from each of the sensors 30 to 39 is predetermined. The reason for applying a method of setting a value that is a ratio (for example, 70 to 80%) as the threshold value TH is based on the following reason.

  According to the verification by the inventors, the sensor output value from each sensor has a constant numerical value even in the portion where the lip (lower lip) LP is in contact with the lead substrate 11a by holding the mouthpiece 10. It is not shown, but has been found to be detected as a numerical value having a certain width (variation). It has been confirmed that the numerical range (variation) of the sensor output value has a width of about ± 10% from the past experimental results. Therefore, in this embodiment, a certain margin is added to this numerical value range, and the value of 70 to 80% (70 to 80%) of the maximum value max (1-10) of the sensor output value is set to the lip position PS. (Rear) was set as the threshold value TH when determining.

  Thus, according to the present embodiment, as shown in FIG. 5 (c), the player normally holds the mouthpiece 10 and is not tangling, and as shown in FIG. 6 (c). The lip position determined based on the above-described calculation method in the state where the tangging is performed is “118” in 7-bit expression (PS (7 bit)), and is the same or equivalent lip position PS (Rear). was gotten. As a result, it was confirmed that an accurate lip position can be calculated without being substantially affected by the change of the tongue or the moisture or temperature in the oral cavity.

  In the present embodiment, the method of setting a value that is 70 to 80% of the maximum value of the sensor output value from each sensor based on the above-described knowledge as the threshold TH when determining the lip position has been described. However, the present invention is not limited to this. In other words, the sensor output value from two adjacent sensors arranged on the back side (heel side) of the mouthpiece 10 from the sensor position where the sensor output value becomes the maximum value has a characteristic change that rapidly decreases. If the position to be shown can be specified, the above threshold value TH can be favorably applied. Specifically, the threshold value TH may be set at least between the maximum value and the minimum value of sensor output values from a plurality of sensors.

  Therefore, the threshold value TH is not limited to 70 to 80% of the sensor output value that is the maximum value. For example, a value that is 70% or less of the maximum value may be set as the threshold value TH. Alternatively, a value obtained by subtracting a predetermined value from the maximum value may be set as the threshold value TH. Further, as another setting method of the threshold TH, for example, an average value (= Total 2/10) of sensor output values from the sensors 30 to 39 used for calculating the lip position, or 1/2 (= Total 2) of the average value. / 10 × 1/2) may be applied as the threshold value TH. As yet another setting method, a value obtained by multiplying a median value of sensor output values from the sensors 30 to 39 by a predetermined ratio may be applied as the threshold value TH.

  In the present embodiment, as a method of determining the lip position, a method of extracting two adjacent sensors whose sensor output values cross a preset threshold value TH has been described, but the present invention is not limited to this. It is not something. That is, in the sensor arranged on the back side (heel side) of the mouthpiece 10 from the position of the sensor where the sensor output value becomes the maximum value, the position showing a characteristic change in which the sensor output value rapidly decreases is specified. If it is the technique which can do, it can apply favorably. For example, a single sensor having a sensor output value closer to the threshold TH may be extracted, and the lip position may be determined based on the position of the sensor, or may have a sensor output value closer to the threshold TH. However, the lip position may be determined based on the position of the sensor by extracting two or more adjacent sensors without the sensor output value straddling the threshold value TH. Here, when extracting a single sensor or a plurality of sensors (including this embodiment), the sensor may be extracted with priority from the sensor disposed on the back side (heel side) of the mouthpiece 10, In this case, the position of the mouth lip 10 on the mouth side (tip side) is corrected by the thickness of the lip (lower lip) LP set in advance from the determined lip position, and the end of the lip on the inner side of the mouth A lip position indicating the (inner edge portion) may be determined.

(Control method of electronic musical instrument)
Next, a control method in the electronic musical instrument according to the present embodiment will be described. Here, the control method of the electronic musical instrument according to the present embodiment is realized by executing a control program including a processing program of a specific lip detection unit in the CPU 5 of the electronic musical instrument 100 described above.

FIG. 8 is a flowchart showing a main routine of the control method in the electronic musical instrument according to the present embodiment.
In the electronic musical instrument control method according to this embodiment, as shown in the flowchart of FIG. 8, first, when a player (user) turns on the electronic musical instrument 100, the CPU 5 initializes various settings of the electronic musical instrument 100. An initialization process is executed (step S802).

  Next, the CPU 5 executes a process based on the detection information of the lip (lower lip) output from the lip detection unit 3 when the performer holds the mouthpiece 10 of the electronic musical instrument 100 (step S804). The processing of the lip detection unit 3 includes the lip position determination method described above, and will be described in detail later.

  Next, the CPU 5 executes processing based on the detection information of the tongue output from the tongue detection unit 4 in accordance with the contact state of the tongue (tongue) with the mouthpiece 10 (step S806). Further, the CPU 5 executes a process based on the breath pressure information output from the breath pressure detector 2 in accordance with the breath blown into the mouthpiece 10 (step S808).

  Next, the CPU 5 generates a key code corresponding to the pitch information included in the operation information of the operation element 1 and supplies it to the sound source 8 to execute a key switch process for setting the pitch of the musical tone (step S810). At this time, the CPU 5 determines the tone color, volume, and height of the musical tone based on the lip position calculated using the lip detection information input from the lip detection unit 3 in the processing of the lip detection unit 3 (step S804). Execute the process to adjust. Further, in the processing of the tongue detection unit 4 (step S806), the CPU 5 executes processing for setting note on / off of the musical sound based on the detection information of the tongue input from the tongue detection unit 4, and detects the breath pressure. In the process of the unit 2 (step S808), based on the breath pressure information input from the breath pressure detection unit 2, a process of setting the sound volume is executed. The CPU 5 generates a musical sound signal for generating a musical sound according to the performance performance of the performer by a series of these processes. Then, the sound source 8 executes a sound generation process for operating the sound system 9 based on a musical sound generation instruction from the CPU 5 (step S812).

  Thereafter, when the CPU 5 executes other necessary processing (step S814) and ends a series of processing operations, the CPU 5 repeats the above-described processing from step S804 to S814 again. Although not shown in the flowchart shown in FIG. 8, the CPU 5 detects a change in the state in which the performance ends or is interrupted during the execution of the above-described series of processing operations (steps S802 to S814). If so, the processing operation is forcibly terminated.

(Lip detection unit processing)
Next, the processing of the lip detection unit 3 shown in the main routine described above will be described.
FIG. 9 is a flowchart showing processing of the lip detection unit applied to the control method of the electronic musical instrument according to the present embodiment.

  The processing of the lip detection unit 3 applied to the control method of the electronic musical instrument shown in FIG. 8 is as shown in the flowchart of FIG. 40, the sensor output values from all the sensors 30 to 40 of the lip detection unit 3 that detects the contact state of the lip LP are acquired and stored in the predetermined storage area of the RAM 7 as the current output value (step S902). ). As a result, the sensor output values stored in the predetermined storage area of the RAM 7 are sequentially updated to the current sensor output values.

  Next, the CPU 5 determines whether or not the performer is currently holding the mouthpiece 10 based on the sensor output values (current output values) from the acquired sensors 30 to 40 (step S904). Here, as a method for determining whether or not the performer is holding the mouthpiece 10, for example, the sum of sensor output values of 10 sensors 30 to 39 (or 11 sensors 30 to 40) is calculated. When the total value exceeds a predetermined threshold value (for example, 800), it is determined that the performer is holding the mouthpiece 10, and when the total value is equal to or less than the threshold value, the mouthpiece 10 is determined. It is possible to apply a method for judging that the user has not given up.

  The determination of whether or not the mouthpiece 10 is held is not limited to the above method, and other methods may be applied. For example, when the sensor output values of 10 sensors 30 to 39 (or 11 sensors 30 to 40) are all equal to or less than a predetermined value, it is determined that the mouthpiece 10 is not held, and the sensors 30 to 39 If more than half of the sensor output values exceed the predetermined value, a method of determining that the mouthpiece 10 is held may be applied.

  If it is determined in step S904 that the performer does not hold the mouthpiece 10 (No in step S904), the CPU 5 ends the processing of the lip detection unit 3 and performs the main processing shown in FIG. Return to routine processing.

  On the other hand, if it is determined in step S904 that the performer is holding the mouthpiece 10 (Yes in step S904), the CPU 5 performs a series of processing operations based on the lip position determination method described above. Run.

  Specifically, the CPU 5 first extracts the sensor output value that is the maximum value from the sensor output values from all the sensors 30 to 40 of the lip detection unit 3 (step S906). Then, the CPU 5 sets a value obtained by multiplying the maximum value of the extracted sensor output values by a predetermined ratio (for example, 70 to 80%) as the threshold value TH (step S908). The maximum sensor output value and the threshold value TH are stored in a predetermined storage area of the RAM 7.

  Next, the CPU 5 sets the sensor output value straddling the above-mentioned threshold value TH as a target range from the position of the sensor where the sensor output value becomes the maximum value to the sensor range located on the back side (heel side) of the mouthpiece 10. Two sensors are extracted and the process of acquiring their position numbers is executed (step S910). The CPU 5 determines whether or not two sensors whose sensor output values cross the threshold value TH are extracted (found) in the process of step S910 (step S912). Here, in step S912, the position number PL of the sensor on the mouth opening side (tip side) of the mouthpiece 10 among the two adjacent sensors to be extracted can take a position in the range of 1 to 9. become. Therefore, in step S912, the CPU 5 also determines whether or not the extracted tip side sensor position number PL is within the above range.

  If two corresponding sensors are extracted in step S912 (Yes in step S912), the lip position PS (Rear) is calculated based on the above-described equation (16) (step S914). The calculated lip position PS (Rear) is stored in a predetermined storage area of the RAM 7. Thereafter, the CPU 5 ends the processing of the lip detection unit 3 and returns to the processing of the main routine shown in FIG.

  On the other hand, when two corresponding sensors are not extracted in step S912 (No in step S912), the CPU 5 notifies the player of an error or a warning (step S916). In addition, when the CPU 5 determines in step S912 that the extracted tip side sensor position number PL is 0 or 10 and deviates from the range of 1 to 9, the CPU 5 also determines in step S916. Perform error and warning actions. Here, the method of notifying the performer of error information or warning is not particularly limited, but for example, an error message or warning sound may be output from the sound system 9. As another example, when the electronic musical instrument 100 has a light emitting unit or a display unit (not shown), the electronic musical instrument 100 vibrates depending on the light emission pattern or display contents in the light emitting unit or the display unit. In the case of having a part (vibrator), error information and warning may be notified by a vibration pattern in the vibration part. Thereafter, the CPU 5 ends the processing of the lip detection unit 3 and returns to the processing of the main routine shown in FIG.

  As described above, in the present embodiment, the maximum value is obtained based on the distribution of sensor output values obtained from the plurality of sensors 30 to 39 arranged in the lead portion 11 with the mouthpiece 10 of the electronic musical instrument 100 held. Focusing on the sensor output value on the back side (heel side) from the sensor position of the sensor output value of max (1-10), the position where the value begins to drop characteristically is specified and determined as the lip position.

  Thus, according to the present embodiment, when the player performs the performance while holding the mouthpiece of the electronic musical instrument, the lip position is more accurate without being affected by changes in the humidity and temperature in the oral cavity. Can be determined, and can be made closer to a wind feeling or a musical sound effect (for example, pitch bend, vibrato, etc.) in an acoustic wind instrument.

(Modification)
Next, a modified example of the electronic musical instrument control method according to the above-described embodiment will be described. Here, since the external appearance and functional configuration of the electronic musical instrument to which the present modification is applied are the same as those of the above-described embodiment, the description thereof is omitted.

FIG. 10 is a flowchart showing a modification of the control method of the electronic musical instrument according to the present embodiment.
The control method of the electronic musical instrument according to the present modification is applied to the processing (step S804) of the lip detection unit of the main routine shown in the flowchart of FIG. It has a feature in the setting method. In the flowchart shown in FIG. 10, steps S1002 to S1014 are equivalent to S902 to S914 in the flowchart shown in FIG.

  In this modified example, first, the CPU 5 detects the sensor output that becomes the maximum value from the sensor output values from all the sensors 30 to 40 of the lip detection unit 3 arranged in the lead unit 11 as in the above-described embodiment. A value is extracted (step S1006), and a value obtained by multiplying the maximum value by a predetermined ratio is set as the threshold value TH (step S1008). Here, in this modification, for example, 80% (80%) is set as the initial value of the predetermined ratio.

  Next, the CPU 5 sets two adjacent sensors whose sensor output values cross the threshold value TH with the sensor disposed on the back side (heel side) of the mouthpiece 10 from the sensor position where the sensor output value becomes the maximum value. In the process of extracting sensors (step S1010), it is determined whether or not two corresponding sensors have been extracted (step S1012). If two sensors straddling the threshold value TH are not extracted (No in step S1012), the CPU 5 changes the above ratio for setting the threshold value TH from 80% (80%) of the initial value to 70%, for example. The threshold value TH is reset by changing the value to (70%) (step S1016). Here, the CPU 5 determines whether the changed ratio (for example, 70%) or the reset threshold value TH is smaller than a preset limit value (step S1018).

  Specifically, when the changed ratio is less than 40% (40%), for example, or when the reset threshold TH is less than 40% (40%) of the maximum value (Yes in step S1018). ), The CPU 5 notifies the performer of errors and warnings in the same manner as in step S916 shown in the above-described embodiment (step S1020).

  On the other hand, when the changed ratio is, for example, 40% (40%) or more, or when the reset threshold TH is, for example, 40% (40%) or more of the maximum value (No in step S1018). The CPU 5 returns to step S1010 and executes a process of extracting two adjacent sensors that cross the threshold value TH in which the sensor output value is reset.

  Such a series of processing operations of steps S1010, S1012, S1016, and S1018 is for setting the threshold value TH (or threshold value TH) until two sensors whose sensor output values cross the threshold value TH are extracted in step S1012. Is executed repeatedly.

  Here, the above-mentioned ratio for setting the threshold value TH is set to 80%, for example, as in the above-described embodiment, and 70%, 60%, 50%,... Each time the threshold value TH is reset.・ Decrease by 10% and continue until it becomes less than 40%. The method for changing the threshold value TH is not limited to that shown in the present modification, and may be set only once, or may be set multiple times at finer intervals. There may be.

  In such an electronic musical instrument control method, the threshold TH is set so as to decrease sequentially, and a process for determining a lip position (a process for extracting the position of a sensor having two sensor output values across the threshold) Is repeatedly executed. This makes it possible to handle a wider range of situations even when there is a difference in the contact state of the lip or tongue when holding the mouthpiece or during performance, or a difference in the moisture or temperature in the mouth. More accurate lip position.

  In the embodiment described above, in the distribution of sensor output values from the sensors of the lip detector 3, the mouthpiece 10 is disposed on the back side (heel side) of the sensor position where the sensor output value is the maximum value. A method has been described in which the sensor output value is determined as a lip position by specifying the position where the sensor output value begins to drop characteristically. Based on the same technical idea, the present invention is directed to a sensor disposed on the mouth opening side (tip side) of the mouthpiece 10 with respect to the sensor position where the sensor output value is the maximum value. It may be determined as a lip position indicating the end (inner edge portion) of the lip (lower lip) LP on the inside of the oral cavity by specifying the position where it begins to rise characteristically. In this case, as described in the above-described embodiment, the sensor output value from the sensor arranged in the lead portion 11 located in the oral cavity varies due to the influence of the tongueing, the moisture in the oral cavity, and the temperature change. . For this reason, when the method for determining the lip position indicating the inner edge portion of the lip LP is applied to the mouthpiece of the above-described saxophone type electronic musical instrument, the accurate lip position may not be determined. However, for example, an electronic musical instrument with a performance technique that does not perform toning can be applied satisfactorily. In addition, as for the influence on the sensor output value due to the moisture and temperature in the oral cavity, for example, the temperature change of the mouthpiece 10 can be detected using the sensor output value from the sensor 40, so the temperature to the sensor output value By performing the offset process so as to cancel the influence of the lip position, the lip position can be determined relatively accurately.

  In the above-described embodiment, the electronic musical instrument 100 having a saxophone-type appearance is shown and described. However, the electronic musical instrument according to the present invention is not limited to this. In other words, if an electronic musical instrument (electronic wind instrument) expresses a performance similar to that of an acoustic wind instrument using a reed, the player can apply it to an electronic musical instrument (electronic wind instrument) that imitates another acoustic wind instrument such as clarinet. You may do.

  Further, in the electronic wind instrument, in addition to operating a plurality of performance operators using a plurality of fingers, for example, a touch sensor is provided at the position of the thumb, and this occurs according to the position of the thumb detected by the touch sensor. Some are designed to control musical effects. By applying the detection device and the detection method according to the present invention to such an electronic wind instrument, a plurality of sensors for detecting the contact and proximity of the finger are arranged at a position operable with one finger, The operation position by one finger may be detected based on a plurality of detection values detected by the plurality of sensors.

  Further, not only electronic musical instruments, but also electronic devices in which an operator performs an operation using a part of the body, the detection device and the detection method for detecting an operation position according to the present invention are applied, A plurality of sensors that detect contact and proximity of a part of the body are provided at a position where the part can be operated, and an operation position by a part of the body is detected based on a plurality of detection values detected by the plurality of sensors. You may make it do.

  Further, in the above-described embodiment, the configuration in which the plurality of sensors 20 and 30 to 40 physically separated are arranged in the lead portion 11 of the mouthpiece 10 is shown, but these sensors are physically separated. It is not necessary to use a plurality of sensors. That is, a function equivalent to that of the plurality of sensors 20 and 30 to 40 described above is realized by electrically dividing a detection region of one sensor provided along the longitudinal direction of the lead substrate 11a into a plurality of portions. It is also possible to realize functions equivalent to those of the plurality of sensors 20 and 30 to 40 described above by reading detection values from a plurality of areas of one sensor by software in a time division manner. Good.

As mentioned above, although several embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It includes the invention described in the claim, and its equivalent range.
Hereinafter, the invention described in the scope of claims of the present application will be appended.

(Appendix)
[1]
A plurality of sensors arranged at intervals determined in a specific direction;
A control unit that determines an operation position in the specific direction based on output values of the plurality of sensors,
The controller is
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. A detection device characterized by that.

[2]
The mouthpiece that the performer sings in the mouth,
The plurality of sensors are arranged from one end side to the other end side of the lead portion of the mouthpiece, each detecting a contact state of the lips,
The controller is
The operation position, which is the position of the lips within a range from one end side to the other end side of the lead portion, is determined based on an array position of the sensors having the output value closer to the threshold value. The detection device according to [1].

[3]
The control unit determines the operation position in the specific direction based on an array position of the plurality of sensors that have the output value closer to the threshold value and are arranged adjacent to each other. The detection device according to [1] or [2], which is characterized.

[4]
The said control part determines the said operation position based on the arrangement position of the said some sensor which has the said output value over the said threshold value, The detection apparatus as described in [3] characterized by the above-mentioned.

[5]
In the range of the array position of the two sensors, the control unit is specified in correspondence with the ratio of the threshold value in the range of the output value of the two sensors having the output value across the threshold value. The detection apparatus according to [4], wherein a position is determined as the operation position.

[6]
The threshold value is set to a predetermined value or a value lower by a predetermined ratio than the output value that is the maximum value of the plurality of sensors, according to any one of [1] to [5] Detection device.

[7]
The detection device according to any one of [1] to [6];
A sound source for generating musical sounds,
The controller is
An electronic musical instrument that controls a musical sound to be generated by the sound source based on the determined operation position.

[8]
The electronic musical instrument according to [7], wherein the plurality of sensors detect a part of a player's body.

[9]
The electronic musical instrument is an electronic wind instrument having a mouthpiece,
The electronic musical instrument according to [8], wherein the plurality of sensors are arranged in a lead portion of the mouthpiece to detect a player's lips.

[10]
A lead portion in which a plurality of sensors that detect the contact state of the lips from one end side to the other end side are arranged;
A control unit that determines a contact position of the lips on the lead unit based on output values of the plurality of sensors,
The controller is
The sensor having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors is extracted, and based on the extracted array position of the sensors, the lips Determine the contact position of
An electronic musical instrument that controls generation of musical sounds based on the determined lip contact position.

[11]
The electronic musical instrument according to [10], wherein the threshold is set to a value in a range of 70% to 80% of the output value that is the maximum value of the plurality of sensors.

[12]
[10] or [11], wherein the control unit preferentially extracts the sensor having the output value closer to the threshold value from the sensors arranged on the other end side of the lead unit. ] The electronic musical instrument as described in.

[13]
When the control unit determines the contact position of the lips based on the arrangement position of the sensors arranged on the other end side of the lead unit, the control unit moves to the one end side of the lead unit by the thickness of the lip. The electronic musical instrument according to [12], wherein the contact position is corrected.

[14]
When the control unit cannot extract the sensor having the output value closer to the threshold value, the control unit again extracts the sensor having the output value closer to the threshold value changed to a lower value. The electronic musical instrument according to any one of [10] to [13].

[15]
Electronics
Obtain the output values of multiple sensors arranged at intervals determined in a specific direction,
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. ,
A detection method characterized by the above.

[16]
On the computer,
Each of the output values of a plurality of sensors arranged at intervals determined in a specific direction is acquired,
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. ,
A control program characterized by that.

3 Lip detection unit 4 Tan detection unit 5 CPU (control unit)
DESCRIPTION OF SYMBOLS 10 Mouthpiece 11 Lead part 11a Lead board 20, 30-40 Sensor 100 Electronic musical instrument LP Lip (lower lip)
TN1, TN2 tongue (tongue)
PS0 to PS11 Sensor position PS (Rear) Lip position
max (1-10) Maximum value TH threshold

Claims (16)

A plurality of sensors arranged at intervals determined in a specific direction;
A control unit that determines an operation position in the specific direction based on output values of the plurality of sensors,
The controller is
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. A detection device characterized by that. The mouthpiece that the performer sings in the mouth,
The plurality of sensors are arranged from one end side to the other end side of the lead portion of the mouthpiece, each detecting a contact state of the lips,
The controller is
The operation position, which is the position of the lips within a range from one end side to the other end side of the lead portion, is determined based on an array position of the sensors having the output value closer to the threshold value. The detection device according to claim 1.   The control unit determines the operation position in the specific direction based on an array position of the plurality of sensors that have the output value closer to the threshold value and are arranged adjacent to each other. The detection device according to claim 1 or 2, characterized in that   The detection device according to claim 3, wherein the control unit determines the operation position based on an array position of the plurality of sensors having the output value across the threshold value.   In the range of the array position of the two sensors, the control unit is specified in correspondence with the ratio of the threshold value in the range of the output value of the two sensors having the output value across the threshold value. The detection apparatus according to claim 4, wherein a position is determined as the operation position.   6. The detection apparatus according to claim 1, wherein the threshold value is set to a predetermined value or a value lower by a predetermined ratio than the output value that is the maximum value of the plurality of sensors. . The detection device according to any one of claims 1 to 6,
A sound source for generating musical sounds,
The controller is
An electronic musical instrument that controls a musical sound to be generated by the sound source based on the determined operation position.   The electronic musical instrument according to claim 7, wherein the plurality of sensors detect a part of a player's body. The electronic musical instrument is an electronic wind instrument having a mouthpiece,
The electronic musical instrument according to claim 8, wherein the plurality of sensors are arranged in a lead portion of the mouthpiece to detect a player's lips. A lead portion in which a plurality of sensors that detect the contact state of the lips from one end side to the other end side are arranged;
A control unit that determines a contact position of the lips on the lead unit based on output values of the plurality of sensors,
The controller is
The sensor having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors is extracted, and based on the extracted array position of the sensors, the lips Determine the contact position of
An electronic musical instrument that controls generation of musical sounds based on the determined lip contact position.   The electronic musical instrument according to claim 10, wherein the threshold value is set to a value in a range of 70% to 80% of the output value that is the maximum value of the plurality of sensors.   The said control part preferentially extracts the said sensor which has the said output value close | similar to the said threshold value from the said sensor arranged in the other end side of the said lead part, The Claim 10 or 11 characterized by the above-mentioned. The electronic musical instrument described.   When the control unit determines the contact position of the lips based on the arrangement position of the sensors arranged on the other end side of the lead unit, the control unit moves to the one end side of the lead unit by the thickness of the lip. The electronic musical instrument according to claim 12, wherein the contact position is corrected.   When the control unit cannot extract the sensor having the output value closer to the threshold value, the control unit again extracts the sensor having the output value closer to the threshold value changed to a lower value. The electronic musical instrument according to claim 10, wherein Electronics
Obtain the output values of multiple sensors arranged at intervals determined in a specific direction,
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. ,
A detection method characterized by the above. On the computer,
Each of the output values of a plurality of sensors arranged at intervals determined in a specific direction is acquired,
The operation position in the specific direction is determined based on the arrangement position of the sensors having the output value closer to the threshold value set between the maximum value and the minimum value of the output values of the plurality of sensors. ,
A control program characterized by that.

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