JP2022046211A - Electronic musical instrument, and control method and program for electronic musical instrument - Google Patents

Abstract

To provide an electronic musical instrument, and a control method and program for the electronic musical instrument that can reduce a possibility that a musical sound different from a musical sound that a player desires to output is output.SOLUTION: An electronic musical instrument 1 comprises a lip position calculation part 107 and a lip position correction part 108, and the lip position calculation part 107 has a contact position of the lower lip of a player, touching a lead part that the player touches, arrayed on the lead part in a reference direction, and calculates a lip position based upon output values of a plurality of sensors detecting contact by the player. The lip position calculation part 108 corrects a lip position calculated by the lip position calculation part 107 using the correction value according to the calculated lip position.SELECTED DRAWING: Figure 6

Description

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

There is known an electronic musical instrument that outputs a musical sound according to the contact position of a part of the body when a part of the body of the performer comes into contact with the contact operation means for accepting the contact operation by the performer. For example, Patent Document 1 includes a mouthpiece in which a performer holds a mouth and breathes, and detects a contact position of the lips when the performer's lips come into contact with a lead portion provided on the mouthpiece. It discloses an electronic musical instrument that outputs a musical sound according to the detected contact position of the lips.

Japanese Unexamined Patent Publication No. 2019-20504

The lead portion of the electronic musical instrument described in Patent Document 1 includes a tip side end portion which is an end portion on the breath inlet side provided on the mouthpiece, and a heel which is an end portion opposite to the tip side end portion. It has a side end and. The electronic musical instrument described in Patent Document 1 has a position different from the actual contact position of the lips when the performer plays with the lips in contact with the position near the heel side end portion on the lead portion. In some cases, it was erroneously detected as the contact position of the lips. Further, in the electronic musical instrument described in Patent Document 1, when the performer plays while slightly changing the contact position of the lips in a state where the lips are in contact with the position near the tip side end portion on the lead portion. In some cases, it was not possible to detect minute movements of the contact position of the lips to be detected. In such a case, the electronic musical instrument described in Patent Document 1 outputs a musical sound different from the musical sound desired by the performer by outputting the musical sound according to the contact position of the lips that has been erroneously detected. There was a risk.

The present invention has been made in view of the above circumstances, and provides an electronic musical instrument, a control method and a program for the electronic musical instrument, which can reduce the possibility that a musical instrument different from the musical sound desired by the performer is output. The purpose is.

In order to achieve the above object, the electronic musical instrument according to the present invention is
The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. Contact position calculation means calculated based on
A contact position correction means that corrects the contact position calculated by the contact position calculation means by using a correction value corresponding to the calculated contact position.
To prepare
It is characterized by that.

According to the present invention, it is possible to reduce the possibility that a musical tone different from the musical tone desired by the performer is output.

It is a front view of the electronic musical instrument which concerns on embodiment of this invention. It is a side view of the electronic musical instrument which concerns on embodiment of this invention. It is a figure which shows the electric structure of the electronic musical instrument which concerns on embodiment of this invention. It is sectional drawing of the mouthpiece which concerns on embodiment of this invention. It is a figure which shows the lead part which concerns on embodiment of this invention. It is a figure which shows the functional structure of the electronic musical instrument which concerns on embodiment of this invention. It is a figure for demonstrating the correspondence relationship between the lip position and the coefficient which concerns on embodiment of this invention. (A) is a figure which shows an example of the output value of a sensor. (B) is a diagram showing an example of the correspondence between the sensor, the value indicating the position of the sensor, and the output value of the sensor reduced according to the temperature drift correction value. (C) is a diagram showing an example of the correspondence between the sensor, the value indicating the position of the sensor, and the output value of the sensor reduced according to the temperature drift correction value corresponding to the lip position. It is a flowchart for demonstrating the musical sound sounding process performed by the electronic musical instrument which concerns on embodiment of this invention. It is a flowchart for demonstrating the lip detection process performed by the electronic musical instrument which concerns on embodiment of this invention. It is a rear view of the electronic musical instrument which concerns on the modification of this invention. It is a figure which shows the touch pad which concerns on the modification of this invention.

Hereinafter, the electronic musical instrument according to the embodiment of the present invention will be described with reference to the drawings. In the figure, configurations that are the same as or equivalent to each other are designated by the same reference numerals.

As shown in FIGS. 1 and 2, the electronic musical instrument 1 according to the embodiment of the present invention has a shape imitating the shape of a saxophone which is an acoustic wind instrument. The electronic musical instrument 1 has a tubular housing, a tube body portion 2 held by the performer by hand, an operator 3 provided on the surface of the tube body portion 2 and operated by the performer with a finger, and a tube body portion. It is provided with a mouthpiece 4 provided at one end of the second and a player holds his / her mouth to breathe, and a sound system 5 provided at the other end of the tube portion 2 to produce a musical sound. The performer is a user who plays using the electronic musical instrument 1.

The controller 3 includes a plurality of keys that accept operations by the performer using fingers, detects operations on the plurality of keys by the performer, and provides key / switch information indicating the detection result to a CPU (Central Processing Unit) described later. ) Output to 8. The plurality of keys included in the operator 3 include a performance key that accepts the designation of the pitch of the musical tone by the performer, and a setting key that accepts the setting operation by the performer. The setting keys include a power key that accepts a setting operation for switching the power of the electronic musical instrument 1 on and off, and a pitch adjustment key that accepts a setting operation that changes the pitch of a musical tone according to a music key. ing. The playing key is provided on the front surface of the tube 2, and the setting key is provided on the back surface of the tube 2 facing the front surface of the tube 2. As shown in FIG. 2, on the back surface of the tubular portion 2, a finger rest 20 that comes into contact with the performer's finger and assists the performer to stably hold the electronic musical instrument 1 and an electronic musical instrument. A strap ring 21 through which a strap (not shown) for suspending 1 from the performer's neck is provided.

As shown in FIG. 3, in addition to the above-described configuration, the electronic musical instrument 1 includes a breath pressure detection unit 6, a contact detection unit 7, a CPU 8, a ROM (Read Only Memory) 9, and a RAM (Random Access Memory). A 10 and a sound source 11 are provided. The operator 3, the breath pressure detection unit 6, the contact detection unit 7, the CPU 8, the ROM 9, the RAM 10, and the sound source 11 are connected to each other via the system bus 12, which is a transmission path for commands and data. The CPU 8, ROM 9, RAM 10, and sound source 11 are built in the tube body 2. Note that FIG. 3 shows only the configuration related to the feature portion of the present invention among the configurations included in the electronic musical instrument 1. The electronic musical instrument 1 may have any configuration not shown in FIG. For example, the electronic musical instrument 1 may include a display unit for displaying various images.

The breath pressure detection unit 6 detects the breath pressure blown into the mouthpiece 4 by the performer, and outputs the breath pressure information indicating the detection result to the CPU 8. The contact detection unit 7 includes a plurality of capacitive touch sensors for detecting contact by the performer, detects the contact of the player's lower lip with the lead unit 41 included in the mouthpiece 4 described later, and detects the detection result. The indicated lip detection information is output to the CPU 8. Further, the contact detection unit 7 detects the contact of the performer's tongue with the lead unit 41, and outputs the tongue detection information indicating the detection result to the CPU 8. When the performer performs tonguing, which is a playing operation of stopping the vibration of the lead portion 41 by bringing the tongue into contact with the lead portion 41 during performance, the contact of the tongue with the lead portion 41 is detected by the contact detection unit 7. Tonguing. The details of the contact detection of the performer's lower lip and tongue by the contact detection unit 7 will be described later. The CPU 8 controls each part of the electronic musical instrument 1 according to the program and data stored in the ROM 9. Further, the CPU 8 executes various processes according to the programs and data stored in the ROM 9. The ROM 9 non-temporarily stores programs and data used by the CPU 8 to execute various processes. The RAM 10 functions as a work area of the CPU 8. That is, the CPU 8 reads the programs and data stored in the ROM 9 into the RAM 10, and executes various processes by referring to the read programs and data. Further, the CPU 8 temporarily stores the data generated or acquired by executing various processes in the RAM 10, and executes various processes by referring to the stored data. The sound source 11 is a synthesizer such as a sound source LSI (Large Scale Integrated Circuit), generates a digital musical tone signal representing a musical tone under the control of the CPU 8, and outputs the generated digital musical tone signal to the sound system 5. The sound system 5 produces a musical tone corresponding to the digital musical tone signal input from the sound source 11. Specifically, the sound system 5 includes a DAC (Digital to Analog Converter), an amplifier, and a speaker, and converts the digital music signal input from the sound source 11 into an analog music signal representing the music by the DAC. Then, the analog music signal is amplified by the amplifier, and the music represented by the amplified analog music signal is produced by the speaker.

As shown in FIG. 4, the mouthpiece 4 has a main body 40 assembled to the tube body 2 of the electronic musical instrument 1, a lead portion 41 that receives a contact operation using the lower lip and tongue by the performer, and a main body 40. It is provided with a fixing bracket 42 for fixing the lead portion 41. When the performer is tonguing with the mouthpiece 4 in his mouth, the performer's lower lip and tongue come into contact with the lead portion 41. When the performer is not tonguing with the mouthpiece 4 in his mouth, the performer's lower lip touches the lead portion 41, while the performer's tongue does not touch the lead portion 41. The lead portion 41 is an example of a contact operating means. As will be described later, the electronic musical instrument 1 has a tone color corresponding to the contact operation of the lead portion 41 by the performer using the lower lip, and a volume corresponding to the contact operation of the lead portion 41 by the performer using the tongue. Outputs the musical sound that you have. One end of the lead portion 41 is fixed to the main body portion 40 by a fixing bracket 42 so as not to vibrate, while the other end of the lead portion 41 is not fixed and is configured to be vibrable. There is. In the lead portion 41, the end portion on the side not fixed by the fixing bracket 42 of the lead portion 41 and the outlet side end portion 40a of the main body portion 40 form a blow port 43 for the performer to breathe. , Is assembled to the main body 40.

A pressure sensor 60 included in the breath pressure detection unit 6 is provided at the tube body side end portion 40b of the main body portion 40 facing the blow port 43. The pressure sensor 60 detects the pressure of the performer's breath blown into the mouthpiece 43 of the mouthpiece 4. The breath pressure detection unit 6 acquires the output value of the pressure sensor 60, that is, the pressure detected by the pressure sensor 60 as the detection result of the pressure of the breath blown into the mouthpiece 4, and obtains data indicating the output value. , Is output to the CPU 8 as breath pressure information indicating the detection result.

As shown in FIGS. 4 and 5, the lead portion 41 has a plate-shaped lead substrate 44 formed of an insulating material. The lead substrate 44 has a tip side end portion 44a and a heel side end portion 44b. The tip side end portion 44a of the lead board 44 is an end portion on the side not fixed by the fixing bracket 42 of the lead portion 41. The heel side end portion 44b of the lead board 44 is the end portion on the side fixed by the fixing bracket 42 of the lead portion 41.

On the lead board 44, a plurality of sensors S0 to S12 of the contact detection unit 7 are arranged at equal intervals in the direction from the tip side end 44a of the lead board 44 toward the heel side end 44b of the lead board 44. There is. The direction from the tip side end portion 44a of the lead substrate 44 toward the heel side end portion 44b of the lead substrate 44 is an example of the reference direction. The sensors S0 to S12 are capacitive touch sensors and detect contact by the performer. Each of the sensors S0 to S12 is provided with a rectangular electrode in a plan view as a sensing pad.

Of the sensors S0 to S12 included in the contact detection unit 7, the sensors S0 to S11 function as lip sensors for detecting the contact of the performer's lower lip with the lead unit 41. That is, the contact detection unit 7 acquires the output value of the sensors S0 to S11, which is the capacitance detected by the sensors S0 to S11, as the detection result of the contact of the performer's lower lip with the lead unit 41, and the output thereof. The data indicating the value is output to the CPU 8 as lip detection information indicating the detection result. Of the sensors S0 to S12 included in the contact detection unit 7, the sensor S0 arranged at the position closest to the tip side end portion 44a of the lead substrate 44 functions as the above-mentioned lip sensor and the player's tongue with respect to the lead portion 41. It also functions as a tongue sensor that detects contact. That is, the contact detection unit 7 acquires the output value of the sensor S0, which is the capacitance detected by the sensor S0, as the detection result of the contact of the performer's tongue with the lead unit 41, and obtains data indicating the output value. , It is output to the CPU 8 as the tongue detection information indicating the detection result.

Each of the sensors S0 to S11, which is a lip sensor, is uniquely associated with any of the integers 1 to 12 as an identifier in advance. Specifically, in the sensors S0 to S11, any one of the integers from 1 to 12 is larger than the sensor arranged in the sensors S0 to S11 closer to the heel side end portion 44b of the lead substrate 44. It is associated as an identifier so that the values are associated. In other words, each of the sensors S0 to S11 corresponds to a larger value as an identifier as the sensor is arranged at a position distant from the tip side end portion 44a of the lead board 44 toward the heel side end portion 44b of the lead board 44. Identifiers are associated so that they can be attached. For example, among the sensors S0 to S11, the position closest to the heel side end 44b of the lead board 44, that is, the farthest from the tip side end 44a of the lead board 44 toward the heel side end 44b of the lead board 44. The sensor S11 arranged at the above position is associated with the largest 12 of the integers from 1 to 12 as an identifier. On the other hand, among the sensors S0 to S11, the position closest to the tip side end 44a of the lead board 44, that is, the farthest from the heel side end 44b of the lead board 44 toward the tip side end 44a of the lead board 44. The smallest 1 among the integers from 1 to 12 is associated with the sensor S0 arranged at the above position as an identifier.

When the lips and tongue of the performer are in contact with the lead portion 41, the body temperature of the performer is transmitted to the lead portion 41 and the temperature of the lead portion 41 rises, so that the temperature of the lead portion 41 rises on the lead substrate 44 of the lead portion 41. It is called temperature drift in which the output value of all the sensors S0 to S12, which are the placed capacitive touch sensors, including the sensor placed at the position where the performer's lips or tongue do not touch, increases. The phenomenon occurs. As will be described later, the electronic musical instrument 1 calculates the lip position, which is the contact position of the lower lip of the performer on the lead portion 41, based on the output values of the sensors S0 to S11, which are the lip sensors. However, when the lip position is calculated based on the output values of the sensors S0 to S11 increased due to the influence of the temperature drift, a position different from the actual contact position of the lower lip of the performer is erroneously calculated as the lip position. There is a risk. In view of such circumstances, the electronic musical instrument 1 detects the influence of temperature drift, that is, the amount of increase in the output values of the sensors S0 to S11 due to the temperature drift, by using the contact detection unit 7, as described later. A process of removing the influence of the detected temperature drift from the output values of the sensors S0 to S11 is performed, and the lip position is calculated based on the output value after the process, thereby improving the detection accuracy of the lip position.

Of the sensors S0 to S12 included in the contact detection unit 7, the position closest to the heel side end 44b of the lead board 44, that is, the direction from the tip side end 44a of the lead board 44 toward the heel side end 44b of the lead board 44. The sensor S12 provided at the farthest position is covered with a cover (not shown) so as not to come into contact with the performer's body, and functions as a temperature drift sensor for detecting the influence of temperature drift. That is, the contact detection unit 7 acquires the output value of the sensor S12, which is the capacitance detected by the sensor S12, as the detection result of the influence of the temperature drift, and the data indicating the output value indicates the detection result. It is output to the CPU 8 as temperature drift information. The sensor S12 is an example of a reference sensor. Although the sensor S12 is shown in FIGS. 4 and 5 in a state where the sensor S12 is not covered with the cover for easy understanding, the sensor S12 is actually covered with the cover. On the other hand, the sensors S0 to S11 are not covered with a cover, and are configured so that the performer's body can come into contact with them.

In the present embodiment, the sensors S0 to S12 will be described as being capacitive touch sensors, but this is only an example, and the sensors S0 to S12 are arbitrary sensors capable of detecting contact by the performer. It may be a sensor. For example, the sensors S0 to S12 may be resistance film type touch sensors. Alternatively, the sensors S0 to S12 may be pressure sensors. Further, in the present embodiment, the electrodes included in the sensors S0 to S12 will be described as having a rectangular shape in a plan view, but this is only an example, and the shape of the electrodes may be any shape. For example, the electrodes included in the sensors S0 to S12 may have a V-shaped plan view or a waveform shape in a plan view. Further, in the present embodiment, it is assumed that 13 sensors S0 to S12 are arranged on the lead substrate 44, but this is only an example, and the number of sensors is arbitrary. good. Further, in the present embodiment, the sensor S12, which is a temperature drift sensor, is described as being configured so as not to come into contact with the performer's body by being covered with a cover, but this is only an example, and the sensor S12 is used. , It may be configured so that the performer's body does not come into contact with the performer in any form. For example, the sensor S12 may be configured so as not to come into contact with the performer's body by being arranged at a position on the lead substrate 44 where the performer's body does not come into contact.

Functionally, as shown in FIG. 6, the electronic musical instrument 1 having the above-mentioned physical configuration has a key / switch information acquisition unit 100, a breath pressure information acquisition unit 101, a tongue detection information acquisition unit 102, and a lip detection. Information acquisition unit 103, temperature drift information acquisition unit 104, pitch determination unit 105, volume determination unit 106, lip position calculation unit 107, lip position correction unit 108, tone color determination unit 109, and musical sound output unit. It is equipped with 110. The key / switch information acquisition unit 100 to the musical tone output unit 110 are realized by the CPU 8. That is, the CPU 8 functions as the key / switch information acquisition unit 100 to the musical sound output unit 110 by executing the program stored in the ROM 9 to control the electronic musical instrument 1. Note that FIG. 6 shows only the functional configuration related to the feature portion of the present invention among the functional configurations included in the electronic musical instrument 1. The electronic musical instrument 1 may have any functional configuration not shown in FIG. For example, the electronic musical instrument 1 may include a display control unit that controls the display of an image by the display unit described above.

The key / switch information acquisition unit 100 acquires key / switch information indicating an operation detection result for a plurality of keys included in the operator 3 including a performance key and a setting key from the operator 3. The breath pressure information acquisition unit 101 acquires data indicating the output value of the pressure sensor 60 as the breath pressure information indicating the detection result of the breath pressure of the performer blown into the mouthpiece 4 from the breath pressure detection unit 6. .. The tongue detection information acquisition unit 102 acquires data indicating the output value of the sensor S0, which is a tongue sensor, as tongue detection information indicating the detection result of the contact of the performer's tongue with the lead unit 41 from the contact detection unit 7. The lip detection information acquisition unit 103 receives data indicating the output values of the sensors S0 to S11, which are lip sensors, as lip detection information indicating the detection result of the contact of the player's lower lip with the lead unit 41 from the contact detection unit 7. get. The temperature drift information acquisition unit 104 acquires data indicating the output value of the sensor S12, which is a temperature drift sensor, as the temperature drift information indicating the detection result of the influence of the temperature drift from the contact detection unit 7.

The pitch determination unit 105 determines the pitch of the musical tone according to the key / switch information acquired by the key / switch information acquisition unit 100. The volume determination unit 106 determines the volume of the musical tone according to the breath pressure information acquired by the breath pressure information acquisition unit 101 and the tongue detection information acquired by the tongue detection information acquisition unit 102. In this embodiment, the volume of the musical tone is determined according to the tonguing detection information acquired by the tonguing detection information acquisition unit 102, but this is only an example, and the CPU 8 indicates the tonguing detection information. The tonguing execution state may be determined based on the output value of the sensor S0, which is a tonguing sensor, and the note-on and note-off of the musical tone may be controlled according to the result of the determination. The lip position calculation unit 107 of the performer who has come into contact with the lead unit 41 based on the lip detection information acquired by the lip detection information acquisition unit 103 and the temperature drift information acquired by the temperature drift information acquisition unit 104. The lip position, which is the contact position of the lower lip, is calculated. The lip position is an example of the contact position of a part of the performer's body. The lip position calculation unit 107 is an example of the contact position calculation means. The lip position correction unit 108 corrects the lip position calculated by the lip position calculation unit 107 by using the correction value corresponding to the calculated lip position. The lip position correction unit 108 is an example of the contact position correction means. Details of the calculation of the lip position by the lip position calculation unit 107 and the correction of the lip position by the lip position correction unit 108 will be described later. The timbre determination unit 109 determines the timbre of the musical tone according to the lip position after being corrected by the lip position correction unit 108.

The musical tone output unit 110 outputs a musical tone having a pitch determined by the pitch determination unit 105, a volume determined by the volume determination unit 106, and a tone color determined by the tone color determination unit 109. Specifically, the musical tone output unit 110 controls the sound source 11 to generate a digital musical tone signal representing a musical tone having the above-mentioned pitch, volume, and timbre, and outputs the digital musical tone signal to the sound system 5. The sound system 5 is controlled to produce a musical tone represented by the digital musical tone signal input from the sound source 11. As described above, the timbre determination unit 109 determines the timbre of the musical tone according to the lip position after being corrected by the lip position correction unit 108. That is, the musical tone output unit 110 outputs a musical tone having a tone color determined by the tone color determination unit 109, thereby outputting a musical tone corresponding to the lip position corrected by the lip position correction unit 108.

With such a configuration, the electronic musical instrument 1 has a pitch corresponding to an operation by the performer with respect to the controller 3, a performance operation by the performer to breathe into the mouthpiece 4, and a lead portion by the performer. A musical instrument having a volume corresponding to a contact operation using the tongue with respect to 41 and a tone color corresponding to a contact operation using the lower lip with respect to the lead portion 41 by the performer is output.

In the present embodiment, the electronic musical instrument 1 will be described as determining the timbre of the musical sound according to the lip position, but this is only an example. The electronic musical instrument 1 may determine the volume of the musical sound according to the lip position. Alternatively, the electronic musical instrument 1 may determine the pitch of the musical tone according to the lip position. Alternatively, the electronic musical instrument 1 may determine a plurality of elements among the tone color of the musical tone, the pitch of the musical tone, and the volume of the musical tone, depending on the lip position. Further, the electronic musical instrument 1 may be configured to accept an operation by a performer who sets which of the tone color of the musical tone, the pitch of the musical tone, and the volume of the musical tone is determined according to the lip position. For example, the setting key provided in the controller 3 includes a selection key that accepts an operation by the performer to set which of the musical tone tone, the musical tone pitch, and the musical tone volume is determined according to the lip position. The electronic musical instrument 1 selects which of the musical tone tone, the musical tone pitch, and the musical tone volume is determined according to the lip position according to the detection result of the operation for the selection key. It may be configured.

In the present embodiment, the musical tone output unit 110 will be described as outputting the musical tone by causing the sound system 5 to pronounce the musical tone, but this is only an example, and the musical tone output unit 110 can be used by any method. Musical sounds can be output. For example, the musical tone output unit 110 controls the sound source 11 to generate a digital musical tone signal representing the musical tone, and outputs the digital musical tone signal to external information such as a PC (Personal Computer) or a smartphone via an output port (not shown). The musical tone may be output by outputting to the processing device.

Hereinafter, the details of the calculation of the lip position by the lip position calculation unit 107 will be described. The lip position calculation unit 107 calculates the lip position based on the output values of the sensors S0 to S11, which are the lip sensors indicated by the lip detection information acquired by the lip detection information acquisition unit 103. However, as described above, since the output values of the sensors S0 to S11 include an increase in the output value due to the temperature drift, when the lip position is calculated based on the output values of the sensors S0 to S11. , There is a risk of calculating the wrong lip position. In view of such circumstances, the lip position calculation unit 107 receives the temperature drift from the output values of the sensors S0 to S11 according to the detection result of the influence of the temperature drift indicated by the temperature drift information acquired by the temperature drift information acquisition unit 104. The lip position detection accuracy is improved by performing a process of removing the influence of the above process and calculating the lip position based on the output values of the sensors S0 to S11 after the process.

Specifically, the lip position calculation unit 107 considers the output value of the sensor S12 indicated by the temperature drift information as the amount of increase in the output value of the sensor due to the temperature drift, and calculates the output value from the output values of the sensors S0 to S11. Obtained as a temperature drift correction value, which is a correction value for removing the influence of temperature drift. Then, the lip position calculation unit 107 sets the output values of the sensors S0 to S11 according to the acquired temperature drift correction value in order to remove the influence of the temperature drift from the output values of the sensors S0 to S11 indicated by the lip detection information. To reduce. That is, the lip position calculation unit 107 subtracts the temperature drift correction value from the output values of the sensors S0 to S11, and when the subtracted output value is 0 or more, the subtracted output value is used as the reduced output value. If the output value after subtraction is smaller than 0, 0 is acquired as the output value after subtraction. The value after the decimal point of the sensor output value after subtracting the temperature drift correction value is rounded down. Note that this is only an example, and the output value of the sensor after subtracting the temperature drift correction value may be rounded up to the nearest whole number.

The lip position calculation unit 107 reduces the output value of the sensors S0 to S11 indicated by the lip detection information according to the output value of the sensor S12 acquired as the temperature drift correction value, thereby causing the temperature drift from the output values of the sensors S0 to S11. After removing the influence of, the lip position is calculated based on the output values of the sensors S0 to S11 after the decrease. Specifically, the sensors S0 to S11 are associated with a value indicating the position of each sensor in advance, and the lip position calculation unit 107 is a value indicating the position of the sensors S0 to S11 according to the following equation (1). Is weighted and averaged using the output value of each sensor after decreasing according to the temperature drift correction value as a weight to calculate the lip position. In the formula (1), Xg represents a lip position, and Xi represents a value indicating the position of the sensor to which the number i is associated as the above-mentioned identifier among the sensors S0 to S11. Further, in the equation (1), Mi represents the output value of the sensor to which the number i is associated as an identifier among the sensors S0 to S11, which is reduced according to the temperature drift correction value, and N is the electronic musical instrument 1. Represents the number of lip sensors provided in. As described above, since the electronic musical instrument 1 includes twelve sensors S0 to S11 as lip sensors, N is 12.

Any of the integers from 0 to 11 is uniquely associated with the sensors S0 to S11 in advance as a value indicating a position. Specifically, in the sensors S0 to S11, any of the integers from 0 to 11 is larger than the sensor arranged in the sensors S0 to S11 closer to the heel side end portion 44b of the lead substrate 44. Just as the values are associated, they are associated as position-indicating values. In other words, each of the sensors S0 to S11 has a larger value as the sensor is arranged at a position distant from the tip side end portion 44a of the lead board 44 toward the heel side end portion 44b of the lead board 44. A value indicating the position is associated so that it can be associated as a value. For example, among the sensors S0 to S11, the position closest to the heel side end 44b of the lead board 44, that is, the farthest from the tip side end 44a of the lead board 44 toward the heel side end 44b of the lead board 44. The sensor S11 arranged at the above position is associated with the largest integer 11 from 0 to 11 as a value indicating the position. On the other hand, among the sensors S0 to S11, the position closest to the tip side end 44a of the lead board 44, that is, the farthest away from the heel side end 44b of the lead board 44 toward the tip side end 44a of the lead board 44. The sensor S0 arranged at the above position is associated with the smallest 0 among the integers from 0 to 11 as a value indicating the position.

The lip position calculation unit 107 outputs an output of each sensor after reducing an integer from 0 to 11, which is a value indicating the position of the sensors S0 to S11, according to the temperature drift correction value according to the above equation (1). By weighted averaging using the value as a weight, the value belonging to the range of 0 or more and 11 or less is calculated as the lip position. In the present embodiment, the sensors S0 to S11 will be described as having an integer from 0 to 11 as a value indicating the position of each sensor, but this is only an example, and the sensors S0 to S11 are associated with each other. Can be associated with any value as a value indicating the position of each sensor. For example, the distance from the tip side end 44a of the lead substrate 44 to each sensor may be associated with the sensors S0 to S11 in advance as a value indicating the position of each sensor.

As described above, the lip position calculation unit 107 determines the lip position based on the output values of the sensors S0 to S11 after the process of removing the influence of the temperature drift is performed in order to improve the detection accuracy of the lip position. It is calculated. However, in spite of the above-mentioned processing, when the lower lip of the performer is in contact with the position near the heel side end portion 44b of the lead substrate 44, or the lower lip of the performer is in contact with the lead substrate 44. If the contact position of the lower lip is slightly changed in the state of being in contact with the position near the tip side end portion 44a, the lip position calculation unit 107 may calculate an erroneous lip position.

Specifically, when the lower lip of the performer is in contact with a position near the heel side end portion 44b of the lead substrate 44, that is, a position near the sensor S12 which is a temperature drift sensor, the output value of the sensor S12. May include an increase in the sensor output due to the contact of the performer's lower lip, as well as an increase in the sensor output due to the effect of temperature drift. In such a case, the lip position calculation unit 107 regards the output value of the sensor S12 as the amount of increase in the output value of the sensor due to the temperature drift and acquires it as the temperature drift correction value, and obtains it as the temperature drift correction value according to the temperature drift correction value. When the output values of the sensors S0 to S11 are decreased, the decrease width of the output value exceeds the increase amount of the output value of the sensor due to the influence of the actual temperature drift. In such a case, when the lip position calculation unit 107 calculates the lip position based on the output values of the sensors S0 to S11 after decreasing according to the output value of the sensor S12 which is the temperature drift correction value, it is actually There is a risk that a position different from the contact position of the lower lip will be erroneously calculated as the lip position.

Further, when the output values of the sensors S0 to S11, which are lip sensors, change due to the change in the contact position of the lower lip during performance, the above-mentioned formula (1) used for calculating the lip position by the lip position calculation unit 107. As is clear from), the smaller the value associated with the sensor as the value indicating the position, the smaller the change in the calculated lip position due to the change in the output value of the sensor. As described above, among the sensors S0 to S11, the sensor arranged at the position closer to the heel side end portion 44b of the lead substrate 44 is associated with a larger value as a value indicating the position. Therefore, the lower lip of the performer is located near the tip side end portion 44a of the lead substrate 44, that is, near the sensor S0 to which the smallest value indicating the position among the sensors S0 to S11 is associated. If the contact position of the lower lip changes minutely while in contact with the position, the minute change may not be captured as the change in the lip position calculated by the lip position calculation unit 107.

In view of the above circumstances, the lip position correction unit 108 acquires a correction value according to the lip position calculated by the lip position calculation unit 107 for removing the influence of the temperature drift from the output values of the sensors S0 to S11. By calculating the corrected lip position based on the output values of the sensors S0 to S11 reduced according to the correction value, the detection accuracy of the lip position is improved. Hereinafter, the above-mentioned correction value according to the lip position calculated by the lip position calculation unit 107 acquired by the lip position correction unit 108 is referred to as a "temperature drift correction value corresponding to the lip position", and the lip position calculation unit 107. Distinguish from the above-mentioned "temperature drift correction value" obtained by.

The lip position correction unit 108 determines the coefficient corresponding to the lip position calculated by the lip position calculation unit 107 by referring to the coefficient determination information stored in advance in the ROM 9, and the temperature drift information determines the determined coefficient. By multiplying the output value of the indicated sensor S12, the temperature drift correction value corresponding to the lip position is calculated. The coefficient determination information is data showing the correspondence between the lip position and the coefficient. The details of the correspondence between the lip position represented by the coefficient determination information and the coefficient will be described later. The coefficient determination information is generated in advance in ROM 9 after being generated by experimentally obtaining the coefficient at which the musical sound desired to be output by the performer is output when the electronic musical instrument 1 is used for playing for each lip position. Has been done. The above-mentioned method for generating the coefficient determination information is only an example, and the coefficient determination information can be generated by any method. For example, coefficient determination information may be generated by obtaining a coefficient for outputting a musical sound desired by the performer when the electronic musical instrument 1 is used for each lip position by computer simulation.

The lip position correction unit 108 sets the output values of the sensors S0 to S11 according to the temperature drift correction value corresponding to the lip position in order to remove the influence of the temperature drift from the output values of the sensors S0 to S11 indicated by the lip detection information. To reduce. That is, the lip position correction unit 108 subtracts the temperature drift correction value corresponding to the lip position from the output values of the sensors S0 to S11, and when the subtracted output value is 0 or more, the subtracted output value is reduced. It is acquired as a later output value, and if the output value after the subtraction is smaller than 0, 0 is acquired as the reduced output value. The value after the decimal point of the sensor output value after subtracting the temperature drift correction value corresponding to the lip position is rounded down. Note that this is only an example, and the output value of the sensor after subtracting the temperature drift correction value corresponding to the lip position may be rounded up to the nearest whole number.

The lip position correction unit 108 calculates the corrected lip position based on the output values of the sensors S0 to S11 after the decrease according to the temperature drift correction value corresponding to the lip position. Specifically, the lip position correction unit 108 reduces the values indicating the positions of the sensors S0 to S11 according to the temperature drift correction value corresponding to the lip position according to the following equation (2), and then the sensors S0 to S0 to The corrected lip position is calculated by weighted averaging using the output value of S11 as a weight. In the formula (2), Xg'represents the corrected lip position, and Xi represents a value indicating the position of the sensor to which the number i is associated as an identifier among the sensors S0 to S11. Further, in the equation (2), N represents the number of lip sensors included in the electronic musical instrument 1, and M'i is among the sensors S0 to S11 reduced according to the temperature drift correction value corresponding to the lip position. The number i represents the output value of the associated sensor as an identifier.

The lip position correction unit 108 reduces an integer from 0 to 11, which is a value indicating the position of the sensors S0 to S11, according to the temperature drift correction value corresponding to the lip position, according to the above equation (2). By weighted averaging using the output value of each sensor in the above as a weight, a value belonging to the range of 0 or more and 11 or less is calculated as the corrected lip position. The above-mentioned timbre determination unit 109 determines the timbre of the musical tone according to the value belonging to the range of 0 or more and 11 or less calculated as the corrected lip position by the lip position correction unit 108. The lip position correction unit 108 calculates a value belonging to the range of 0 or more and 11 or less calculated according to the above equation (2) by multiplying the value by 127/11 to obtain a value after the decimal point. By truncating, it is an integer value that belongs to the range of 0 or more and 127 or less, and is converted to a value represented by 7 bits corresponding to the MIDI (Musical Instrument Digital Interface) standard, and the value represented by the 7 bits is corrected. It may be acquired as the lip position of. In this case, the timbre determination unit 109 may determine the timbre of the musical tone according to the value represented by the 7 bits acquired as the corrected lip position by the lip position correction unit 108. For example, the tone color of the musical tone may be determined by using the value represented by 7 bits acquired as the corrected lip position as a parameter of the modulation depth, which is one of the control change messages of the MIDI standard. .. The lip position correction unit 108 calculates a value belonging to the range of 0 or more and 11 or less calculated according to the above equation (2) by multiplying the value by 127/11 to obtain a value after the decimal point. By rounding up, the value may be converted into a value represented by 7 bits, and the value represented by the 7 bits may be acquired as the corrected lip position.

FIG. 7 shows the correspondence between the lip position and the coefficient represented by the above-mentioned coefficient determination information. The correspondence shown in FIG. 7 is that the coefficient when the lip position is the second position closer to the sensor S12 which is the temperature drift sensor than the first position is the coefficient when the lip position is the first position. It is set to be smaller. For example, in the correspondence shown in FIG. 7, the coefficient is set to 1.0 when the lip position is 5.5, which is an example of the first position, while the lip position is the second position. The coefficient in the case of 10.0, which is an example, is set to 0.9, which is smaller than 1.0. As described above, the sensor S12 is provided at the position farthest from the tip side end portion 44a of the lead substrate 44 toward the heel side end portion 44b of the lead substrate 44 among the sensors S0 to S12. Further, as described above, each of the sensors S0 to S11 has a larger value as the sensor is arranged at a position distant from the tip side end portion 44a of the lead substrate 44 toward the heel side end portion 44b of the lead substrate 44. Is associated with a value indicating a position so that is associated with a value indicating a position. That is, in the correspondence shown in FIG. 7, the coefficient when the lip position is the second position away from the first position in the direction in which the value indicating the position of the sensor increases, and the lip position is the first position. It is set to be smaller than the coefficient when it is a position.

When the lip position calculated by the lip position calculation unit 107 is a second position closer to the sensor S12 than the first position, the lip position correction unit 108 has a coefficient smaller than the coefficient corresponding to the first position. By multiplying the output value of the sensor S12 by the coefficient corresponding to the position 2, the lip position calculated by the lip position calculation unit 107 is smaller than the temperature drift correction value corresponding to the lip position when the first position is concerned. The value is acquired as the temperature drift correction value corresponding to the lip position. For example, when the output value of the sensor S12 is 150 and the lip position calculated by the lip position calculation unit 107 is 5.5, which is an example of the first position, the lip position correction unit 108 outputs the sensor 12. The value 150 is multiplied by 1.0, which is a coefficient corresponding to the lip position, and 150 obtained is obtained as the temperature drift value corresponding to the lip position. On the other hand, when the output value of the sensor S12 is 150 and the lip position calculated by the lip position calculation unit 107 is 10.0, which is an example of the second position, the lip position correction unit 108 outputs the sensor 12. 135 obtained by multiplying the value 150 by the coefficient 0.9 corresponding to the lip position is acquired as the temperature drift value corresponding to the lip position.

When the lip position calculated by the lip position calculation unit 107 is a second position closer to the sensor S12 than the first position, the lip position correction unit 108 is concerned with the lip position calculated by the lip position calculation unit 107. The lip position calculated by the lip position calculation unit 107 is at the first position according to the temperature drift correction value corresponding to the lip position smaller than the temperature drift correction value corresponding to the lip position in the case of the first position. The output values of the sensors S0 to S11 are reduced by a reduction width smaller than the reduction width in a certain case. Then, the lip position correction unit 108 is corrected by weighted averaging the values indicating the positions of the sensors S0 to S11 using the output values of the reduced sensors S0 to S11 as weights according to the above equation (2). Calculate the lip position.

With this configuration, the lip position correction unit 108 has the lip position calculated by the lip position calculation unit 107 at a position near the sensor S12 which is a temperature drift sensor, that is, the heel side end portion 44b of the lead substrate 44. When the output values of the sensors S0 to S11 are reduced in order to eliminate the influence of temperature drift when the position is in the vicinity, the decrease width exceeds the increase amount of the sensor output value due to the influence of the actual temperature drift. It reduces the possibility of drifting and improves the detection accuracy of the lip position. According to such a configuration, when the performer plays with the lower lip in contact with the position near the sensor S12 which is the temperature drift sensor, the lip position which is the contact position of the lower lip is detected. It is possible to improve the accuracy and reduce the possibility that a musical sound different from the musical sound desired by the performer is output.

Further, in the correspondence shown in FIG. 7 represented by the coefficient determination information, the lip position is separated from the third position in the direction from the heel side end portion 44b of the lead substrate 44 toward the tip side end portion 44a of the lead substrate 44. The coefficient when the position is the fourth position is set to be larger than the coefficient when the lip position is the third position. For example, in the correspondence shown in FIG. 7, the coefficient is set to 1.0 when the lip position is 5.5, which is an example of the third position, while the lip position is an example of the fourth position. The coefficient for a certain 1.3 is set to 1.3, which is greater than 1.0. That is, in the correspondence shown in FIG. 7, the coefficient when the lip position is the fourth position away from the third position in the direction in which the value indicating the position of the sensor becomes smaller is the coefficient of the third position. It is set to be larger than the coefficient when it is a position. The direction from the heel side end 44b of the lead board 44 toward the tip side end 44a of the lead board 44 is from the tip side end 44a of the lead board 44 to the heel side end 44b of the lead board 44, which is an example of the reference direction. The direction is opposite to the direction you are heading.

In the lip position correction unit 108, the lip position calculated by the lip position calculation unit 107 is separated from the third position in the direction from the heel side end portion 44b of the lead substrate 44 toward the tip side end portion 44a of the lead substrate 44. In the case of the fourth position, the lip position calculated by the lip position calculation unit 107 by multiplying the output value of the sensor S12 by the coefficient corresponding to the fourth position, which is larger than the coefficient corresponding to the third position. Acquires a value larger than the temperature drift correction value corresponding to the lip position when is the third position as the temperature drift correction value corresponding to the lip position. For example, when the output value of the sensor S12 is 150 and the lip position calculated by the lip position calculation unit 107 is 5.5, which is an example of the third position, the lip position correction unit 108 outputs the sensor 12. The value 150 is multiplied by 1.0, which is a coefficient corresponding to the lip position, and 150 obtained is obtained as the temperature drift value corresponding to the lip position. On the other hand, when the output value of the sensor S12 is 150 and the lip position calculated by the lip position calculation unit 107 is 1.3, which is an example of the fourth position, the lip position correction unit 108 outputs the sensor 12. 195 obtained by multiplying the value 150 by the coefficient 1.3 corresponding to the lip position is acquired as the temperature drift value corresponding to the lip position.

In the lip position correction unit 108, the lip position calculated by the lip position calculation unit 107 is separated from the third position in the direction from the heel side end 44b of the lead board 44 toward the tip side end 44a of the lead board 44. In the case of the fourth position, the temperature drift correction value corresponding to the lip position larger than the temperature drift correction value corresponding to the lip position when the lip position calculated by the lip position calculation unit 107 is the third position is set. Accordingly, the output values of the sensors S0 to S11 are reduced by a reduction width larger than the reduction width when the lip position calculated by the lip position calculation unit 107 is the third position. Then, the lip position correction unit 108 is corrected by weighted averaging the values indicating the positions of the sensors S0 to S11 using the output values of the reduced sensors S0 to S11 as weights according to the above equation (2). Calculate the lip position. The larger the decrease in the output values of the sensors S0 to S11 in the process of removing the influence of the temperature drift, the smaller the sum of the output values of the reduced sensors S0 to S11, which is the denominator of the equation on the right side of the equation (2). .. As is clear from the equation (2), the smaller the denominator of the equation on the right side of the equation (2), the smaller the value indicating the position of the sensors S0 to S11 corresponds to the change in the output value of the associated sensor. The change in the lip position after correction becomes large.

With this configuration, the lip position correction unit 108 has a position where the sensor is arranged so that the lip position calculated by the lip position calculation unit 107 is associated with a small value as a value indicating the position among the sensors S0 to S11. That is, when the position is near the tip side end 44a of the lead substrate 44, the change in the corrected lip position according to the change in the output value of the sensor is increased, and the detection accuracy of the change in the lip position is improved. It is improving. According to such a configuration, the performer performed while slightly changing the contact position of the lower lip while the lower lip was in contact with the position near the tip side end portion 44a of the lead substrate 44. In some cases, it is possible to improve the detection accuracy of the lip position, reproduce the detailed performance expression of the performer, and reduce the possibility that the music sound different from the music sound desired by the performer is output. ..

As described above, the lip position correction unit 108 corrects the lip position calculated by the lip position calculation unit 107 by using the temperature drift correction value corresponding to the calculated lip position to obtain the lip position. The detection accuracy is improved to enable detailed performance expression, and the possibility that a musical tone different from the musical tone desired by the performer is output is reduced.

Hereinafter, with reference to FIGS. 8A to 8C, the sensor S12 on the lead unit 41 relates to the calculation of the lip position by the lip position calculation unit 107 and the correction of the lip position by the lip position correction unit 108. The case where the lower lip of the performer is in contact with 9.5, which is a position in the vicinity of, will be described as an example. Specifically, the case where the output value shown in FIG. 8A is output from the sensors S0 to S12 will be described below as an example. FIG. 8A shows the correspondence between the sensor and the output value of the sensor.

The lip position calculation unit 107 acquires the output values of the sensors S0 to S11 shown in FIG. 8A based on the lip detection information acquired by the lip detection information acquisition unit 103, and is acquired by the temperature drift information acquisition unit 104. The output value of the sensor S12 shown in FIG. 8A is acquired based on the obtained temperature drift information. The lip position calculation unit 107 acquires 123, which is an output value of the sensor S12, as a temperature drift correction value, and reduces the output values of the sensors S0 to S11 according to the acquired temperature drift correction value. FIG. 8B shows a sensor, a value indicating the position of the sensor previously associated with the sensor, and an output value of the sensor after being reduced according to the temperature drift correction value by the lip position calculation unit 107. It shows the correspondence. The lip position calculation unit 107 reduced the values indicating the positions of the sensors S0 to S11 shown in FIG. 8 (b) according to the temperature drift correction value shown in FIG. 8 (b) according to the above equation (1). 10.03 is calculated as the lip position by weighted averaging using the output values of the subsequent sensors S0 to S11 as weights.

The lip position correction unit 108 acquires the output values of the sensors S0 to S11 shown in FIG. 8A based on the lip detection information acquired by the lip detection information acquisition unit 103, and is acquired by the temperature drift information acquisition unit 104. The output value of the sensor S12 shown in FIG. 8A is acquired based on the obtained temperature drift information. The lip position correction unit 108 acquires 0.9 as a coefficient corresponding to 10.03, which is the lip position calculated by the lip position calculation unit 107, by referring to the coefficient determination information stored in the ROM 9. The lip position correction unit 108 multiplies the acquired coefficient 0.9 by the output value 123 of the sensor S12, so that the temperature drift correction value corresponding to the lip position calculated by the lip position calculation unit 107 is 110. Get 7. The lip position correction unit 108 reduces the output values of the sensors S0 to S11 according to the temperature drift correction value of 110.7 corresponding to the acquired lip position. FIG. 8 (c) shows the sensor, a value indicating the position of the sensor previously associated with the sensor, and the sensor after being reduced according to the temperature drift correction value corresponding to the lip position by the lip position correction unit 108. The correspondence between the output value and is shown. The lip position correction unit 108 changes the value indicating the position of the sensors S0 to S11 shown in FIG. 8 (c) to the temperature drift correction value corresponding to the lip position shown in FIG. 8 (c) according to the above equation (2). 9.404 is calculated as the corrected lip position by weighted averaging using the output values of the sensors S0 to S11 after being reduced accordingly as weights.

In the above example, 9.404, which is the corrected lip position calculated by the lip position correction unit 108, is compared with 10.03, which is the lip position calculated by the lip position calculation unit 107, and is an actual performer. It is close to 9.5, which is the contact position of the lower lip. That is, the lip position correction unit 108 improves the lip position detection accuracy by correcting the lip position calculated by the lip position calculation unit 107 using the temperature drift correction value corresponding to the calculated lip position. I'm letting you.

Hereinafter, the musical sound sounding process executed by the electronic musical instrument 1 having the above-mentioned physical and functional configurations will be described with reference to the flowchart of FIG. Note that FIG. 9 shows only the processes related to the feature portion of the present invention among the processes that can be performed by the electronic musical instrument 1. The electronic musical instrument 1 can perform arbitrary processing not shown in FIG. For example, the electronic musical instrument 1 may execute a display control process for controlling the display of an image by the display unit described above. When the performer turns on the power of the electronic musical instrument 1 by operating the above-mentioned power key included in the operator 3, the CPU 8 starts the musical sound sounding process shown in the flowchart of FIG.

When the musical tone sounding process is started, the CPU 8 first executes an initialization process for initializing various settings of the electronic musical instrument 1 (step S101). After executing the process of step S101, the key / switch information acquisition unit 100 acquires key / switch information indicating an operation detection result for a plurality of keys included in the operator 3 from the operator 3 (step S102). After executing the process of step S102, the pitch determination unit 105 determines the pitch of the musical tone according to the detection result of the operation for the plurality of keys indicated by the key / switch information acquired in step S102 (step S103).

After executing the process of step S103, the breath pressure information acquisition unit 101 indicates the breath pressure information indicating the output value of the pressure sensor 60 that detects the breath pressure of the performer blown into the mouthpiece 4 from the breath pressure detection unit 6. (Step S104). After executing the process of step S104, the tongue detection information acquisition unit 102 acquires the tongue detection information indicating the output value of the sensor S0, which is a tongue sensor, from the contact detection unit 7 (step S105). After executing the process of step S105, the volume determination unit 106 determines the output value of the pressure sensor 60 indicated by the breath pressure information acquired in step S104 and the output value of the sensor S0 indicated by the tongue detection information acquired in step S105. , The volume of the musical sound is determined according to (step S106).

After executing the process of step S106, the CPU 8 executes a lip detection process for acquiring the lip position (step S107). Details of the lip detection process executed in step S107 will be described later. After executing the process of step S107, the timbre determination unit 109 determines the timbre of the musical tone according to the lip position acquired in step S107 (step S108).

After executing the process of step S108, the musical tone output unit 110 controls the sound system 5 to have a musical tone having a pitch determined in step S103, a volume determined in step S106, and a timbre determined in step S108. Is pronounced (step S109). Specifically, in the process of step S109, the musical tone output unit 110 controls the sound source 11 and has a pitch determined in step S103, a volume determined in step S106, and a tone color determined in step S108. A digital musical tone signal representing a musical tone is generated, the digital musical tone signal is output to the sound system 5, and the sound system 5 is controlled to produce a musical tone represented by the digital musical tone signal input from the sound source 11. In the process of step S109, when the musical tone is being pronounced and the volume determined in step S106 is 0, the process of muting the pronounced musical tone is performed. On the other hand, in the process of step S109, when the musical tone is not pronounced and the volume determined in step S106 is 0, the process of maintaining the musical tone is not pronounced, that is, the silent state is performed. To be pronounced.

After executing the process of step S109, the CPU 8 determines whether or not the predetermined end condition is satisfied (step S110). In the present embodiment, the termination condition is satisfied when the performer turns off the power of the electronic musical instrument 1 by operating the power key included in the operator 3. This is just an example, and the end condition can be set arbitrarily. For example, it may be configured so that the end condition is satisfied when the occurrence of an operation error is detected. If it is determined in step S110 that the end condition is not satisfied (step S110; No), the process returns to step S102. On the other hand, when it is determined that the end condition is satisfied (step S110; Yes), the CPU 8 ends the musical tone sounding process. With such a configuration, the CPU 8 repeatedly executes the processes of steps S102 to S110 until it is determined that the end condition is satisfied in step S110 (step S110; Yes).

Hereinafter, the details of the lip detection process executed in step S107 of the musical tone sounding process will be described with reference to the flowchart of FIG.

When the lip detection process is started, first, the lip detection information acquisition unit 103 acquires lip detection information indicating the output values of the sensors S0 to S11, which are lip sensors, from the contact detection unit 7 (step S201). After executing the process of step S201, the temperature drift information acquisition unit 104 acquires temperature drift information indicating the output value of the sensor S12, which is a temperature drift sensor, from the contact detection unit 7 (step S202). After executing the process of step S202, the lip position calculation unit 107 acquires the output value of the sensor S12 indicated by the temperature drift information acquired in step S202 as the temperature drift correction value (step S203).

After executing the process of step S203, the lip position calculation unit 107 reduces the output values of the sensors S0 to S11 indicated by the lip detection information acquired in step S201 according to the temperature drift correction value acquired in step S203. (Step S204). Specifically, in the process of step S204, the lip position calculation unit 107 subtracts the temperature drift correction value from the output values of the sensors S0 to S11, and when the output value after the subtraction is 0 or more, the output after the subtraction. While the value is acquired as the output value after the decrease, if the output value after the subtraction is smaller than 0, 0 is acquired as the output value after the decrease. The value after the decimal point of the sensor output value after subtracting the temperature drift correction value shall be truncated.

After executing the process of step S204, the CPU 8 calculates the sum of the output values of the sensors S0 to S11 after being reduced in step S204 (step S205). After executing the process of step S205, the CPU 8 determines whether or not the performer is holding the mouthpiece 4 in his or her mouth by determining whether or not the sum calculated in step S205 is equal to or greater than a predetermined contact threshold value. Determination (step S206). Specifically, in the process of step S206, when the total calculated in step S205 is equal to or greater than the contact threshold value, the CPU 8 determines that the performer is holding the mouthpiece 4 in his mouth, while the total sum is the contact threshold value. If it is smaller, it is determined that the performer does not hold the mouthpiece 4 in his mouth. The contact threshold is the average value of the total output values of the sensors S0 to S11 after being reduced according to the output value of the sensor S12 as the temperature drift correction value when the player holds the mouthpiece 4 in his mouth. It is obtained by an experiment and is preset to a value obtained by multiplying the average value of the sum by 0.8. The method for determining the contact threshold value described above is only an example, and the contact threshold value can be determined by any method. For example, the average of the total output values of the sensors S0 to S11 after being reduced according to the output value of the sensor S12 as the temperature drift correction value when the performer holding the mouthpiece 4 in his mouth, which is obtained by the experiment. The value obtained by multiplying the value by 0.7 may be set as the contact threshold.

In the process of step S206, when it is determined that the sum calculated in step S205 is smaller than the contact threshold value, that is, when it is determined that the performer does not hold the mouthpiece 4 in the mouth (step S206; No), the CPU 8 , A predetermined default position (5.0 in this embodiment) is acquired as a lip position (step S207), and the lip detection process is terminated.

On the other hand, in the process of step S206, when it is determined that the sum calculated in step S205 is equal to or greater than the contact threshold value, that is, when it is determined that the performer is holding the mouthpiece 4 in his mouth (step S206; Yes). ), The lip position calculation unit 107 calculates the lip position based on the output values of the sensors S0 to S11 after being reduced in step S204 (step S208). Specifically, in the process of step S208, the lip position calculation unit 107 uses the output values of the sensors S0 to S11 after being reduced in step S204 as weights according to the above equation (1), and the sensors S0 to S11. The lip position is calculated by weighted averaging the values indicating the positions of.

After executing the process of step S208, the lip position correction unit 108 determines the coefficient corresponding to the lip position calculated in step S208 by referring to the coefficient determination information stored in advance in ROM 9 (step S209). After executing the process of step S209, the lip position correction unit 108 calculates in step S208 by multiplying the output value of the sensor S12 indicated by the temperature drift information acquired in step S202 by the coefficient acquired in step S209. The temperature drift correction value corresponding to the lip position is calculated (step S210).

After executing the process of step S210, the lip position correction unit 108 uses the output values of the sensors S0 to S11 indicated by the lip detection information acquired in step S201 as the temperature drift correction value corresponding to the lip position calculated in step S210. (Step S211). Specifically, in the process of step S211, the lip position correction unit 108 subtracts the temperature drift correction value corresponding to the lip position from the output values of the sensors S0 to S11, and when the output value after the subtraction is 0 or more, The output value after the subtraction is acquired as the output value after the decrease, while when the output value after the subtraction is smaller than 0, 0 is acquired as the output value after the decrease. The value after the decimal point of the sensor output value after subtracting the temperature drift correction value corresponding to the lip position is rounded down.

After the processing of step S211 is executed, the lip position correction unit 108 corrects the lip position based on the output values of the sensors S0 to S11 after being reduced according to the temperature drift correction value corresponding to the lip position in step S211. Is calculated (step S212), and the lip detection process is terminated. Specifically, in the process of step S212, the lip position correction unit 108 uses the output values of the sensors S0 to S11 after being reduced in step S211 as weights according to the above equation (2), and the sensors S0 to S11. The corrected lip position is calculated by weighted averaging the values indicating the positions of.

As described above, the electronic musical instrument 1 calculates the lip position based on the output values of the sensors S0 to S12, and uses the calculated lip position as the temperature drift correction value corresponding to the calculated lip position. It corrects and outputs a musical sound according to the corrected lip position. With such a configuration, it is possible to improve the accuracy of detecting the lip position and reduce the possibility that a musical tone different from the musical tone desired by the performer is output.

Further, in the electronic musical instrument 1, when the lip position calculated by the lip position calculation unit 107 is a second position closer to the sensor S12 which is a temperature drift sensor than the first position, the electronic musical instrument 1 is calculated by the lip position calculation unit 107. The output values of the sensors S0 to S11 are reduced by a reduction width smaller than the reduction width when the lip position is the first position, and the output values of the sensors S0 to S11 after the reduction are used as weights of the sensors S0 to S11. The corrected lip position is calculated by weighted averaging the values indicating the positions. According to such a configuration, when the performer plays with the lower lip in contact with the position near the sensor S12, the detection accuracy of the lip position, which is the contact position of the lower lip, is improved. It is possible to reduce the possibility that a musical sound different from the musical sound desired by the performer is output.

Further, in the electronic musical instrument 1, the lip position calculated by the lip position calculation unit 107 is separated from the third position in the direction from the heel side end portion 44b of the lead substrate 44 toward the tip side end portion 44a of the lead substrate 44. In the case of the fourth position, the output values of the sensors S0 to S11 are reduced by a reduction width larger than the reduction width in the case where the lip position calculated by the lip position calculation unit 107 is the third position, and after the reduction. The corrected contact position is calculated by weighted averaging the values indicating the positions of the sensors S0 to S11 using the output values of the sensors S0 to S11 as weights. According to such a configuration, the performer performed while slightly changing the contact position of the lower lip while the lower lip was in contact with the position near the tip side end portion 44a of the lead substrate 44. In this case, the accuracy of detecting the lip position can be improved, and the possibility that a music sound different from the music sound desired by the performer is output can be reduced.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, in the above embodiment, the contact operation means is described as a lead portion 41 that accepts a contact operation using the lower lip by the performer, but this is only an example, and the contact operation means is by the performer. It may have any configuration that accepts contact operations. For example, the contact operation means may be a touch pad provided on the tube body portion 2 held by the performer and accepting the contact operation by the performer using a finger.

FIG. 11 is a rear view of the electronic musical instrument 1 according to a modified example of the present invention. As shown in FIG. 11, a touch pad 13 for receiving a contact operation using a finger by a performer is provided on the back surface of the tube body 2 of the electronic musical instrument 1 according to the present modification. The touch pad 13 is an example of a contact operation means. The electronic musical instrument 1 according to this modification detects the thumb position, which is the contact position of the thumb of the performer in contact with the touch pad 13, and produces a musical sound to which effects such as pitch bend and modulation are added according to the detected thumb position. Output.

As shown in FIG. 12, a plurality of sensors S13 to S22 are arranged on the touchpad 13 in the direction from the left end 13a of the touchpad 13 to the right end 13b of the touchpad 13. The sensors S13 to S22 are capacitive touch sensors that detect contact by the performer. The direction from the left end portion 13a of the touch pad 13 to the right end portion 13b of the touch pad 13 is an example of the reference direction. The sensor S13 is configured to be covered with a cover (not shown) so that the performer's body does not come into contact with the sensor S13, and functions as a temperature drift sensor. The sensor S13 is an example of a reference sensor. The sensors S14 to S22 are configured so that the performer's body can come into contact with each other, and function as a thumb sensor for detecting the contact of the performer's thumb. A value indicating the position of the sensor is associated with each of the thumb sensors S14 to S22 in advance.

In this modification, the CPU 8 calculates the thumb position based on the output value of the sensor S13 which is a temperature drift sensor and the output values of the sensors S14 to S22 which are thumb sensors. To calculate the thumb position, the method used by the lip position calculation unit 107 to calculate the lip position in the above embodiment may be applied. That is, the CPU 8 acquires the output value of the sensor S13 as the temperature drift correction value, and uses the output value of the sensors S14 to S22 reduced according to the acquired temperature drift correction value as a weight, and uses the output values of the sensors S14 to S22 as weights. The thumb position may be calculated by weighted averaging the values indicating the positions. The CPU 8 corrects the calculated thumb position according to the calculated thumb position, and outputs a musical tone to which an effect corresponding to the corrected thumb position is added. To correct the thumb position, the method used by the lip position correction unit 108 for correcting the lip position in the above embodiment may be applied. That is, the CPU 8 may determine the coefficient corresponding to the calculated thumb position by referring to the data indicating the correspondence relationship between the thumb position and the coefficient stored in advance in the ROM 9. Then, the CPU 8 indicates the positions of the sensors S14 to S22 by using the output values of the sensors S14 to S22, which are reduced according to the correction value obtained by multiplying the output value of the sensor S13 by the determined coefficient, as weights. The corrected thumb position may be calculated by weighted averaging the values. According to such a configuration, it is possible to improve the detection accuracy of the thumb position and reduce the possibility that a musical tone different from the musical tone desired by the performer is output.

In the above embodiment, the electronic musical instrument 1 is configured to accept the operation of setting the temperature drift correction value corresponding to the lip position by the performer, and the lip position correction unit 108 is calculated by the lip position calculation unit 107. The lip position may be configured to be corrected by using the temperature drift correction value corresponding to the lip position set by the performer. For example, the setting key provided in the operator 3 is configured to include a correction value setting key that accepts an operation for setting a temperature drift correction value corresponding to the lip position by the performer, and the lip position correction unit 108 is configured to include the operation operator 3. The temperature drift correction value corresponding to the lip position may be acquired according to the detection result of the operation for the correction value setting key indicated by the key / switch information input from. In this case, the lip position correction unit 108 calculates the corrected lip position by the same method as in the above embodiment using the temperature drift correction value corresponding to the acquired lip position, and the musical tone output unit 110 calculates the lip position. A musical tone corresponding to the corrected lip position calculated by the position correction unit 108 is output. According to such a configuration, the performer uses the temperature drift correction value corresponding to the lip position, which is used for the correction of the lip position calculated by the lip position calculation unit 107, to be a performance habit peculiar to the performer. It is possible to adjust according to factors such as the shape of the lips peculiar to the performer and the sensor characteristics peculiar to the electronic musical instrument 1, reducing the possibility that a musical sound different from the musical sound desired by the performer is output. can.

In the above embodiment, the electronic musical instrument 1 has been described as having a shape imitating the shape of a saxophone, but this is only an example, and the shape of the electronic musical instrument 1 imitates the shape of an arbitrary acoustic wind instrument. It may be a shape. For example, the shape of the electronic musical instrument 1 may be a shape that imitates the shape of a flute or a clarinet, which is an acoustic wind instrument.

In addition, it is possible to provide a dedicated electronic musical instrument having a configuration for realizing each function according to the present invention in advance as the electronic musical instrument according to the present invention, and by applying a program, an existing electronic musical instrument can be used according to the present invention. It can also function as an electronic musical instrument. That is, the existing electronic musical instrument according to the present invention is applied by applying a program for realizing each function of the electronic musical instrument according to the present invention so that a processor such as a CPU that controls the existing electronic musical instrument can execute the existing electronic musical instrument. It can function as an electronic musical instrument.

The method of applying such a program is arbitrary. The program can be stored and applied in a computer-readable storage medium such as a flexible disc, a CD (Compact Disc) -ROM, a DVD (Digital Versatile Disc) -ROM, or a memory card. Further, the program can be superimposed on the carrier wave and applied via a communication medium such as the Internet. For example, the program may be posted and distributed on a bulletin board system (BBS: Bulletin Board System) on a communication network. Then, by starting this program and executing it in the same manner as other application programs under the control of the OS (Operating System), the above processing may be executed.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the specific embodiment, and the present invention includes the invention described in the claims and the equivalent range thereof. included. The inventions described in the original claims of the present application are described below.

(Appendix 1)
The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. Contact position calculation means calculated based on
A contact position correction means that corrects the contact position calculated by the contact position calculation means by using a correction value corresponding to the calculated contact position.
To prepare
An electronic musical instrument characterized by that.

(Appendix 2)
Further provided, a musical sound output means for outputting a musical sound corresponding to the contact position corrected by the contact position correction means.
The electronic musical instrument according to claim 1.

(Appendix 3)
The plurality of sensors include a reference sensor configured to prevent contact with the performer's body.
Of the plurality of sensors, each sensor other than the reference sensor is associated with a value indicating the position of the sensor in advance.
The contact position calculation means reduces the output value of each sensor other than the reference sensor among the plurality of sensors according to the output value of the reference sensor, and uses the reduced output value of each sensor as a weight. The contact position is calculated by weighted averaging the values indicating the positions of the sensors.
The contact position correction means is the reference among the plurality of sensors according to the correction value obtained by multiplying the output value of the reference sensor by the coefficient corresponding to the contact position calculated by the contact position calculation means. The corrected contact position is calculated by reducing the output value of each sensor other than the sensor and using the reduced output value of each sensor as a weight to weight average the value indicating the position of each sensor.
The electronic musical instrument according to Appendix 1 or 2, characterized in that.

(Appendix 4)
When the contact position calculated by the contact position calculation means is a second position closer to the reference sensor than the first position, the contact position correction means is the contact position calculated by the contact position calculation means. The output value of each sensor other than the reference sensor among the plurality of sensors is reduced by a reduction width smaller than the reduction width in the case of the first position, and the output value of each sensor after the reduction is used as a weight. The corrected contact position is calculated by weighted averaging the values indicating the positions of each sensor.
The electronic musical instrument according to Appendix 3, which is characterized in that.

(Appendix 5)
Among the plurality of sensors, each sensor other than the reference sensor is associated with a value indicating the position of the sensor in advance so that a sensor arranged at a position farther from the reference direction is associated with a larger value. ,
The contact position correction means is calculated by the contact position calculation means when the contact position calculated by the contact position calculation means is a fourth position away from the third position in a direction opposite to the reference direction. The output value of each sensor other than the reference sensor among the plurality of sensors is reduced by a reduction width larger than the reduction width when the contact position is the third position, and the output value of each sensor after the reduction is calculated. The corrected contact position is calculated by weighted averaging the values indicating the positions of the respective sensors used as weights.
The electronic musical instrument according to Appendix 3 or 4, characterized in that.

(Appendix 6)
Accepts the operation of setting the correction value by the performer,
The contact position correction means corrects the contact position calculated by the contact position calculation means by using the correction value set by the performer.
The electronic musical instrument according to any one of Supplementary note 1 to 5, wherein the electronic musical instrument is characterized by the above.

(Appendix 7)
The contact operation means is included in a lead unit that receives a contact operation using the lips by the performer, or a touch pad unit that accepts the contact operation using the finger by the performer.
The electronic musical instrument according to any one of Supplementary note 1 to 6, wherein the electronic musical instrument is characterized by the above.

(Appendix 8)
The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. The contact position calculation step calculated based on
A contact position correction step that corrects the contact position calculated in the contact position calculation step by using a correction value corresponding to the calculated contact position, and a contact position correction step.
including,
A method of controlling an electronic musical instrument, which is characterized by the fact that.

(Appendix 9)
A computer that controls an electronic musical instrument,
The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. Contact position calculation means, which is calculated based on
A contact position correction means that corrects the contact position calculated by the contact position calculation means by using a correction value corresponding to the calculated contact position.
To function as,
A program characterized by that.

1 ... Electronic musical instrument, 2 ... Tube, 3 ... Operator, 4 ... Mouthpiece, 5 ... Sound system, 6 ... Breath pressure detector, 7 ... Contact Detection unit, 8 ... CPU, 9 ... ROM, 10 ... RAM, 11 ... Sound source, 12 ... System bus, 13 ... Touch pad, 13a ... Left end of touch pad Part, 13b ... Right end of the touchpad, 20 ... Finger rest, 21 ... Strap ring, 40 ... Main body, 40a ... Blow-in side end of the main body, 40b ...・ Tube side end of the main body, 41 ・ ・ ・ Lead part, 42 ・ ・ ・ Fixing bracket, 43 ・ ・ ・ Blow port, 44 ・ ・ ・ Lead board, 44a ・ ・ ・ Tip side end of lead board , 44b ... Heel side end of lead board, 60 ... Pressure sensor, 100 ... Key / switch information acquisition unit, 101 ... Breath pressure information acquisition unit, 102 ... Tan detection information acquisition unit , 103 ... Lip detection information acquisition unit, 104 ... Temperature drift information acquisition unit, 105 ... Sound pitch determination unit, 106 ... Volume determination unit, 107 ... Lip position calculation unit, 108 ... -Lip position correction unit, 109 ... sound color determination unit, 110 ... music output unit, S0 to S22 ... sensor

Claims (9)

The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. Contact position calculation means calculated based on
A contact position correction means that corrects the contact position calculated by the contact position calculation means by using a correction value corresponding to the calculated contact position.
To prepare
An electronic musical instrument characterized by that. Further provided, a musical sound output means for outputting a musical sound corresponding to the contact position corrected by the contact position correction means.
The electronic musical instrument according to claim 1. The plurality of sensors include a reference sensor configured to prevent contact with the performer's body.
Of the plurality of sensors, each sensor other than the reference sensor is associated with a value indicating the position of the sensor in advance.
The contact position calculation means reduces the output value of each sensor other than the reference sensor among the plurality of sensors according to the output value of the reference sensor, and uses the reduced output value of each sensor as a weight. The contact position is calculated by weighted averaging the values indicating the positions of the sensors.
The contact position correction means is the reference among the plurality of sensors according to the correction value obtained by multiplying the output value of the reference sensor by the coefficient corresponding to the contact position calculated by the contact position calculation means. The corrected contact position is calculated by reducing the output value of each sensor other than the sensor and using the reduced output value of each sensor as a weight to weight average the value indicating the position of each sensor.
The electronic musical instrument according to claim 1 or 2, wherein the electronic musical instrument is characterized by the above. When the contact position calculated by the contact position calculation means is a second position closer to the reference sensor than the first position, the contact position correction means is the contact position calculated by the contact position calculation means. The output value of each sensor other than the reference sensor among the plurality of sensors is reduced by a reduction width smaller than the reduction width in the case of the first position, and the output value of each sensor after the reduction is used as a weight. The corrected contact position is calculated by weighted averaging the values indicating the positions of each sensor.
The electronic musical instrument according to claim 3, wherein the electronic musical instrument is characterized by the above. Among the plurality of sensors, each sensor other than the reference sensor is associated with a value indicating the position of the sensor in advance so that a sensor arranged at a position farther from the reference direction is associated with a larger value. ,
The contact position correction means is calculated by the contact position calculation means when the contact position calculated by the contact position calculation means is a fourth position away from the third position in a direction opposite to the reference direction. The output value of each sensor other than the reference sensor among the plurality of sensors is reduced by a reduction width larger than the reduction width when the contact position is the third position, and the output value of each sensor after the reduction is calculated. The corrected contact position is calculated by weighted averaging the values indicating the positions of the respective sensors used as weights.
The electronic musical instrument according to claim 3 or 4, wherein the electronic musical instrument is characterized by the above. Accepts the operation of setting the correction value by the performer,
The contact position correction means corrects the contact position calculated by the contact position calculation means by using the correction value set by the performer.
The electronic musical instrument according to any one of claims 1 to 5, wherein the electronic musical instrument is characterized by the above. The contact operation means is included in a lead unit that receives a contact operation using the lips by the performer, or a touch pad unit that accepts the contact operation using the finger by the performer.
The electronic musical instrument according to any one of claims 1 to 6, wherein the electronic musical instrument is characterized by the above. The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. The contact position calculation step calculated based on
A contact position correction step that corrects the contact position calculated in the contact position calculation step by using a correction value corresponding to the calculated contact position, and a contact position correction step.
including,
A method of controlling an electronic musical instrument, which is characterized by the fact that. A computer that controls an electronic musical instrument,
The contact positions of a part of the performer's body that has come into contact with the contact operation means that accepts the contact operation by the performer are arranged in the reference direction on the contact operation means, and the output values of a plurality of sensors that detect the contact by the performer. Contact position calculation means, which is calculated based on
A contact position correction means that corrects the contact position calculated by the contact position calculation means by using a correction value corresponding to the calculated contact position.
To function as,
A program characterized by that.

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