JP2012032681A - Performance device and electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a change in a musical sound as a player desires by a motion of shaking a stick-like component in certain period of time in a performance device.SOLUTION: A performance device main body 11 extending along a longitudinal direction to be hand-held by a player is provided with an acceleration sensor 23 and an angular velocity sensor 22 that detects angular velocity around an axis in the longitudinal direction. A CPU 21 of the performance device main body 11 detects a timing for generating musical sound based on an acceleration sensor value of the acceleration sensor 23. Based on an angular velocity sensor value ω of the angular velocity sensor 22, the CPU 21 obtains a predetermined value which is a rotation angle around an axis of the performance device main body 11 at a period of time from a first timing corresponding to a start of shaking the performance device main body 11 to a second timing corresponding to an end of the shaking and whose absolute value is a maximum value. The CPU 21 calculates rise and fall in a sound volume level and a corrected value of the rise and fall according to a direction and an extent of a rotation based on the predetermined value, and corrects the sound volume level of a musical sound to be produced.

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. In the apparatus disclosed in Patent Document 2, the musical sound to be changed is determined at the start of the performance, that is, at the time when the stick-shaped member is swung.

  It is an object of the present invention to provide a performance device and an electronic musical instrument that can realize a desired change in musical tone by a performer with an operation for a certain period of time while waving a stick-shaped member.

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 velocity sensor for detecting an angular velocity associated with the rotation of the holding member around 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;
A rotation angle around the axis is calculated based on the change in the angular velocity sensor value, and the period until the acceleration sensor value increases to reach a predetermined first value and then decreases to reach a predetermined second value A first rotation angle calculating means for detecting a predetermined value which is a rotation angle around the axis and whose absolute value indicates a maximum value;
Based on the predetermined value, it is achieved by a performance device comprising: a sound volume level calculating means for calculating a sound volume level of the musical sound to be sounded and giving the calculated sound volume level to the sound generation instruction means. The

Further, the object of the present invention is to provide a holding member extending in the longitudinal direction for the performer to hold by hand,
An acceleration sensor disposed in the holding member;
A triaxial magnetic sensor for detecting magnetic sensor values of three orthogonal axes according to a direction in which the holding member is directed;
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;
A rotation angle around the axis is calculated based on the change in the magnetic sensor value, and the acceleration sensor value increases to reach a predetermined first value, and then decreases to reach a predetermined second value. Second rotation angle calculation means for detecting a predetermined value, which is a rotation angle around the axis in a period and whose absolute value indicates a maximum value;
Based on the predetermined value, it is achieved by a performance device comprising: a sound volume level calculating means for calculating a sound volume level of the musical sound to be sounded and giving the calculated sound volume level to the sound generation instruction means. The

  In a preferred embodiment, the sound volume level calculating means increases the sound volume level from a predetermined reference value when rotation about the axis indicates rotation in one direction based on the predetermined value, and When the rotation around the axis indicates rotation in the other direction, the volume level is decreased from the predetermined reference value.

  In a more preferred embodiment, the sound volume level calculating means is configured so that the predetermined reference value increases from the predetermined reference value as the absolute value of the predetermined value increases when rotation about the axis indicates rotation in the one direction. The volume level is calculated so that the amount of increase increases, and when the rotation around the axis indicates rotation in the other direction, the absolute value of the predetermined value increases from the predetermined reference value. The sound volume level is calculated so that the amount of decrease in the sound volume increases.

  In another 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 predetermined first value is the first threshold value, and the predetermined second value is the second threshold 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 by the operation | movement of the fixed period which is shaking the stick-shaped member.

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 diagram schematically showing the appearance of the performance device main body according to the present embodiment. FIG. 4 is a flowchart showing an example of processing executed in the performance apparatus main body according to the present embodiment. FIG. 5 is a flowchart showing an example of the sound generation timing detection process according to the present embodiment. FIG. 6 is a flowchart showing an example of note-on event generation processing 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 graph schematically showing an example of the acceleration sensor value detected by the acceleration sensor of the performance apparatus main body. FIG. 9 is a flowchart illustrating an example of processing executed in the performance device main body according to the second embodiment. FIG. 10 is a flowchart illustrating an example of sound generation timing detection processing 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, the infrared communication device 24 is provided at the end of the performance device main body 11 on the base side (see reference numeral 211 in FIG. 2), and the 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 note event received via the I / F 13, the tone generation state 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 device main body 11 has an angular velocity sensor 22 and an acceleration sensor 23 on the tip side (see reference numeral 212) opposite to the base side (see reference numeral 211) held by the performer. The position of the angular velocity sensor 22 is not limited to the tip side, and may be arranged on the root side. The angular velocity sensor 22 is, for example, a sensor having a gyroscope, and can detect an angular velocity in rotation (refer to reference numeral 201) around the longitudinal axis (refer to reference numeral 200 in FIG. 2) of the performance apparatus main body 11. it can. 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 direction (: longitudinal axis: reference numeral 200) of the performance device main body 11.

  When the performer actually plays the drum, the player holds one end (base side 211) of the stick in his hand and causes the stick to rotate about the wrist or the like. Therefore, in this embodiment, an acceleration sensor value in the direction of the axis 200 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. In the present embodiment, the angular velocity sensor 22 acquires the displacement (rotation angle) around the axis 200 of the performance apparatus body 11.

  FIG. 3 is a diagram schematically showing the appearance of the performance device main body according to the present embodiment. In FIG. 3, the performance device main body 11 is drawn with the base side (see reference numeral 211) at the back and the front end side (see reference numeral 212) at the front. As shown in FIG. 3, the angular velocity ω at the time of counterclockwise rotation (counterclockwise rotation: see arrow A) as viewed from the front end side 211 is positive. On the other hand, the angular velocity ω at the time of clockwise rotation (clockwise rotation: see arrow B) as viewed from the tip side 211 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. Similarly, with respect to the displacement (rotation angle) θ around the axis 200 of the performance apparatus main body 11, the displacement θ when rotating counterclockwise (counterclockwise rotation: see arrow A) as viewed from the front end side 211 is positive and right rotation. The displacement θ at (arrow B) is negative. In the present embodiment, as will be described later, with respect to the displacement (rotation angle) about the axis 200, the volume level increases when the predetermined value θmax indicating the maximum absolute value is positive, and the predetermined value θmax is increased. The volume level decreases when is negative.

  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 acquires the acceleration sensor value and the angular velocity sensor value in the performance device main body 11, detects the tone generation timing of the musical sound according to the acceleration sensor value, generates the note-on event, calculates the volume level correction value according to the angular velocity sensor value, Processing such as transmission control of a note-on event via the I / F 27 and the infrared communication device 24 is executed.

  The ROM 25 acquires the acceleration sensor value and the angular velocity sensor value in the performance device main body 11, detects the tone generation timing of the musical sound according to the acceleration sensor value, generates the note-on event, and calculates the volume level correction value according to the angular velocity sensor value. , A processing program such as note-on event transmission control via the I / F 27 and the infrared communication device 24 is 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. 4 is a flowchart showing an example of processing executed in the performance apparatus main body according to the present embodiment. As shown in FIG. 4, the CPU 21 of the performance device main body 11 executes an initialization process including clearing of data in the RAM 26 (step 401). When the initialization process (step 401) ends, the CPU 21 acquires the sensor value (acceleration sensor value) of the acceleration sensor 23 and stores it in the RAM 26 (step 402). As described above, in the present embodiment, the sensor value in the direction of the axis 200 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 403).

  Next, the CPU 21 executes a sound generation timing detection process (step 404). FIG. 5 is a flowchart showing an example of the sound generation timing detection process according to the present embodiment. As shown in FIG. 5, the CPU 21 reads the acceleration sensor value and the angular velocity sensor value ω stored in the RAM 26 (step 501). Next, the CPU 21 determines whether the acceleration sensor value is larger than a predetermined first threshold value α (step 502). If it is determined Yes in step 502, the CPU 21 determines whether the acceleration flag in the RAM 26 is “0” (step 503). When it is determined Yes in step 503, the CPU 21 sets “1” in the acceleration flag in the RAM 26 (step 504). Further, the CPU 21 initializes the rotation angle θ to “0” (step 505).

  In the case of No in step 503 or after step 505, the CPU 21 calculates the displacement Δθ around the axis 200 based on the angular velocity sensor value ω (step 506). This displacement Δθ can be calculated using, for example, the time difference Δt between the previous calculation time of the displacement Δθ and the current calculation time of the displacement Δθ, and the angular velocity sensor value ω. The CPU 21 adds the displacement Δθ calculated in step 505 to the rotation angle θ (step 507). As described above, Δθ is positive and right rotation (clockwise rotation: clockwise rotation in FIG. 2) when the performance apparatus main body 11 is rotated counterclockwise when viewed from the front end side 211 (counterclockwise rotation: see arrow A in FIG. 2). Δθ in the case of arrow B) is negative.

  Further, the CPU 21 determines whether or not the calculated absolute value of the rotation angle θ is larger than the absolute value of the predetermined rotation angle θmax stored in the RAM 26 (step 508). The predetermined value θmax indicates a value having the maximum absolute value, and may be a negative value. If it is determined Yes in step 508, the CPU 21 stores θ as θmax in the RAM 26 (step 509). That is, θmax is rewritten to a rotation angle whose absolute value indicates the maximum value.

  If it is determined No in step 502, the CPU 21 determines whether the acceleration flag in the RAM 26 is “1” (step 510). If it is determined No in step 510, the sound generation timing detection process is terminated. When it is determined Yes in step 510, the CPU 21 determines whether the acceleration sensor value is smaller than a predetermined second threshold value β (step 511). If it is determined No in step 511, the process proceeds to step 506. If it is determined Yes in step 511, the CPU 21 executes a note-on event generation process (step 512).

  FIG. 6 is a flowchart showing an example of note-on event generation processing according to the present embodiment. The note-on event is transmitted to the musical instrument unit 19 by the note-on event generation process shown in FIG. 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. 8 is a graph schematically showing an example of the acceleration sensor value detected by the acceleration sensor of the performance apparatus 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 801 in the curve 800 in FIG. 8). 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 802). 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.

In the present embodiment, the timing when the acceleration sensor value increases and becomes larger than the first threshold value α (time t _α ), and the timing when the acceleration sensor value decreases and becomes smaller than the second threshold value β. During the period T with (time tβ), the volume level of the musical sound to be generated is adjusted based on θmax, the absolute value of which is the maximum value of the rotation angle θ around the axis 200 of the performance device main body 11.

As shown in FIG. 6, in the note-on event generation process, the CPU 21 acquires the initial value of the volume level stored in the RAM 26 (step 601). Next, the CPU 21 calculates the volume level correction value ΔLev based on the predetermined value θmax of the rotation angle stored in the RAM 26 (step 602). For example, ΔLev can be obtained as follows.
ΔLev = b · θmax (where b is a predetermined positive coefficient)

  If the predetermined value θmax is positive, ΔLev is also positive, and if the predetermined value θmax is negative, ΔLev is also negative. The CPU 21 adds the volume level correction value ΔLev to the initial value of the volume level, and sets the added value as the volume level Vel (step 603). Note that when the initial value of the volume level + ΔLev ≧ Vmax (Vmax: the maximum value of the volume level), the volume level Vel is Vmax. Thereby, the value of the volume level Vel is increased or decreased in consideration of the rotation of the performance device main body 11 around the axis 200 by the performer.

  The CPU 21 generates a note-on event including information indicating the calculated volume level (velocity) and a predetermined tone color (step 604). 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 605). 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 606).

  When the sound generation timing detection process (step 404) ends, the CPU 21 executes a parameter communication process (step 405). The parameter communication process (step 405) 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 images displayed 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). In the sound generation process, the CPU 21 gives a note-on event received by the I / F 13 and stored in the RAM 26 to the sound source unit 31 to instruct sound generation.

  When receiving the note-on event, the sound source unit 31 reads waveform data from the ROM 14 according to the timbre indicated by the note-on event. The speed at the time of waveform data reading depends on the pitch included in the note-on event. Next, the sound source unit 31 multiplies the volume level included in the note-on event and the waveform data to generate musical sound waveform data having a predetermined volume level. The generated musical sound waveform data is output to the audio circuit 32. Thereby, a musical sound having a predetermined volume is generated from the speaker 35.

  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 405 in FIG. 4).

  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).

  In the present embodiment, using the angular velocity sensor value ω, a period T from a predetermined first timing corresponding to the start of swinging of the performance apparatus body 11 to a predetermined second timing corresponding to the end of descending. , A predetermined value θmax indicating that the absolute value of the rotation angle around the axis of the performance apparatus main body 11 is the maximum value is acquired. The CPU 21 of the performance device main body 11 calculates the direction and magnitude of rotation according to the predetermined value θmax, and based on this, calculates the increase / decrease of the volume level and the correction value of the increase / decrease, thereby correcting the volume level. According to the present embodiment, it is possible to generate a musical tone having a desired volume level for the performer according to the twist of the performer's wrist.

  Further, in the present embodiment, the CPU 21 rotates in one direction (reference numeral A in FIG. 2), with respect to the rotation angle around the axis 200 of the performance device main body 11, the predetermined value θmax indicating the maximum absolute value. Is indicated, the sound volume level is increased, and when the rotation in the other direction (reference numeral B in FIG. 2) is indicated, the sound volume level is decreased. Thereby, the performer can implement | achieve increase / decrease in a desired volume according to the direction of twist of a wrist.

  Further, in the present embodiment, when the predetermined value θmax indicates a direction toward one rotation, the CPU 21 increases the volume so that the amount of increase from the predetermined reference value increases as the absolute value increases. The level is calculated, and when the predetermined value θmax indicates the direction of the other rotation, the volume level is calculated so that the amount of decrease from the predetermined reference value increases as the absolute value increases. Thus, the performer can adjust the level of increase / decrease in volume as desired according to the amount of wrist twist.

  Further, in the present embodiment, the CPU 21 determines that the acceleration sensor value of the acceleration sensor 23 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. Using the timing as the sound generation timing, a note-on event is generated, and a sound generation instruction is given to the instrument unit 19. 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 predetermined first value is the first threshold value, the second value is the second threshold value, and the acceleration sensor value is increased so that the first threshold value α The volume is corrected on the basis of a predetermined value θmax in which the absolute value of the displacement (rotation angle) indicates the maximum value in a period from when the value reaches the second threshold β until the second threshold value β is reached. Therefore, it is possible to realize a change in volume level based on wrist twisting by the performer during the period from the start of swinging by the performer to the stop thereof.

  Next, a second embodiment of the present invention will be described. In the first embodiment, the angular velocity sensor 22 is arranged in the performance device main body 11, and the rotation angle around the axis of the performance device main body 11 is acquired based on the angular velocity sensor value ω of the angular velocity sensor 22. In the second embodiment, instead of the angular velocity sensor 22, a three-axis (three-dimensional) magnetic sensor is arranged in the performance apparatus body 11, and the performance apparatus body 11 rotates around the axis based on the magnetic sensor value. A corner is acquired.

  In FIG. 2, the triaxial magnetic sensor can be arranged at the same position as the angular velocity sensor 22. Of course, the arrangement position of the magnetic sensor may be not the front end side 212 of the performance device main body 11 but the root side 211. The three-axis magnetic sensor is, for example, the X-axis, X-axis parallel to the circuit board on which the direction of the axis 200 of the performance apparatus body 11 is perpendicular to the Y-axis and the Y-axis, and the magnetic sensor of the performance apparatus body 11 is attached. Magnetic sensor values (X, Y, Z) can be acquired for each of the Z axis perpendicular to the axis and the Y axis.

  FIG. 9 is a flowchart illustrating an example of processing executed in the performance device main body according to the second embodiment. 9, steps 901 and 902 correspond to steps 401 and 402 in FIG. When step 902 ends, the CPU 21 acquires a triaxial magnetic sensor value (X, Y, Z) from the magnetic sensor and stores it in the RAM 26 (step 903). When step 903 is completed, the CPU 21 executes a sound generation timing detection process (step 903). FIG. 10 is a flowchart illustrating an example of sound generation timing detection processing according to the second embodiment.

  As shown in FIG. 10, the CPU 21 reads the acceleration sensor value and the triaxial magnetic sensor value stored in the RAM 26 (step 1001). Next, the CPU 21 determines whether or not the acceleration sensor value is larger than a predetermined first threshold value α (step 1002). If it is determined Yes in step 1002, the CPU 21 determines whether the acceleration flag in the RAM 26 is “0” (step 1003). If it is determined Yes in step 503, the CPU 21 sets “1” in the acceleration flag in the RAM 26 (step 1004). Further, the CPU 21 acquires the initial value of the triaxial magnetic sensor value (triaxial magnetic sensor initial value (X0, Y0, Z0)) from the magnetic sensor, and stores it in the RAM 26 (step 1005).

  Next, the CPU 21 calculates the rotation angle θ around the axis 200 of the musical instrument main body 11 based on the triaxial magnetic sensor values (X, Y, Z) and the triaxial magnetic sensor initial values (X0, Y0, Z0) ( Step 1006). The CPU 21 determines whether or not the calculated absolute value of the rotation angle θ is larger than the absolute value of the predetermined rotation angle θmax stored in the RAM 26 (step 1007). If it is determined Yes in step 1007, the CPU 21 stores θ as θmax in the RAM 26 (step 1008). That is, θmax is rewritten to the rotation angle whose absolute value is the maximum value.

  If it is determined Yes in step 1002, the CPU 21 determines whether the acceleration flag in the RAM 26 is “1” (step 1009). If it is determined No in step 1009, the sound generation timing detection process is terminated. If it is determined Yes in step 1009, the CPU 21 determines whether the acceleration sensor value is smaller than a predetermined second threshold value β (step 1010). If it is determined No in step 1007, the process proceeds to step 1006.

  When it is determined Yes in step 1010, the CPU 21 executes a note-on event generation process (step 1011). The note-on event generation process is the same as that in the first embodiment (FIG. 6). By the note-on event generation process, a note-on event including a volume level and the like is generated and transmitted to the instrument unit 19.

  In the second embodiment, using the magnetic sensor value of the three-axis magnetic sensor, from a predetermined first timing corresponding to the start of swinging of the performance apparatus main body 11, a predetermined second corresponding to the end of descending. In a period T up to the timing, a predetermined value θmax indicating the maximum absolute value of the rotation angle around the axis of the performance apparatus main body 11 is acquired. The CPU 21 of the performance device main body 11 calculates the direction and magnitude of rotation according to the predetermined value θmax, and based on these, calculates the increase / decrease of the volume level and the correction value of the increase / decrease, thereby correcting the volume level. According to the present embodiment, it is possible to generate a musical tone having a desired volume level for the performer according to the twist of the performer's wrist.

  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 an acceleration sensor value and an angular velocity sensor value or a triaxial magnetic sensor value and transmit them to the musical instrument unit 19. In this case, the sound generation timing detection process (FIG. 5) and the note-on event generation 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. In the embodiment, the two timings that define the period for detecting the rotation angle at which the absolute value of the rotation angle is the maximum value are not limited to those described above, and other acceleration sensor values by the acceleration sensor May be adopted.

  In the above embodiment, in order to calculate the volume level correction value ΔLev, the predetermined value θmax of the rotation angle is multiplied by a predetermined positive coefficient. However, the present invention is not limited to this, and the RAM 26 stores a volume correction table in which the range of the predetermined value θmax and the volume level correction value ΔLev are associated with each other, and the CPU 21 performs the corresponding ΔLev based on the predetermined value θmax. You may comprise so that it may acquire.

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 velocity sensor for detecting an angular velocity associated with the rotation of the holding member around 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;
A rotation angle around the axis is calculated based on the change in the angular velocity sensor value, and the period until the acceleration sensor value increases to reach a predetermined first value and then decreases to reach a predetermined second value A first rotation angle calculating means for detecting a predetermined value which is a rotation angle around the axis and whose absolute value indicates a maximum value;
A performance apparatus comprising: a volume level calculating unit that calculates a volume level of the musical sound to be generated based on the predetermined value and gives the calculated volume level to the sound generation instruction unit. A longitudinally extending retaining member for the performer to hold by hand;
An acceleration sensor disposed in the holding member;
A triaxial magnetic sensor for detecting magnetic sensor values of three orthogonal axes according to a direction in which the holding member is directed;
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;
A rotation angle around the axis is calculated based on the change in the magnetic sensor value, and the acceleration sensor value increases to reach a predetermined first value, and then decreases to reach a predetermined second value. Second rotation angle calculation means for detecting a predetermined value, which is a rotation angle around the axis in a period and whose absolute value indicates a maximum value;
A performance apparatus comprising: a volume level calculating unit that calculates a volume level of the musical sound to be generated based on the predetermined value and gives the calculated volume level to the sound generation instruction unit.   The volume level calculating means increases the volume level from a predetermined reference value based on the predetermined value, when rotation around the axis indicates rotation in one direction, and rotation around the axis The performance device according to claim 1 or 2, wherein when the rotation in the other direction is indicated, the volume level is decreased from the predetermined reference value.   When the rotation around the axis indicates the rotation in the one direction, the volume level calculation means increases the amount of increase from the predetermined reference value as the absolute value of the predetermined value increases. When the rotation level around the axis indicates rotation in the other direction, the amount of decrease from the predetermined reference value increases as the absolute value of the predetermined value increases. 4. The performance device according to claim 3, wherein the volume level is calculated.   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. 5. The performance apparatus according to claim 1, wherein an instruction for sound generation is given to the performance apparatus.   6. The performance device according to claim 5, wherein the predetermined first value is the first threshold value, and the predetermined second value is the second threshold 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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