JP2011257509A - Performance device and electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize change in musical sound as desired by a performer after starting production of sound.SOLUTION: On a performance device body 11 that extends in a longitudinal direction thereof and that is to be held by a performer with his or her hand are placed an acceleration sensor 23 and an angular velocity sensor 22 for detecting an angular velocity around an axis in the longitudinal direction. In the performance device body 11, a CPU 21 acquires a new sound volume level of a produced musical sound based on change in angular velocity sensor value according to rotation of the performance device body 11 around the axis in the longitudinal direction, and sends a control event including such new sound volume level to a sound source unit 19. Thus, after starting production of a musical sound by swinging the performance device body 11, the sound volume level of the musical sound is changed by turning the wrist so as to rotate the performance device body 11 around the axis in the longitudinal direction.

Description

  The present invention relates to a performance apparatus and an electronic musical instrument that generate music by holding and shaking by a player.

  Conventionally, there has been proposed an electronic musical instrument in which a sensor is provided on a stick-shaped member, and the player detects the movement of the member by holding the member by hand and shakes the member to generate a musical sound. ing. In particular, in this electronic musical instrument, the stick-shaped member has a shape like a drum stick or a drum repellent, so that a percussion instrument sound is uttered in response to the player's action of hitting the drum or drum. It has become.

  For example, in Patent Document 1, an acceleration sensor is provided on a stick-shaped member, and when a predetermined time elapses after the output from the acceleration sensor (acceleration sensor value) reaches a predetermined threshold value, a musical sound is generated. A configured performance device has been proposed.

Japanese Patent No. 2663503 Japanese Patent Application No. 2007-256736

  In the performance device disclosed in Patent Document 1, only the sound generation of the musical tone is controlled based on the acceleration sensor value of the stick-shaped member, and it is not easy to realize the musical tone change as desired by the performer. There was no problem.

  Patent Document 2 proposes an apparatus that can generate a plurality of timbres, and uses a geomagnetic sensor to generate one of a plurality of timbres according to the direction in which the stick-shaped member is directed. In the device proposed in Patent Document 2, the musical tone is changed at the start of performance, that is, in the direction in which the stick-shaped member is swung.

  An object of the present invention is to provide a performance device and an electronic musical instrument capable of realizing a desired change in musical tone by a performer after sound generation is started.

An object of the present invention is to provide a holding member extending in a longitudinal direction for a player to hold by hand,
An acceleration sensor disposed in the holding member;
An angular acceleration sensor for detecting angular acceleration accompanying rotation of the holding member about the longitudinal axis;
Control means for giving a sound generation instruction to a music sound generating means for generating a predetermined music sound,
A sounding instruction means for giving a sounding instruction to the music sound generating means at a sounding timing acquired based on the acceleration sensor value;
After reaching the sound generation timing, a new volume level of the sounded tone is acquired based on a change in the angular velocity sensor value detected by the angular velocity sensor, and the new volume level is obtained with respect to the tone generation means. And a volume level change instructing means for providing.

  In a preferred embodiment, the volume level change instruction means increases the volume level when the holding member is rotated in the first direction around the longitudinal axis based on the angular velocity sensor value. The new volume level is acquired so as to decrease the volume level when rotated about the longitudinal axis in a second direction opposite to the first direction.

  In a more preferred embodiment, the volume level change instructing means calculates an increase amount of the volume level based on the angular velocity sensor value when the holding member is rotated in the first direction around the longitudinal axis. The volume level reduction amount is calculated based on the angular velocity sensor value when the holding member is rotated in the second direction around the longitudinal axis.

  In another preferred embodiment, the volume level change instructing means is a displacement from the position of the holding member at the sounding timing based on the angular velocity sensor value when the holding member is rotated about the longitudinal axis. And the amount of increase in the volume level is calculated based on the displacement when the holding member is rotated in the first direction around the longitudinal axis, and the holding member is rotated around the longitudinal axis. Based on the displacement when rotated in the second direction, the amount of decrease in the volume level is calculated.

  In a preferred embodiment, the sound generation instructing unit generates a sound when the acceleration sensor value exceeds a predetermined first threshold and then becomes smaller than a second threshold smaller than the first threshold. As timing, an instruction for sound generation is given to the musical sound generating means.

  In a more preferred embodiment, the sound generation instruction means detects a maximum value of the acceleration sensor value and calculates an initial volume level according to the maximum value.

Another object of the present invention is to provide the above performance device,
A musical instrument unit comprising the musical sound generating means,
The performance device and the musical instrument unit are each achieved by an electronic musical instrument comprising a communication means.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the performance apparatus and electronic musical instrument which can implement | achieve the change of the desired musical tone by a player after sounding is started.

FIG. 1 is a block diagram showing the configuration of the electronic musical instrument according to the first embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the performance device main body according to the present embodiment. FIG. 3 is a flowchart showing an example of processing executed in the performance apparatus main body according to the present embodiment. FIG. 4 is a flowchart showing an example of the sound generation timing detection process according to the present embodiment. FIG. 5 is a flowchart showing an example of the note-on event generation process according to the present embodiment. FIG. 6 is a flowchart showing an example of the volume level changing process according to the present embodiment. FIG. 7 is a flowchart showing an example of processing executed in the musical instrument unit according to the present embodiment. FIG. 8 is a flowchart showing an example of sound generation processing according to the present embodiment. FIG. 9 is a flowchart showing an example of the sound source processing according to the present embodiment. FIG. 10 is a graph schematically showing an example of the acceleration sensor value detected by the acceleration sensor of the performance device main body. FIG. 11 is a diagram schematically showing the external appearance of the performance device main body according to the present embodiment. FIG. 12 is a graph showing an example of change in angular acceleration due to rotation around the axis of the performance apparatus main body after the musical sound is started to be generated. FIGS. 13A and 13B are a graph showing a change in a certain angular velocity and a graph showing an example of a change in volume level corresponding to the change in the angular velocity. FIG. 14 is a flowchart showing an example of processing executed in the performance device main body according to the second embodiment of the present invention. FIG. 15 is a flowchart illustrating an example of sound generation timing detection processing according to the second embodiment. FIG. 16 is a flowchart illustrating an example of a volume level changing process according to the second embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of the electronic musical instrument according to the first embodiment of the present invention. As shown in FIG. 1, an electronic musical instrument 10 according to the present embodiment has a stick-like performance device main body 11 extending in the longitudinal direction for a player to shake in his / her hand. The electronic musical instrument 10 includes a musical instrument unit 19 for generating musical sounds. The musical instrument unit 19 includes a CPU 12, an interface (I / F) 13, a ROM 14, a RAM 15, a display unit 16, an input unit 17, and a sound system 18. Have. As will be described later, the performance apparatus main body 11 includes an acceleration sensor 23 and an angular velocity sensor 22 in the vicinity of the tip side opposite to the base side held by the performer.

  The I / F 13 of the musical instrument unit 19 accepts data (for example, a note-on event) from the performance apparatus main body 11, stores it in the RAM 15, and notifies the CPU 12 of acceptance of the data. In the present embodiment, for example, an infrared communication device 24 is provided at the base side end of the performance device main body 11, and an infrared communication device 33 is also provided in the I / F 13. Therefore, the musical instrument unit 19 can receive data from the performance apparatus main body 11 when the infrared communication apparatus 33 of the I / F 13 receives the infrared rays emitted from the infrared communication apparatus 24 of the performance apparatus main body 11.

  The CPU 12 controls the electronic musical instrument 10 as a whole, in particular, controls the musical instrument unit 19 of the electronic musical instrument, detects an operation of a key switch (not shown) constituting the input unit 17, and a note-on event received via the I / F 13. Various processes such as generation of musical sounds based on the above are executed.

  The ROM 14 controls the entire electronic musical instrument 10, in particular, controls the musical instrument unit 19 of the electronic musical instrument, detects operation of a key switch (not shown) constituting the input unit 17, and note-on events received via the I / F 13. Various processing programs, such as generation of musical sounds based on, are stored. The ROM 14 includes a waveform data area for storing waveform data of various timbres, particularly percussion instrument waveform data such as bass drum, hi-hat, snare, and cymbal. Of course, it is not limited to the waveform data of percussion instruments, and the ROM 22 may store waveform data of timbres of wind instruments such as flutes, saxophones and trumpet, keyboard instruments such as piano, and stringed instruments such as guitar.

  The RAM 15 stores programs read from the ROM 14 and data and parameters generated in the process. The data generated in the process includes the operation state of the switch of the input unit 17, the event received via the I / F 13, the tone generation state (sound generation flag) of the musical sound, and the like.

  The display unit 16 includes, for example, a liquid crystal display device (not shown) and can display a selected tone color or the like. The input unit 17 includes a switch (not shown) and can instruct designation of a timbre.

  The sound system 18 includes a sound source unit 31, an audio circuit 32, and a speaker 35. The sound source unit 31 reads waveform data from the waveform data area of the ROM 15 in accordance with an instruction from the CPU 12, generates musical tone data, and outputs it. The audio circuit 32 converts the musical sound data output from the sound source unit 31 into an analog signal, amplifies the converted analog signal, and outputs the amplified analog signal to the speaker 35. As a result, a musical sound is output from the speaker 35.

FIG. 2 is a block diagram showing the configuration of the performance device main body according to the present embodiment. As shown in FIG. 2, the performance apparatus main body 11 has an acceleration sensor 22 and an acceleration sensor 23 on the tip side that is opposite to the base side held by the performer. The position of the acceleration sensor 22 is not limited to the distal end side, and may be arranged on the root side. The acceleration sensor 22 is, for example, a sensor provided with a gyroscope, and can detect an angular velocity in rotation (reference numeral 201) around the longitudinal axis (refer to reference numeral 200 in FIG. 2) of the performance apparatus main body 11. .
The acceleration sensor 23 is, for example, a capacitance type or piezoresistive type sensor, and can output a data value indicating the generated acceleration. The acceleration sensor 23 according to the present embodiment outputs, for example, an acceleration sensor value in the axis (reference numeral 200) direction of the performance device main body 11.

  When the performer actually plays the drum, he holds one end (base side) of the stick in his hand and causes the stick to rotate around the wrist or the like. Therefore, in this embodiment, the acceleration sensor value in the axial direction of the performance apparatus main body 11 is acquired in order to detect the centrifugal force accompanying the rotational movement. Of course, a triaxial sensor may be used as the acceleration sensor.

  The performance device main body 11 includes a CPU 21, an infrared communication device 24, a ROM 25, a RAM 26, an interface (I / F) 27, and an input unit 28. The CPU 21 obtains the acceleration sensor value and the angular velocity sensor in the performance apparatus main body 11, detects the tone generation timing of the musical sound according to the acceleration sensor value, generates a note-on event, calculates the volume level value according to the angular velocity sensor value, and the volume level. Control event generation, note-on event via I / F 27 and infrared communication device 24, and control event transmission control.

  The ROM 25 acquires the acceleration sensor value and the angular velocity sensor in the performance device main body 11, detects the tone generation timing of the musical sound according to the acceleration sensor value, generates a note-on event, calculates the volume level value according to the angular velocity sensor value, Processing programs such as generation of control events including levels, transmission control of note-on events and control events via the I / F 27 and the infrared communication device 24 are stored. The RAM 26 stores values obtained or generated in the process such as sensor values. The I / F 27 outputs data to the infrared communication device 24 in accordance with an instruction from the CPU 21. The input unit 28 has a switch (not shown).

  FIG. 3 is a flowchart showing an example of processing executed in the performance apparatus main body according to the present embodiment. As shown in FIG. 3, the CPU 21 of the performance apparatus main body 11 executes initialization processing including clearing of data in the RAM 26 (step 301). When the initialization process (step 301) ends, the CPU 21 acquires the sensor value (acceleration sensor value) of the acceleration sensor 23 and stores it in the RAM 26 (step 302). As described above, in the present embodiment, the sensor value in the axial direction of the performance device main body 11 is employed as the acceleration sensor value. Further, the CPU 21 acquires the sensor value (angular velocity sensor value ω) of the angular velocity sensor 22 and stores it in the RAM 26 (step 303).

  Next, the CPU 21 executes a sound generation timing detection process (step 304). FIG. 4 is a flowchart showing an example of the sound generation timing detection process according to the present embodiment. As shown in FIG. 4, the CPU 21 reads the acceleration sensor value stored in the RAM 26 (step 401). Next, the CPU 21 determines whether the acceleration sensor value is greater than a predetermined first threshold value α (step 402). When it is determined Yes in step 402, the CPU 21 sets “1” to the acceleration flag in the RAM 26 (step 403). The CPU 21 determines whether the acceleration sensor value read in step 401 is larger than the maximum acceleration sensor value stored in the RAM 26 (step 404). If it is determined Yes in step 404, the acceleration sensor value read from the RAM 26 is stored in the RAM 26 as a new maximum value (step 405).

  If it is determined No in step 402, the CPU 21 determines whether the acceleration flag in the RAM 26 is “1” (step 406). If it is determined No in step 406, the sound generation timing detection process ends. If it is determined Yes in step 406, the CPU 21 determines whether the acceleration sensor value is smaller than a predetermined second threshold value β (step 407). If it is determined Yes in step 407, the CPU 21 executes a note-on event generation process (step 408).

  FIG. 5 is a flowchart showing an example of the note-on event generation process according to the present embodiment. By the note-on event generation process shown in FIG. 5, the note-on event is transmitted to the musical instrument unit 19, and then the sound generation process (see FIG. 8) and the sound source process (see FIG. 9) are executed in the musical instrument unit 19. Musical sound data is generated and a musical sound is generated from the speaker 35.

  Here, prior to the description of the note-on event generation process, the sound generation timing in the electronic musical instrument 10 according to the present embodiment will be described. FIG. 10 is a graph schematically showing an example of the acceleration sensor value detected by the acceleration sensor of the performance device main body. When the performer swings while holding one end (base side) of the performance apparatus main body 11, the performance apparatus main body 11 is caused to rotate with the wrist, elbow, shoulder, or the like as a fulcrum. Accompanying this rotational movement, in particular, acceleration is generated in the axial direction of the musical instrument main body 11 by centrifugal force.

  When the performer swings the performance apparatus main body 11, the acceleration sensor value gradually increases (see reference numeral 1001 in the curve 1000 in FIG. 10). When the performer swings the stick-like performance apparatus main body 11, generally, the operation is similar to the operation of hitting the drum. Therefore, the performer stops the operation of the stick (that is, the stick-shaped performance device main body 11) just before hitting the stick on the virtually set drum surface. Therefore, the acceleration sensor value gradually decreases from a certain time (see reference numeral 1002). The performer assumes that the musical sound is generated at the moment when the stick is struck on the virtual drum surface. Therefore, it is desirable that the musical sound can be generated at the timing assumed by the performer.

In the present invention, the logic described below is employed in order to generate a musical sound at the moment or slightly before the player strikes the virtual drum surface. The sound generation timing is when the acceleration sensor value decreases and becomes smaller than the second threshold value β slightly larger than “0”. However, there is a possibility that the acceleration sensor value vibrates and reaches around the above-described second threshold value β due to an operation unexpected by the performer. Therefore, in order to eliminate unexpected vibrations, it is a condition that the acceleration sensor value once rises and exceeds a predetermined first threshold value α (α is sufficiently larger than β). That is, (see time t _alpha) acceleration sensor value becomes temporarily larger than the first threshold value alpha, then, with the acceleration sensor value is reduced, when it becomes less than the second threshold value beta (see time t _beta), time t _β is used as the sound generation timing. When it is determined that the sound generation timing as described above has arrived, a note-on event is generated in the performance apparatus body 11 and transmitted to the musical instrument unit 10. In response to this, the musical instrument unit 19 performs a sound generation process and a sound source process to generate a musical sound.

  As shown in FIG. 5, in the note-on event generation process, the CPU 21 refers to the maximum value of the acceleration sensor value stored in the RAM 26 and determines the volume level (velocity) of the musical sound based on the maximum value ( Step 501).

When the maximum value of the acceleration sensor value is Amax and the maximum value of the volume level (velocity) is Vmax, the volume level Vel can be obtained as follows, for example.
Vel = a · Amax
(However, if a · Amax> Vmax, Vel = Vmax, and a is a predetermined positive coefficient)
The CPU 21 generates a note-on event including information indicating a volume level (velocity) and a predetermined tone color (step 502). Note that a predetermined value may be included as information indicating the pitch during the note-on event.

  The CPU 21 outputs the generated note-on event to the I / F 27 (step 503). The I / F 27 causes the infrared communication device 24 to transmit a note-on event as an infrared signal. An infrared signal from the infrared communication device 24 is received by the infrared communication device 33 of the musical instrument unit 19. Thereafter, the CPU 21 resets the acceleration flag in the RAM 26 to “0” (step 504).

  When the sound generation timing detection process (step 304) ends, the CPU 21 executes a volume level change process (step 305). FIG. 6 is a flowchart showing an example of the volume level changing process according to the present embodiment. In the present embodiment, as described below, when the performer rotates the musical instrument main body 11 about the axis (see reference numeral 200 in FIG. 2) after the sound generation timing has come, the angular velocity associated with the rotation is increased. The volume level can be changed accordingly.

  FIG. 11 is a diagram schematically showing the external appearance of the performance device main body according to the present embodiment. In FIG. 11, the performance device main body 11 is drawn so that the base side (see reference numeral 1101) is in the back and the front end side (see reference numeral 1102) is in front. As shown in FIG. 11, the angular velocity ω at the time of counterclockwise rotation (counterclockwise rotation: see arrow A) when viewed from the front end side 1102 is positive. On the other hand, the angular velocity ω at the time of right rotation (clockwise rotation: see arrow B) as viewed from the tip side 1102 is negative. Hereinafter, the rotation direction around the axis of the performance apparatus main body 11 refers to the rotation direction when viewed from the front end side 1102 of the performance apparatus main body 11. The above definition is intended to clarify the direction of rotation about the axis in this specification.

  In the second embodiment to be described later, a displacement (rotation angle) θ around the axis of the performance device main body 11 is used. With respect to this angle θ, the left rotation displacement (rotation angle) θ is positive, and the right rotation displacement (rotation angle) θ is negative. In the present embodiment, the volume increases when it is rotated counterclockwise around the axis of the performance apparatus main body 11, and the volume decreases when it is rotated clockwise.

  As shown in FIG. 6, in the volume level changing process, the CPU 21 reads the previous acquired value ωp, which is the angular velocity sensor value in the previous volume level changing process, stored in the RAM 26 (step 601). Next, the CPU 21 compares the previous acquired value ωp with the angular velocity sensor value ω acquired in step 303, and determines whether these values do not match (step 602). If NO in step 602, that is, if these values match, the volume level changing process is terminated.

When it is determined Yes in step 602, the volume level displacement ΔLev based on the angular velocity sensor value ω is calculated (step 603). As described above, when the counterclockwise rotation is performed around the axis of the performance apparatus main body 11, the angular velocity sensor value ω is positive, and ΔLev> 0. On the other hand, when it is rotated clockwise around the axis of the performance apparatus main body 11, the angular velocity sensor value ω is negative and therefore ΔLev <0. For example, ΔLev can be obtained as follows.
ΔLev = b · ω (where b is a predetermined positive coefficient)
Next, the CPU 21 calculates Vel + ΔLev as a new volume level Vel (step 604). If Vel + ΔLev ≧ Vmax, the new volume level is Vmax. The CPU 21 generates a control event including a change in volume level and a new volume level (step 605). The CPU 21 outputs the generated control event to the I / F 27 (step 606). The I / F 27 causes the infrared communication device 24 to transmit a control event as an infrared signal. An infrared signal from the infrared communication device 24 is received by the infrared communication device 33 of the musical instrument unit 19. Thereafter, the CPU 21 stores the angular velocity sensor value ω in the RAM 26 as the previous acquired value ωp (step 607).

  After the volume level changing process (step 305), the CPU 21 executes a parameter communication process (step 306). The parameter communication process (step 308) will be described together with the parameter communication process (step 705 in FIG. 7) in the musical instrument unit 19 described later.

  Next, processing executed in the musical instrument unit according to the present embodiment will be described. FIG. 7 is a flowchart showing an example of processing executed in the musical instrument unit according to the present embodiment. The CPU 12 of the musical instrument unit 19 executes initialization processing including clearing data in the RAM 15, clearing an image on the screen of the display unit 16, clearing the sound source unit 31, and the like (step 701). Next, the CPU 12 executes a switch process (step 702). In the switch process, for example, the following process is executed. The CPU 12 executes setting of the tone color of a musical tone to be generated according to the switch operation of the input unit 17. The CPU 12 stores the specified timbre information in the RAM 15.

  Next, the CPU 12 determines whether the I / F 13 has newly received an event (step 703). If it is determined Yes in step 703, the CPU 12 executes a sound generation process (step 704). FIG. 8 is a flowchart showing an example of sound generation processing according to the present embodiment. As shown in FIG. 8, the CPU 12 determines whether a note-on event is received (step 801). When it is determined Yes in step 801, the CPU 12 outputs the received note-on event to the sound source unit 31 (step 802). As a result, sound source processing (see FIG. 9) is started in the sound source unit 31 as will be described later.

  If it is determined No in step 801, the CPU 12 determines whether a control event has been received (step 803). If it is determined Yes in step 803, the CPU 12 determines whether the sound generation flag in the RAM 15 is “1” (step 804). As described later, the sound generation flag is set to “1” when musical tone data is generated by the sound source unit 31 in the sound source processing. If it is determined Yes in step 804, the CPU 12 outputs the received control event to the sound source unit 31 to instruct a change in the volume level (step 805).

  FIG. 9 is a flowchart showing an example of the sound source processing according to the present embodiment. The sound source process is executed in the sound source unit 31. When the sound source unit 31 receives a note event (step 901), the sound source process is activated, and the sound source unit 31 sets the sound generation flag in the RAM 15 to “1” (step 902). The sound source unit 31 reads waveform data from the ROM 14 according to the tone color indicated in the note-on event. Note that the speed at which the waveform data is read follows the pitch contained in the note-on event (step 903). Next, the sound source unit 31 reads the envelope data according to the timbre from the ROM 14 (step 904).

  Next, the sound source unit 31 determines whether there is an instruction to change the volume level from the CPU 12 (step 905). If it is determined Yes in step 905, the sound source unit 31 updates the volume level. The volume level may be stored in a storage device (for example, a register) inside the sound source unit 31 or may be stored in the RAM 15. Thereafter, the sound source unit 31 multiplies the data value of the waveform data, the data value of the envelope data, and the volume level to calculate the data value of the musical sound data and outputs it to the audio circuit 32 (step 907). Thereby, a musical sound having a predetermined volume is generated from the speaker 35.

  The sound source unit 31 determines whether the data value of the envelope data has become “0” (step 908). If it is determined No in step 908, the process returns to step 903. On the other hand, when it is determined Yes in step 908, the sound source unit 31 resets the sound generation flag in the RAM 15 to “0” (step 909) and ends the sound source processing.

  After the sound generation process (step 704), the CPU 12 executes a parameter communication process (step 705). In the parameter communication processing, for example, the tone of the musical tone to be generated set in the switch processing (step 702) is transmitted from the infrared communication device 33 to the performance device main body 11 via the I / F 13 according to the instruction of the CPU 12. The In the performance apparatus main body 11, when the infrared communication device 24 receives the data, the CPU 21 receives the data via the I / F 27 and stores it in the RAM 26 (step 306 in FIG. 3).

  When the parameter communication process (step 705) ends, the CPU 12 executes another process, for example, an update of an image displayed on the screen of the display unit 16 (step 706).

  FIG. 12 is a graph showing an example of change in angular acceleration due to rotation around the axis of the performance apparatus main body after the musical sound is started to be generated. In FIG. 12, t = 0 corresponds to the timing when the musical sound is started to be generated. In the graph 1001, the angular velocity sensor value increases from “0” to a positive value and returns to “0”. This shows that the performance device main body 11 has been rotated in the direction of arrow A (see FIG. 11) by the performer after the start of sound generation. In the graph 1002, the angular velocity sensor value decreases from “0” to a negative value and returns to “0”. This indicates that the performance device main body 11 has been rotated in the direction of arrow B (see FIG. 11) by the performer after the start of sound generation. Further, the graph 1003 shows that the performer rotates the performance device main body 11 alternately in the order of the A direction and the B direction.

  FIG. 13 is a graph showing an example of a change in volume level corresponding to a certain angular velocity change. As indicated by a graph 1301 of angular velocity sensor values in FIG. 13A, the volume level graph (reference numeral 1311 in FIG. 13) increases from the initial level Vi as the angular velocity changes positively. Also, the volume level never exceeds the maximum value Vmax.

  According to the present embodiment, the CPU 21 of the performance device main body 11 acquires a new volume level of the generated musical sound based on the change of the angular velocity sensor value accompanying the rotation of the performance device main body 11 about the longitudinal axis. Then, a control event including a new volume level is transmitted to the sound source unit 19. Accordingly, the performer shakes the performance apparatus main body 11 to start sound generation, and then rotates the wrist to rotate the performance apparatus main body 11 about the longitudinal axis so that the sound volume level is as desired. Can be changed.

  In the present embodiment, the CPU 21 increases the volume level when the performance device body 11 is rotated in the first direction around the longitudinal axis, and the first level around the longitudinal axis. When rotated in a second direction opposite to the direction, the volume level is decreased. Thus, the performer can control the increase and decrease in the volume level as desired by changing the rotation direction of the performance apparatus main body 11.

  For example, in the present embodiment, the CPU 21 calculates the volume level increase amount based on the angular velocity sensor value when the performance device body 11 is rotated in the first direction around the longitudinal axis, and the second level is calculated. The volume level reduction amount is calculated based on the angular velocity sensor value when rotated in the direction of. Thereby, the change of the volume level according to the sharpness of the rotation around the axis of the performance apparatus main body 11 can be realized.

  Furthermore, according to the present embodiment, the acceleration sensor 23 is arranged on the performance apparatus main body 11 extending in the longitudinal direction for the performer to hold by hand. The CPU 21 of the performance device main body 11 gives a sound generation instruction (note-on event) to the sound source unit 31 that generates a predetermined musical sound. The CPU 21 uses the timing at which the acceleration sensor value of the acceleration sensor 23 exceeds the predetermined first threshold value α and then becomes smaller than the second threshold value β, which is smaller than the first threshold value, as a sound generation timing, and takes note-on events. Is generated, and the instrument unit 19 is instructed to generate sound. Therefore, a musical sound can be generated at the moment when the player strikes the virtual drum surface with a stick.

  In the present embodiment, the CPU 21 calculates the initial volume level according to the maximum value of the acceleration sensor value. Therefore, the initial volume level at the sound generation timing is determined according to the sharpness of the player's swing, and the musical sound at the volume level can be generated.

  Next, a second embodiment of the present invention will be described. In the first embodiment, the volume is changed based on the angular velocity due to the rotation of the performance apparatus body 11 about the axis. In the second embodiment, the volume is changed based on the displacement (angle) due to the rotation of the performance apparatus main body 11 around the axis. FIG. 14 is a flowchart showing an example of processing executed in the performance device main body according to the second embodiment of the present invention. 14, steps 1401 to 1403 are the same as steps 301 to 303 in FIG.

  When step 1403 ends, the CPU 21 calculates the displacement θ from the reference position about the axis of the performance device main body 11 (step 1404). As will be described later, in the present embodiment, in the sound generation timing detection process (FIG. 15), the angular velocity sensor value when the note-on event is generated is acquired as the angular velocity sensor value ωref of the reference position (FIG. 15). At the same time, the acquisition time of the angular velocity sensor value at the reference position is stored in the RAM (see step 1501). Therefore, for example, depending on the difference value between the angular velocity sensor value ω acquired in step 1403 and the angular velocity sensor value ωref at the reference position, and the elapsed time from the acquisition time of the angular velocity sensor value at the reference position, A displacement (rotation angle) θ indicating how much the axis has been rotated around the axis can be acquired. As described above, the displacement (rotation angle) θ around the axis of the performance apparatus main body 11 is used. With respect to this angle θ as well, the left rotation displacement (rotation angle) θ is positive and the right rotation displacement (rotation angle) θ is negative as viewed from the front end side of the performance apparatus main body.

  After step 1404, the CPU 21 executes a sound generation timing detection process. FIG. 15 is a flowchart illustrating an example of sound generation timing detection processing according to the second embodiment. In FIG. 15, steps 1501 to 1508 are the same as steps 401 to 408 in FIG. 4. In FIG. 15, after the note-on event generation process (see step 1508 and FIG. 5) is completed and the note-on event is transmitted to the musical instrument unit 19, the CPU 21 acquires the angular velocity sensor value and uses it as the reference position. The angular velocity sensor value ωref is stored in the RAM 26 (step 1509). Further, the CPU 21 stores the acquisition time of the angular velocity sensor value ωref at the reference position in the RAM 26 (step 1510). The angular velocity sensor value ωref at the reference position and the acquisition time thereof are used for calculating the displacement (rotation angle) around the axis of the performance apparatus main body after the sound generation is started.

  After the sound generation timing detection process (step 1406), the CPU 21 executes a volume level change process (step 1407). FIG. 16 is a flowchart illustrating an example of a volume level changing process according to the second embodiment. As shown in FIG. 16, in the volume level change process, the CPU 21 reads the previous acquired value θp, which is the displacement in the previous volume level change process, stored in the RAM 26 (step 1601). Next, the CPU 21 compares the previous acquired value θp with the displacement θ calculated in step 1404 and determines whether these values do not match (step 1602). If NO in step 1602, that is, if these values match, the volume level changing process is terminated.

If YES in step 1602, a volume level displacement ΔLev based on the displacement θ is calculated (step 1603). As described above, when the counterclockwise rotation is performed around the axis of the performance apparatus main body 11, the displacement θ is positive, and therefore ΔLev> 0. On the other hand, when it is rotated clockwise around the axis of the performance apparatus main body 11, since the displacement θ is negative, ΔLev <0. For example, ΔLev can be obtained as follows.
ΔLev = c · θ (where c is a predetermined positive coefficient)

  Next, the CPU 21 calculates Vel + ΔLev as a new volume level Vel (step 1604). If Vel + ΔLev ≧ Vmax, the new volume level is Vmax. The CPU 21 generates a control event including a change in volume level and a new volume level (step 1605). The CPU 21 outputs the generated control event to the I / F 27 (step 1606). The I / F 27 causes the infrared communication device 24 to transmit a control event as an infrared signal. An infrared signal from the infrared communication device 24 is received by the infrared communication device 33 of the musical instrument unit 19. Thereafter, the CPU 21 stores the displacement θ as the previous acquired value θp in the RAM 26 (step 1607).

  In the second embodiment, the CPU 21 calculates the amount of increase in the volume level based on the displacement when the performance device main body 11 is rotated in the first direction around the longitudinal axis, and the second direction. The amount of decrease in the sound volume level is calculated on the basis of the displacement when it is rotated. Thereby, the change of the volume level according to the magnitude of the rotation around the axis of the performance apparatus main body 11 can be realized.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  In the embodiment, the CPU 21 of the performance device main body 11 detects an acceleration sensor value when the performer shakes the performance device main body 11, and detects a sound generation timing based on the acceleration sensor value. Thereafter, the CPU 21 of the performance device main body 11 generates a note-on event at the above sound generation timing and transmits it to the musical instrument unit 19 via the I / F 27 and the infrared communication device 24. On the other hand, when the instrument unit 19 receives a note-on event, the CPU 12 outputs the received note-on event to the sound source unit 31 to generate a musical sound. The above configuration is suitable when the musical instrument unit 19 is not a dedicated machine for generating musical sounds, such as a personal computer or game machine to which a MIDI board or the like is attached.

  However, the processing in the musical instrument main body 11 and the sharing of the processing in the musical instrument unit 19 are not limited to those in the above embodiment.

  For example, the performance device main body 11 may be configured to acquire the acceleration sensor value and the displacement from the reference position and transmit the acquired acceleration sensor value to the musical instrument unit 19. In this case, the sound generation timing detection process (FIG. 4), the note-on event generation process (FIG. 5), and the volume level change process (FIG. 6) are executed in the instrument unit 19. The configuration described above is suitable for an electronic musical instrument in which the musical instrument unit 19 is a dedicated machine for generating musical sounds.

  In the present embodiment, the performance device main body 11 and the musical instrument unit 19 are communicated with infrared signals using infrared communication devices 24 and 33. However, the present invention is not limited to this. Absent. For example, the percussion instrument main body 11 and the musical instrument unit 19 may perform data communication by other wireless communication, or may be configured to perform data communication by wire using a wire cable.

  Further, in the embodiment, the CPU 21 of the performance apparatus main body 11 has an acceleration sensor value that exceeds a predetermined first threshold value α and then becomes smaller than a second threshold value β that is smaller than the first threshold value. The musical instrument unit 19 is instructed to generate a sound with the generated timing as the sound generation timing. However, the sound generation timing is not limited to that described above, and the sound generation timing may be set when the acceleration sensor value reaches the maximum value or when a predetermined time elapses after reaching the maximum value.

10 Electronic Musical Instrument 11 Performance Device Body 12 CPU
13 I / F
14 ROM
15 RAM
16 Display Unit 17 Input Unit 18 Sound System 19 Musical Instrument Unit 21 CPU
22 Angular velocity sensor 23 Acceleration sensor 24 Infrared communication device 25 ROM
26 RAM
27 I / F
31 Sound Source 32 Audio Circuit 33 Infrared Communication Device

Claims (7)

A longitudinally extending retaining member for the performer to hold by hand;
An acceleration sensor disposed in the holding member;
An angular acceleration sensor for detecting angular acceleration accompanying rotation of the holding member about the longitudinal axis;
Control means for giving a sound generation instruction to a music sound generating means for generating a predetermined music sound,
A sounding instruction means for giving a sounding instruction to the music sound generating means at a sounding timing acquired based on the acceleration sensor value;
After reaching the sound generation timing, a new volume level of the sounded tone is acquired based on a change in the angular velocity sensor value detected by the angular velocity sensor, and the new volume level is obtained with respect to the tone generation means. And a volume level change instructing means.   When the holding member is rotated in the first direction around the longitudinal axis based on the angular velocity sensor value, the volume level change instructing means increases the volume level, and the longitudinal axis 2. The performance according to claim 1, wherein the new volume level is acquired so as to decrease the volume level when rotated around in a second direction opposite to the first direction. apparatus.   The volume level change instructing unit calculates an increase amount of the volume level based on the angular velocity sensor value when the holding member is rotated in the first direction around the longitudinal axis, and the holding member 3. The performance apparatus according to claim 2, wherein the amount of decrease in the volume level is calculated based on the angular velocity sensor value when rotated in the second direction around the longitudinal axis.   The volume level change instruction means calculates a displacement from the position of the holding member at the sounding timing based on the angular velocity sensor value when the holding member is rotated about the longitudinal axis, and the holding member The amount of increase in the volume level is calculated based on the displacement of the holding member rotated in the first direction around the longitudinal axis, and the holding member is rotated in the second direction around the longitudinal axis. 3. The performance device according to claim 2, wherein the amount of decrease in the volume level is calculated based on the displacement at the time.   The sound generation instructing means uses the timing at which the acceleration sensor value exceeds a predetermined first threshold value and then becomes smaller than a second threshold value that is smaller than the first threshold value as a sound generation timing. 4. The performance device according to claim 1, wherein a sounding instruction is given to the performance device.   6. The performance apparatus according to claim 1, wherein the sound generation instruction unit detects a maximum value of the acceleration sensor value and calculates an initial volume level according to the maximum value. . The performance device according to any one of claims 1 to 6,
A musical instrument unit comprising the musical sound generating means,
An electronic musical instrument, wherein each of the performance device and the musical instrument unit includes a communication unit.

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