JP2003108120A - Musical sound controller, signal processor, and electronic percussion instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a percussion sound by detecting style of rendition of a closed rim shot and an open rim shot by suppressing the number of output lines from percussion parts of an electronic percussion instrument. SOLUTION: A piezoelectric element (i) of a percussion detection part 1 detects a head being hit. A 1st rim shot switch 11 (SW1) is provided at a distance from a player of rims and a 2nd rim shot switch 12 (SW2) is provided close to the player. The percussion detection part 1 and a musical sound control part 2 are connected with a stereo cable 3. The voltage of a 1st output line 31 when the SW1 is ON is made different from the voltage of the 1st output line when the SW2 is ON by using a resistor R1, and the 1st output line 31 of one series detects the operations of the SW1 and SW2. The closed rim shot is judged when the SW1 is ON and the open rim shot is judged when the SW2 is ON (SW1 is OFF).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tone control device and signal processing for outputting the output signals of a plurality of switches through one series of output lines and controlling the operation of a plurality of switches based on the output signals. The present invention relates to a device and an electronic percussion instrument.

[0002]

2. Description of the Related Art Conventionally, an electronic percussion instrument (electronic drum) is provided with a head sensor for detecting a hit on a head and a rim sensor for detecting a hit on a rim portion, and outputs of the respective sensors are signals of two lines. What is processed as is disclosed in Japanese Patent Application Laid-Open No. 6-175651. Also, 1
There is one that includes one film switch and one piezoelectric element, and expresses a tone color corresponding to a hit detected by the piezoelectric element, into two tone colors when one film switch is pressed and when it is not pressed.

FIG. 19 is a diagram showing an example of a circuit configuration of this conventional electronic percussion instrument. The hit detection unit 100 is, for example, a snare-type sensor device having a rim portion and a head. The head has a piezoelectric element 110 and the rim portion 1
Two rim shot switches 120 are provided. The musical tone control unit 200 is a controller that generates a musical tone signal, and includes an amplification / rectification integration circuit (envelope extraction circuit) 210.
And an inverter 220 with a Schmitt trigger (threshold value 0.6 V). The hit detection unit 100 and the musical sound control unit 200 are connected by a stereo cable 300.

The piezoelectric element 110 outputs a vibration waveform signal according to the impact strength on the head, and the vibration waveform signal of the piezoelectric element 110 is amplified by an amplification / rectification integration circuit 210.
After rectification and integration, the envelope signal is not shown in A
It is input to the / D converter. Rim shot switch 120
Is normally OFF (open) and the inverter 220
When a predetermined voltage is input to the rim, the rim portion is hit to turn on (close) and the input side of the inverter 220 is grounded.

When only the head is hit, the rim shot switch 120 remains off, and the switch signal of "0" is input to the port of the CPU (not shown) via the inverter 220. As a result, under the control of the CPU, an impact sound based on the impact strength detected by the piezoelectric element 110 with the tone color for the head is generated. When the rim is hit, the rim shot switch 120 is turned on.
Then, the switch signal of "1" is input to the port via the inverter 220. As a result, under the control of the CPU, an impact sound based on the impact strength detected by the piezoelectric element 110 is produced with a timbre for the rim. The latter is one of the snare drum rim shot playing methods. A similar circuit was used even when the hit detection unit was a cymbal type, and it was possible to express the sound color of a normal cymbal and the sound color when the rim portion was hit.

[0006]

By the way, in the electronic percussion instrument of this kind, since the percussion detecting section provided with the switch is a section for detecting the vibration of the percussion, the musical tone control section is integrated with the percussion detecting section. Since there is a risk of breakage or damage due to a severe hit, the tone control section must be provided separately from the hit detection section and connected by a cable. As described above, in order to perform the signal processing of the signal from the switch arranged in the vibration system such as the hitting detection unit by the separate tone control unit, there is a problem in the wiring limitation of the cable.

Further, in the cymbal type, if another sensor is added to the rim part and the cup part to express three timbres of a normal cymbal tone, a rim striking tone and a cup striking tone, different sounds are required. Since the sensor of is added,
Naturally, wiring had to be added, and an INPUT terminal on the main body side (musical tone control section) was additionally required.

Further, as shown in FIG. 20, there are an open rim shot (FIG. 20 (A)) and a closed rim shot (FIG. 20 (B)) in the rim shot playing method of a snare drum or the like. Is pronounced. An open rim shot is usually performed by hitting the head and the front part of the rim near the player at the same time. On the other hand, a closed rim shot is performed by hitting the part of the rim that is far from the player while pressing the head surface with the hand holding the stick, but if the head is small, stick to the part of the rim that is close to the player. There is also a case where a portion of the rim portion which is far from the player is hit by pushing the vicinity of the grip portion.

However, the conventional electronic musical instrument cannot express such a difference between the open rim shot and the closed rim shot as different timbres. Also, even if it can be expressed, it is necessary to add another sensor, so that the number of switches increases and the output signals increase, wiring becomes complicated, and in the normal tone control unit, the INPUT terminal is used. There was a problem that it could not connect due to the limitation of.

Further, the open rim shot and the closed rim shot are controlled according to the striking strength (velocity) detected by the piezoelectric element, and the tone color of the closed rim shot is used for a weak rim shot, and the open rim shot is used for a strong rim shot. There were some shot tones, but they were unnatural and far from the actual performance, and there was a problem in terms of expressiveness, such as the inability to express particularly weak open rim shots.

Further, in the acoustic drum, the tone color of the snare or tom tom is adjusted at the drum portion. It is convenient if such an adjustment operation can be performed with an electronic percussion instrument using a volume controller or the like. Can only be performed by the sound source module (musical sound control unit) due to the limitation of the output line.

It is an object of the present invention to provide a musical tone control device capable of performing multifunctional musical tone control while suppressing the number of output lines. Another object of the present invention is to provide a signal processing device capable of distinguishing a plurality of switch signals and control signals from one line. Another object of the present invention is to provide an electronic percussion instrument capable of expressing accurate tones by applying the tone control device or the signal processing device.

[0013]

A musical tone control apparatus according to claim 1 of the present invention comprises a plurality of switches, an operation signal detecting means for outputting an operation signal according to an operation in an operation section, and an output signal of each switch. Resistance means for adding different resistances to the first and second output means for outputting the output signals of the respective switches in one series.
An output line, a second output line for outputting the operation signal of the operation signal detection means, and a voltage difference generated by the resistance means in the output signal of the first output line,
Identification means for identifying the switch operation of each switch,
Musical tone control means for controlling a musical tone based on the operation signal of the second output line and the switch operation of each of the identified switches.

In the musical tone control apparatus of the first aspect, the plurality of switches are rim shot switches or switches arranged under the keys, and the operation section is, for example, a head of an electronic percussion instrument or a key of a keyboard instrument. The operation signal is a vibration waveform signal when the head or the like is hit, a pressure signal (aftertouch signal) for pressing a key, or the like. Since it is possible to identify the switch operation of the plurality of switches only with the first output line of one series, it is possible to detect a plurality of rim shot playing styles on the drum, for example, and to control the percussion instrument sound according to the vibration waveform signal of the second output line. You can Further, since it is possible to detect the swing of the keys on the keyboard, it is possible to detect a rendition style such as vibrato, and it is possible to control the pronunciation of a musical sound according to the pressure signal of the second output line. Therefore, it is possible to suppress the number of output lines and perform multifunctional tone control. The detailed example of claim 1 is described in a first embodiment, a second embodiment, a third embodiment, a fourth embodiment, and a fifth embodiment, which will be described later.

A musical tone control apparatus according to a second aspect of the present invention has the configuration according to the first aspect, and the first output line and the second output line are configured by a two-core shielded cable or a three-core cable. Is characterized by.

According to the musical tone control apparatus of the second aspect, the same operational effect as that of the first aspect can be obtained, and for example, the percussion detection section of the electronic percussion instrument is provided to the musical tone control section with a two-core shielded cable such as a stereo cable or Since it can be connected with a 3-core cable, it is possible to use a conventional jack or a stereo cable of a sound source module as it is. In addition,
A detailed example of claim 2 is described in a first embodiment, a second embodiment, a third embodiment and a fourth embodiment which will be described later.

A signal processing apparatus according to a third aspect of the present invention comprises a plurality of switches, control means for outputting a control signal, and resistance means for adding different resistances to the output signals of the respective switches and the control signal of the control means. And an output line that outputs the output signal of each switch and the control signal of the control unit in one series, and the switch operation of each switch according to the voltage difference generated by the resistance unit in the output signal of the output line. And identification means for identifying the operation of the control means.

In the signal processing device according to the third aspect, the plurality of switches are, for example, rim shot switches of an electronic percussion instrument, and the control means is, for example, a volume controller or a rotary encoder provided in a percussion detector of the electronic percussion instrument. . Since the switch operation of the plurality of switches and the operation of the control means can be identified only by one series of the first output lines, for example, a plurality of rim shot rendition styles on the drum can be detected, and the control according to the operation of the control means can be performed. Since the signal can be detected by the musical sound control unit or the like, the tone color setting of the snare drum, the tom tom, or the like can be performed by the hit detection unit. Therefore, it is possible to suppress the number of output lines and perform multifunctional tone control. The detailed example of claim 3 is described in the second and third embodiments described later.

An electronic percussion instrument according to a fourth aspect of the present invention is a striking head, a rim disposed on the outer periphery of the head, and a striking portion for detecting a striking to the head and outputting a vibration waveform signal. A sensor, a plurality of switches arranged on or near the rim, resistance means for adding different resistances to the output signals of the respective switches, and first output of the output signals of the switches in one series A two-core shielded cable or a three-core cable having an output line and a second output line for outputting a vibration waveform signal of the impact sensor, and a voltage difference generated by the resistance means in the output signal of the first output line, Identification means for identifying the switch operation of each switch, and a music piece for controlling a musical sound of a percussion instrument based on the vibration waveform signal of the second output line and the identified switch operation. Characterized by comprising a control means.

In the electronic percussion instrument of claim 4, the percussion sensor is, for example, a piezo-type piezoelectric sensor or the like, and the plurality of switches are rim shot switches or the like. Since the switch operation of the plurality of switches can be identified only by the first output line of one series, it is possible to detect a plurality of rim shot playing styles,
It is possible to control the percussion instrument sound according to the vibration waveform signal of the second output line. Therefore, it is possible to suppress the number of output lines and perform multifunctional tone control. Further, since the hitting sensor and the plurality of switches can be connected to the musical tone control means by a two-core shielded cable such as a stereo cable or a three-core cable, the jack or the stereo cable of the conventional sound source module can be used as it is. The detailed example of claim 4 is described in the first embodiment, the second embodiment, the third embodiment and the fourth embodiment.

An electronic percussion instrument according to a fifth aspect of the present invention is a striking head, a rim disposed on the outer periphery of the head, and a striking portion for detecting a striking impact on the head and outputting a vibration waveform signal. A sensor, a plurality of switches arranged on or near the rim, control means for outputting a control signal, and a resistor for adding a different resistance to the output signal of each switch and the control signal of the control means. Means, and a two-core shielded cable having a first output line for outputting the output signal of each switch and a control signal of the control means in one series and a second output line for outputting a vibration waveform signal of the impact sensor, or Depending on the voltage difference generated by the resistance means in the output signal of the three-core cable and the first output line, And a control means for controlling the musical sound of the percussion instrument based on the vibration waveform signal of the second output line and the identified switch operation. Musical tone control means for adjusting the tone color assigned to the head based on the above.

In the electronic percussion instrument of the fifth aspect, the percussion sensor is, for example, a piezoelectric type piezoelectric sensor, and the plurality of switches are rim shot switches and the like. The control means is, for example, a volume controller or a rotary encoder provided near the rim. Since the switching operation of the plurality of switches can be identified only by the first output line of one series, a plurality of rim shot performances can be detected, and the percussion instrument sound according to the vibration waveform signal of the second output line can be controlled to be sounded. it can. Further, the operation of the control means can be identified only by the first output line of one series, and the tone control means adjusts the tone color to be assigned to the head based on the operation of the control means. Can be done in the vicinity. Therefore, it is possible to suppress the number of output lines and perform multifunctional tone control. Further, since the hit sensor, the plurality of switches and the control means can be connected to the musical tone control means by a two-core shielded cable such as a stereo cable or a three-core cable, the jack and the stereo cable of the conventional sound source module or the like can be used as they are. be able to. In addition,
Detailed examples of this claim 5 are described in the second and third embodiments.

[0023]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block configuration diagram of an electronic percussion instrument to which the signal processing device and the tone control device according to the embodiment are applied, and corresponds to Examples 1 to 4 described later. This electronic percussion instrument is composed of a hit detection unit 1 including a head and the like, and a musical sound control unit 2 provided in a sound source module and the like.
The hit detection unit 1 and the tone control unit 2 are connected by a stereo cable 3 which is a two-core shielded cable. Note that the common shield wire of the stereo cable 3 is not shown in FIG.

The hit detection section 1 is a first rim shot switch 11 for detecting a rim shot performance style as described later.
(SW1), second rim shot switch 12 (SW
2) and a piezoelectric element (striking sensor) i. The control means 13 shown by the broken line corresponds to the second and third embodiments described later, and the control means 13 adjusts the tone color assigned to the head. The tone control section 2 includes a signal detection section 21, an AMP half-wave rectification integration circuit (envelope extraction circuit) 22, an A / D converter 23, a CPU 24, a ROM 25, a RAM 26, a sound source 2.
7, a waveform memory 28, and a D / A converter 29.

The signal detector 21 detects ON / OFF of the rim shot switches 11 and 12 connected to the first output line 31 of the stereo cable 3 as described later, and a switch signal corresponding to each ON / OFF. To the port of the CPU 24. The amplifying rectifying / integrating circuit 22 includes a piezoelectric element i connected to the second output line 32 of the stereo cable 3.
The envelope signal (envelope) of the vibration waveform signal input from is detected and output to the A / D converter 23. The A / D converter 23 time-divisionally converts the input envelope signal into a digital signal, and inputs the digital signal to the port of the CPU 24. C
The PU 24 operates on the basis of a control program stored in the ROM 25, and uses the working area of the RAM 26 to control the tone generation.

Specifically, the CPU 24 detects the impact by the switch signals from the rim shot switches 11 and 12 and the vibration waveform signal output from the piezoelectric element i (envelope signal input from the A / D converter 23). A tone parameter required by the sound source 27 is generated and supplied to the sound source 27 based on the hitting position (playing method: normal head hitting or open rim shot or closed rim shot) in the section 1 and hitting strength. This tone parameter is a tone color parameter for designating a tone color (waveform data) according to the rendition style, velocity data for designating the volume, note-on data for instructing the start of sounding, and the like. Also, CPU2
Reference numeral 4 sets the tone color to be assigned to the head of the hit detection unit 1 and tone color adjustment data in the sound source 27.

The tone generator 27 sequentially reads the waveform data of the tone color designated by the tone color parameter from the waveform memory 28 according to the note-on data, performs volume control, effect control, etc., and converts the digital tone waveform signal into the D / A converter 29. Output to. The D / A converter 29 converts the digital musical tone waveform signal into an analog signal and outputs it to a sound system (not shown) including an amplifier and a speaker to generate a musical tone of a percussion instrument. In addition,
The generated musical sound is automatically attenuated according to the envelope.

(First Embodiment) FIGS. 3 and 4 show a first embodiment of the impact detection unit 1, FIG. 3 (A) is a sectional view, FIG. 3 (B) is a top view, and FIG. 4 is a rear view. Is. The hitting detection unit 1 of the first embodiment is an example of a snare type, and the head f is covered on the open end (upper part) of the bottom case e and is fixed by the outer edge ring d. A rim c is joined to the bottom case e by a screw g around the head f and above the outer edge ring d. Above the rim c, the above-mentioned first rim shot switch 11 (SW1) and second rim shot switch 12 are provided.
(SW2) is provided, and the first and second rim shot switches 11 and 12 are covered with a rim cushion a. As a result, at the time of a rim shot, the rim cushion a is hit and the first rim shot switch 11
Alternatively, the second rim shot switch 12 operates (O
N)

First and second rim shot switches 1
Film switches 1 and 12 are shown in FIG. 3 (B).
As shown in, the first rim shot switch 11 (S
W1) is arranged in a substantially semi-circular shape in a portion of the rim portion (rim c) far from the player, and the second rim shot switch 12
(SW2) is arranged in a substantially semi-circular shape in the front portion of the rim portion near the player. The first and second rim shot switches 11 and 12 can surely detect the rendition styles of the closed rim shot and the open rim shot.

The sensor unit portion 10 is composed of a sensor holder h, the above-mentioned piezoelectric element i, a sensor cushion j, etc., and the sensor holder h includes a notch portion of the rim c and a separated portion on one side of the rim shot switches 11 and 12. And is joined to the bottom case e by a screw g.
The detailed structure of the sensor unit 10 will be described later.
As shown in FIG. 4, on the back surface of the bottom case e, the signals of the drum holder joint p for joining the member supporting the hit detection unit 1, the rim shot switches 11 and 12, and the piezoelectric element i are output. A signal output section (jack, etc.) q and the like are provided.

The head f is made of leather, a plastic sheet, or a first net and a second net woven by plain weaving in which fibers in the vertical and horizontal directions are orthogonal to each other so that the weave directions of the first and second nets cross each other. It is formed of a laminated net material (mesh) or the like. Further, the sensor holder h is made of metal and protects the piezoelectric element i from a shock when the sensor unit portion 10 is struck by mistake, and is a highly durable electronic drum. Furthermore, the bottom case e
Is formed by die-casting method of reinforced plastic or aluminum or wood. The rim cushion a is made of rubber and the rim c is made of metal. Further, the piezoelectric element i is a piezoelectric type piezoelectric sensor.

FIG. 5 is an enlarged sectional view of the sensor unit portion 10, showing three embodiments. In the sensor unit portion 10 of FIG. 5A, a sensor cushion j is fixed below the piezoelectric element i, and the lower end of the sensor cushion j is in contact with the head f. Further, a vibration absorbing material k such as butyl rubber is provided between the sensor holder h and the piezoelectric element i.
Are scattered, and the vibration absorbing material k fixes the piezoelectric element i to the sensor holder h. Note that FIG. 3 (B)
As shown by the broken line in FIG.
The point support allows the piezoelectric element i to be held particularly stably.

With the above configuration, when the head f is hit, the vibration of the head f is transmitted to the piezoelectric element i via the sensor cushion j, and a vibration waveform signal corresponding to the hitting force is output from the piezoelectric element i. Further, at the time of rim shot, the sensor holder h vibrates and the vibration is transmitted to the piezoelectric element i via the vibration absorbing material k, and the vibration waveform signal corresponding to the striking force is transmitted to the piezoelectric element i.
Is output from.

In the sensor unit portion 10 of FIG. 5B, a sensor cushion j is fixed below the sensor plate m so as to abut the head f, and a piezoelectric element i absorbs vibration on the sensor plate m. It is arranged via the material k. Further, a plurality of sensor holder protrusions 1 protruding from the sensor holder h are scattered, and a sensor plate m is fixed to the lower end of the sensor holder protrusion l. With such a configuration, the vibration is transmitted to the piezoelectric element i, and the accurate vibration can be detected.

With the above structure, when the head f is hit, the vibration of the head f is transmitted to the piezoelectric element i via the sensor cushion j, and a vibration waveform signal corresponding to the hitting force is output from the piezoelectric element i. Further, at the time of rim shot, the sensor holder h vibrates and the vibration is transmitted to the piezoelectric element i via the sensor holder protrusion l, the sensor plate m and the vibration absorbing material k, and the vibration waveform signal corresponding to the striking force is transmitted to the piezoelectric element. It is output from i.

In the sensor unit portion 10 of FIG. 5C, a sensor cushion j is fixed below the sensor plate m so as to contact the head f, and piezoelectric elements i are scattered on the sensor plate m. It is arranged via the vibration absorbing material k. Further, a plurality of sensor holder protrusions 1 protruding from the sensor holder h are scattered, and a sensor plate m is fixed to the lower end of the sensor holder protrusion l via a vibration absorbing material k. With such a configuration, the vibration is transmitted to the piezoelectric element i, and the accurate vibration can be detected.

With the above structure, when the head f is hit, the vibration of the head f is transmitted to the piezoelectric element i via the sensor cushion j, and a vibration waveform signal corresponding to the hitting force is output from the piezoelectric element i. Further, at the time of a rim shot, the sensor holder h vibrates, and the vibration is transmitted to the piezoelectric element i via the sensor holder protrusion l, the vibration absorbing material k, the sensor plate m and the vibration absorbing material k, and vibrates according to the striking force. A waveform signal is output from the piezoelectric element i.

In FIGS. 5A to 5C, the sensor cushion j is a buffer member made of a material such as rubber or urethane sponge, and absorbs only unnecessary vibration of the shock transmitted from the head f. The vibration absorbing material k is butyl rubber or the like as described above, and absorbs only the unnecessary vibration of the shock transmitted from the sensor holder h.

As described above, since the sensor cushion j is interposed between the piezoelectric element i and the head f, a signal with less noise can be obtained when the head is hit. Further, the piezoelectric element i is connected to the rim c via the sensor holder h.
The vibration waveform signal corresponding to the impact at the time of rim shot can be accurately obtained, and the signal with less noise can be obtained by the vibration absorbing material k and the like.

FIG. 2 is a diagram showing a circuit configuration of essential parts of the hit detection unit 1 and the tone control unit 2 of the first embodiment. In the following description, for simplification, the "first rim shot switch 11" will be appropriately replaced with "SW1" and the "second rim shot switch 12" will be replaced with "SW2". SW1 and SW2 provided on the rim portion of the impact detection unit 1 are connected in parallel, and one switch (SW2) is connected in series with this switch.
A 0K ohm resistor R1 is connected. SW1, SW2
Is the first output line 31 of the stereo cable 3
Is connected to one input terminal of each of the first and second comparators 211 and 212 in the signal detector 21 of the musical sound controller 2. In addition, the comparator 211,
Reference voltages of 3 V and 0.6 V are applied to the other input terminal of 212, and the first output line 31
Is connected to a predetermined voltage of 5V via a 10K ohm resistor R2.

One end of the piezoelectric element i of the hit detection section 1 is connected to the amplification / rectification integration circuit 22 of the musical tone control section 2 via the second output line 32 of the stereo cable 3. And
The connection point of SW1 and the resistor R1 and the other end of the piezoelectric element i are
It is grounded on the musical tone control section 2 side via the common shielded wire 33 of the stereo cable 3. In this example, the stereo cable 3 is a 2-core shielded cable,
The same applies to a three-core cable.

With the above configuration, the vibration waveform signal of the piezoelectric element i is converted into an envelope signal by the amplification / rectification integration circuit 22 and input to the A / D converter 23. When SW1 and SW2 are both OFF (open), a predetermined voltage greater than 3V is applied to one input terminal of each of the first and second comparators 211 and 212, and the outputs of the comparators 211 and 212 are Both are “1”.
When SW1 is ON (closed), SW2 is ON /
Regardless of OFF, one input terminal of each of the comparators 211 and 212 is grounded, and the comparators 211 and 21
The outputs of 2 are both "0". When SW1 is OFF and SW2 is ON, a predetermined voltage (2.5V) is applied to one input terminal of each of the comparators 211 and 212, the output of the comparator 211 is "0", and the output of the comparator 212 is Becomes "1".

Table 1 below summarizes the relationship between the states of SW1 and SW2 (switch operation), the output of the comparator 211 (Data1) and the output of the comparator 212 (Data2). This comparator 211,21
The output of 2 is input to the port of CPU24, and CPU24
The states of SW1 and SW2 are identified by. Then, a tone color as shown in the table is assigned according to each state.

[0044]

[Table 1]

As described above, SW1 is arranged at a portion of the rim portion far from the player, and SW2 is arranged at a portion of the rim portion near the player. Therefore, the normal head f
At the time of hitting, the hitting strength is detected by the piezoelectric element i, both SW1 and SW2 are OFF, and the outputs of the comparators 211 and 212 are Data1 =
“1” and Data2 = “1”. In other words, in this case, it means that no rim shot was detected,
A tone for hitting the head produces a hitting sound corresponding to the hitting strength. Data1 = “1” and Data2 =
The state of “1” is referred to as “state 1”.

During the open rim shot, the impact strength is detected by the piezoelectric element i, SW1 (back side) is OFF, SW2 (front side) is ON, and the outputs of the comparators 211 and 212 are: Data1 = "0",
Data2 = “1”. In this case, a hitting sound corresponding to the hitting strength is generated with an open rim shot tone color. Data1 = "0" and Data2 = "1"
The state of is referred to as “state 2”.

During a close rim shot, the impact strength is detected by the piezoelectric element i, SW1 (back side) is turned on, and SW2 (front side) presses the gripped stick against SW2 to perform. Depending on whether or not to adopt the method described above, it is turned on or off. The outputs of the comparators 211 and 212 at this time are Dat in both cases.
a1 = “0” and Data2 = “0”. In this case, a batting sound corresponding to the batting intensity is generated with a tone color for a close rim shot. In addition, when Data1 = "0", D
The state of ata2 = "0" is referred to as "state 3".

As described above, the resistance R1 is a resistance means for adding different resistances to the output signals of SW1 and SW2, and the comparators 211 and 212 and the CPU 24 have the voltage difference generated by the resistance R1 in the output signal of the first output line 31. According to the above, it is an identification means for identifying the switch operation of SW1 and SW2. Further, the CPU 24 is a tone control means.

In the hit detection unit 1 in the embodiment, even when the hit detection unit 1 is connected to the conventional tone control unit (controller), if either SW1 or SW2 is turned on,
In order to be able to pronounce the sound of the rim shot,
In order to detect the ON of SW1 or SW2,
The resistance value added to SW2 is determined.

The processing of the sounding operation described above is performed by the timer interrupt processing of the CPU 24. FIG. 6 is a diagram showing an example of the change of the state according to the switch operation of the first embodiment, FIG. 7 is a flowchart of the timer interrupt processing, and the operation of the first embodiment will be described based on FIGS. 6 and 7. To do. It should be noted that although the sound generation process corresponding to the closed rim shot and the open rim shot is performed in this timer interrupt process, the sound generation process corresponding to a normal head hit is a piezoelectric process in the main process performed in parallel with this timer interrupt process. This is performed when the envelope of the vibration waveform signal of the element i is other than "0".

Since SW1 and SW2 are both OFF and remain in the state 1 between AB, CD, EF, and IJ in FIG. 6, there is no change in step S1 and step S2 (FIG. 7).
When it becomes O, the routine returns to the original routine as it is, and if the envelope of the vibration waveform signal is not "0" in the main processing, the sounding processing corresponding to the head hit is performed. That is, when a normal head is hit, the hitting strength is detected by the piezoelectric element i and both SW1 and SW2 are OFF (state 1).
Therefore, a tone for hitting the head produces a striking sound corresponding to the striking intensity.

When SW2 is turned on, the state changes from state 1 to state 2 (point B in FIG. 6), and YES is obtained in step S2,
By the open rim shot processing in step S4, a hitting sound corresponding to the hitting strength detected by the piezoelectric element i is generated with an open rim shot tone color. In the state where SW2 is still ON (between BC in FIG. 6), there is no change in state 2, so both steps S7 and S8 are NO, and this loop is repeated. And SW2 is OFF
Then, state 2 changes to state 1 (point C in FIG. 6),
If YES in step S8, the process returns to the original routine.

When SW1 is turned on, the state changes from state 1 to state 3 (point D in FIG. 6), and YES is obtained in step S1,
In step S3, by the close rim shot processing, an impact sound corresponding to the impact strength detected by the piezoelectric element i is generated with a tone color for the close rim shot. In the state in which SW1 is still ON (between DEs in FIG. 6), the state 3 remains unchanged, so that both steps S5 and S6 are NO, and this loop is repeated. And SW1 is OFF
Then, the state changes from state 3 to state 1 (point E in FIG. 6),
If YES in step S6, the process returns to the original routine.

A close rim shot in which the vicinity of the player on the rim portion (front side) is pressed against the grip portion of the stick, and the portion of the rim portion remote from the player (back side) is hit. SW1 is turned on,
Since SW2 is turned on (becomes state 3), a batting sound corresponding to the batting intensity is generated with a tone color for a close rim shot.

SW2 is turned on (step S7,
In the loop of S8), when SW1 is further turned on, the state changes from state 2 to state 3 (point G in FIG. 6), and step S7
Is YES, and the close rim shot process is performed in step S3. Then, when SW1 is turned off, the state changes from state 3 to state 2 (point H in FIG. 6), and step SS5
Is YES, and the process returns to step S7. That is, even if one switch (SW2) is still pressed, the other switch (SW1) operates, so that the vicinity of the player on the rim is pressed near the grip of the stick to play the rim. Even if you hit the part far from the person,
Only the tone of the closed rim shot can be pronounced.

As described above, the first of the stereo cable 3
With the output line 31, it is possible to obtain an output according to the operation of the two switches (SW1, SW2) even with one line, so that it is possible to suppress the number of output lines and surely assign different timbres according to the rendition style.

(Second Embodiment) FIGS. 8 and 9 show a second embodiment of the impact detection unit 1, FIG. 8 (A) is a top view, FIG. 8 (B) is a partially cutaway side view, and FIG. Is a partially enlarged sectional view. In addition,
Elements corresponding to those of the first embodiment are designated by the same reference numerals as those in FIGS. The impact detection unit 1 of the second embodiment is in the shape of an acoustic drum, the head f is put on the open end (upper part) of a cylindrical bottom case (shell) e, and the outer edge ring d is attached by a rim c. , Pressed down and fixed. The rim c is joined to the bottom case e with a screw g. The rim c around the head f has a first rim shot switch 11 (SW1) and a second rim shot switch 11 (SW1).
Rim shot switch 12 (SW2) is provided. Thereby, at the time of rim shot, the first rim shot switch 11 or the second rim shot switch 1
2 operates (ON).

As shown in FIG. 9, the sensor unit 1
Reference numeral 0 indicates a sensor holder h, a piezoelectric element (piezoelectric type piezoelectric sensor) i, a sensor cushion j, a vibration absorbing material k, a volume controller r, a signal output part q, etc., and the sensor holder h is attached to a rim c via a base h1. It is fixed. A plurality of vibration absorbing materials k such as butyl rubber are scattered between the substrate h1 and the piezoelectric elements i, and the piezoelectric elements i are fixed to the sensor holder h by the vibration absorbing materials k. A sensor cushion j is fixed below the piezoelectric element i, and the lower end of the sensor cushion j is in contact with the head f.

With the above configuration, when the head f is hit, the vibration of the head f is transmitted to the piezoelectric element i via the sensor cushion j, and a vibration waveform signal corresponding to the hitting force is output from the piezoelectric element i. Further, at the time of a rim shot, the sensor holder h vibrates and the vibration is transmitted to the piezoelectric element i via the substrate h1 and the vibration absorbing material k, and a vibration waveform signal corresponding to the striking force is output from the piezoelectric element i. Since the piezoelectric element i is coupled to the rim c via the sensor holder h, it is possible to accurately obtain the vibration waveform signal corresponding to the impact on the rim shot. Also in FIG. 9, the sensor cushion j is a cushioning member made of a material such as rubber or urethane sponge, and absorbs only unnecessary vibration of the shock transmitted from the head f, so that there is less noise when hitting the head. You can get a signal. Further, since the vibration absorbing material k is butyl rubber or the like as described above and absorbs only unnecessary vibration transmitted from the sensor holder h, it is possible to obtain a signal with less noise.

The sensor holder h is provided with a volume controller (variable resistor) r, and when the volume controller r is rotated, the volume value (resistance value) changes. It is detected by the control unit as a volume control signal for tone color control. In the first embodiment, SW1, S
The operation of the two switches of W2 is output in one line, but in the second embodiment, the volume control signal is detected by the same first output line 31 as the switch signals of SW1 and SW2.

FIG. 10 is a diagram showing a circuit configuration of essential parts of the hit detection unit 1 and the musical sound control unit 2 of the second embodiment. Elements similar to those of FIG. 2 of the first embodiment have the same reference numerals as those of FIG. Is added. As shown in the figure, a 47K ohm resistor R3 is connected in series to the volume controller r, and the volume controller r and the resistor R3 are connected in parallel with SW1 and SW2. The connection point of SW1, SW2 and the volume controller r is connected to the A / D converter 213 in the signal detection unit 21 of the musical sound control unit 2 via the first output line 31 of the stereo cable 3, and this A / D converter 213 is connected. The output is input to the CPU 24 (FIG. 1). Further, the first output line 31 is connected to a predetermined voltage of 5V through a resistor R4 of 47K ohm.
Other configurations are the same as those in FIG. In the second embodiment, the volume controller r is the control means 13 shown in FIG.

Here, the A / D converter 213 converts the voltage of the first output line 31 into digital data, and the combined resistance value of the volume controller r, the resistor R3 and the resistor R1 when the SW2 is ON is , Smaller than the combined resistance value of the volume controller r and the resistor R3,
The voltage of the first output line 31 when SW2 is ON (SW1 is OFF) is lower than the voltage when both SW1 and SW2 are OFF. Therefore, the CPU 24
By the output of the A / D converter 213, SW1 and SW2
Are both OFF, SW1 is OFF and SW2 is ON, SW1 is ON (SW2 is ON / OF
State 3 which is F) can be identified.
Further, in the state 1 in which both SW1 and SW2 are OFF, the volume control signal (voltage value) corresponding to the resistance value of the volume controller r can be read by the output of the A / D converter 213.

As described above, the resistors R1 and R3 are connected to SW1 and S.
A resistance unit for adding different resistances to the output signal of W2 and the control signal of the volume controller r,
The / D converter 213 and the CPU 24 have SW1, SW
SW in accordance with the voltage difference generated by the resistance means between the output signal of 2 and the control signal of the volume controller r.
1, SW2 switch operation and volume controller r
It is an identification means for identifying the operation of In addition, SW
The voltage of the first output line 31 in the state 2 in which 1 is OFF and SW2 is ON changes according to the resistance value of the volume controller r, but the resistance value of the resistor R3 is sufficiently larger than the resistance value of the resistor R1. The change in the voltage of the output line 31 is slight, and the judgment level of the state 2 is set to have an appropriate width so that the signal of the SW 2 (state 2) can be sufficiently identified regardless of the resistance value of the volume controller r. can do.

As described above, the change in the resistance value of the volume controller r can be obtained as the voltage change in the state 1 as in the first embodiment. That is, in the non-striking state (both SW1 and SW2 are OFF), the resistance value of the volume controller r is changed, the volume control signal (voltage value) is read, and the tone color assigned to the head according to the volume control signal is reproduced. You can control.

FIG. 11 is a diagram showing an example of a change in state according to the switch operation and the volume controller r operation of the second embodiment, and FIG. 12 is a flowchart of the timer interrupt processing of the second embodiment. And the second based on FIG.
The operation of the embodiment will be described. Note that in FIG. 12, the same step numbers as in FIG. 7 are added to the portions where the same processing as in the first embodiment is performed. Also in the second embodiment, the sounding process corresponding to a normal head hit is performed in the main process as in the first embodiment.

In the example of FIG. 11, the volume controller r
Is an example in which the switch operation (switching of rendition style) similar to that in the first embodiment (FIG. 6) is performed while gradually squeezing from the maximum resistance value state and then gradually changing to the maximum resistance value state. SW between AB, CD, EF, and IJ in FIG.
Both 1 and SW2 remain in the OFF state 1, and when the volume control signal is maximum (between AA 'in FIG. 11), the volume control signal does not change. Return to the routine. Then, when there is a change in the volume control signal (between A′B, between CD, E in FIG. 11).
(Between F and IJ) is YES in step S21, NO in steps S1 and S2, volume processing is performed in step S22 to adjust the timbre according to the output data of the A / D converter 213, and the process returns to step S21. . In addition, when the vibration waveform signal is detected or when SW1, S
When the operation of W2 is performed, the same processing as that of the first embodiment is performed, and the sound with the tone for hitting the head, the sound with the tone for the open rim shot, and the sound with the tone for the close rim shot are performed.

As described above, the first output line 31 of the stereo cable 3 has two switches (S) even in one line.
Since the output of the switch signal of W1, SW2) and the volume control signal can be obtained, it is possible to suppress the number of output lines and reliably assign different tones according to the playing style, and adjust the snare tension on the actual drum. It is possible to perform tone color control by operating the impact detection unit (head unit) as in the case of the above.

The volume controller r is not limited to the rotating form as in the embodiment, but may be a slide volume or other forms. Further, when the volume controller r is provided in the head portion as in the embodiment, it is easy to understand that it is for adjusting the tone color of the head portion, which is convenient. However, the volume controller r should be provided separately from the head portion. You may

Furthermore, as shown by the broken line in FIG. 10, another volume controller may be connected in parallel. For example, separate volume controllers such as a foot pedal may be connected in parallel. In this case, if you set one volume controller to maximum,
Similar control can be performed by the other volume controller. For example, as shown in FIG. 13, a ribbon controller t is attached to the head portion, and this is connected to the volume controller r by a controller connection s. Then, the volume controller r may be set to the maximum resistance value, and the timbre control may be performed by the ribbon controller t.

In the first embodiment (FIG. 3), the rim shot switch (SW1) 11 and the rim shot switch (SW2) 12 in the rim portion are equally divided so as to correspond to a half circle, but the present invention is not limited to this. , SW1 and SW2 may have different sizes. For example, in the second embodiment (FIG. 8), SW1 occupies three-quarters of the rim circle and SW2 has four.
It is arranged to occupy one-tenth, and by increasing the proportion of SW2 on the front side of the player and decreasing the proportion of SW1 on the back side in this way, an open rim that is frequently used It is possible to play the shot easily.

(Third Embodiment) In the second embodiment, the volume controller r is used as the control means 13, but a rotary encoder may be used as the control means 13 as in the third embodiment. . FIG. 14 is a diagram showing a circuit configuration of essential parts of the batting detection section 1 and the musical sound control section 2 of the third embodiment. Elements similar to those of FIG. 10 of the second embodiment are designated by the same reference numerals as in FIG. There is. The rotary encoder u includes two encoder switches SWa and SWb. As is well known, the encoder switches SWa and SWb are, for example, switches with contacts that are held with two phase differences interlocked with the rotary operator, and as shown in FIG. 15, for example, depending on the rotation of the rotary operator. It is turned on / off with a phase difference. In addition, the phase difference caused by the difference in the rotation direction also differs.

As shown in FIG. 14, one encoder switch SWa has a resistance (resistance means) R of 33 K ohms.
5 are connected in series, and the other encoder switch SWb
A resistor (resistive means) R6 of 100 K ohms is connected in series with. The encoder switch SWa and the resistor R5, and the encoder switch SWb and the resistor R6 are connected in parallel to SW1 and SW2, respectively. The first output line 31 is connected to a predetermined voltage of 5V via a resistor R7 of 33K ohms, and is also grounded via a 0.1 μF capacitor C for noise prevention.

FIG. 16 is a diagram showing an example of changes in the output voltage according to the operation of the rotary encoder u of the third embodiment. When both SW1 and SW2 are in the OFF state 1, the rotary operator of the rotary encoder u is shown. It shows the case where is operated. This output voltage changes as shown in FIG. 16 (A) when it rotates left as shown in FIG. 15 (A), and it changes as shown in FIG. 16 (B) as it rotates right as shown in FIG. 15 (B). ) Changes. In this way, different output signals are obtained depending on the rotation direction, so that the rotation direction can be determined by the magnitude of the value of the first stage that is stable and decreases below 5V. And the CPU 24
In accordance with this rotation direction and the number of pulse signals, the tone color control signal (degree of control) is increased or decreased to control the tone color assigned to the head, as in the second embodiment. In addition, when the vibration waveform signal is detected
When the SW1 and SW2 are operated, the same processing as in the first and second embodiments is performed to generate a percussion instrument sound according to the performance style.

In the above second and third embodiments, the tone color assigned to the head is controlled by the volume controller or the rotary encoder, but the open rim shot tone color or the closed tone color assigned to the rim portion is controlled. The rim shot tone color may be controlled, and the present invention is not limited to this, and the volume controller or the rotary encoder may be used to switch the drum kit (the type of musical instrument (tone color) in the drum set). In addition, the target controlled by the volume controller or the rotary encoder is not limited to this.

(Fourth Embodiment) FIG. 17 shows a fourth embodiment of the impact detection unit 1, FIG. 17 (A) is a plan view, and FIG. 17 (B) is a sectional view taken along the line A--A of FIG. 17 (A). Is. The hit detection unit 1 is an example of a cymbal type, and a fan-shaped frame v is covered with a fan-shaped pad w made of an elastic member, and a case x for accommodating the resistor R1 and the output terminal is provided on the back surface of the frame v. The structure is attached.

The pad w has a cup portion w2 which is bulged around the mounting hole w1, a head w3 which spreads over a range of about 90 degrees around the mounting portion w1, and a rim w4 which is formed on the edge of the head w3, and which has a frame v. An arc-shaped rim shot switch 11 '(SW1) is provided between the peripheral edge of the rim and the rim w4. In addition, the vicinity of the center circle of the frame v and the cup portion w2
In between, an arc-shaped cup shot switch 12 '(S
W2) is provided. Further, a piezoelectric element i is arranged on the back surface of the frame v corresponding to the lower portion of the cup portion w2 on the base side of the head w3. Incidentally, the rim shot switch 11 '(SW1), the cup shot switch 12' (SW2) and the piezoelectric element i in the fourth embodiment.
2 is the same as the circuit of FIG. 2 for the rim shot switches 11 and 13 and the piezoelectric element i of the first embodiment.

With the above structure, the rim shot switch 11 '(SW1) is turned on by hitting the rim w3, and the cup shot switch 12' (SW2) is turned on by hitting the cup portion W2. In addition, the piezoelectric element i
As a result, a vibration waveform signal corresponding to the striking strength is obtained with respect to the striking of the center of the head w3, the striking of the rim w3, and the striking of the cup w2. Therefore, since ON / OFF of the rim shot switch 11 '(SW1) and the cup shot switch 12' (SW2) and the striking strength can be detected, the number of output lines of the cymbal type can be suppressed and a normal cymbal tone, It is possible to reliably represent the three colors of the rim striking tone and the cup striking tone.

(Fifth Embodiment) In each of the above embodiments, the signal processing device of the present invention is applied to an electronic percussion instrument, but it is applied to a keyboard instrument as in the fifth embodiment shown in FIG. You can also In the fifth embodiment, a piezoelectric element 51 is arranged below the center of each key 41 on a circuit board under the key of an electronic keyboard instrument, and a left switch 52 (SW1) and a right switch are provided on both sides of the piezoelectric element 51. 53 (SW
2) is provided. Each left switch 52 and each right switch 53 corresponding to each key 41 is connected to the musical sound control section 2'through an output line 61, and each right switch 53 is connected.
A resistor R8 is connected between the second output line 61 and the first output line 61. Further, the piezoelectric element 51 corresponding to each key 41 is connected to the musical sound control section 2 ′ via the second output line 62.

With the above structure, when the key 41 is pressed, the piezoelectric element 51 is pressed by the actuator formed on the back surface of the key 41, and the resistance value is changed according to the pressing force.
The change in the resistance value of the piezoelectric element 51 can be detected as a voltage change by the musical sound control unit 2 ', so that aftertouch can be detected.

The left switch 52 and the right switch 53 are operated by the key 4
It is turned on / off by the contact / non-contact of the actuator contact formed on the back surface of 1. When the key 41 is pressed straight, the actuator corresponding to the piezoelectric element 51 is in contact, so The contacts corresponding to the switch 52 and the right switch 53 are both non-contact, and both the switches 52 and 53 are turned off. Key 4 in this state
When the key is pressed to tilt 1 to the left, the left switch 52 comes into contact with the contact to turn it on (SW2 is off),
When the key is depressed to tilt the key 41 to the right, the right switch 53 comes into contact with the contact and is turned on (SW1 is off).

The switch signals of the left switch 52 (SW1) and the right switch 53 (SW2) can be detected as a voltage difference because the resistor R8 is connected, and like the above-described embodiment, It is possible to detect which of SW1 and SW2 is ON (or OFF) in the tone control section 2 '. Therefore, the tone control unit 2'provides an ON / OF switch for SW1 or SW2.
Based on F and the output according to the pressing force of the piezoelectric element 51, it is possible to perform various musical tone controls such as producing different timbres and imparting different effects.

For example, with respect to a normal key depression (both SW1 and SW2 are OFF), a musical tone with a vibrato effect is generated according to the key depression strength (pressure) detected by the piezoelectric element 51, and the key 41 is moved to the left. When tilted (SW1 is ON, SW2
Is OFF), a musical sound with a reverberation effect is generated according to the key pressing strength detected by the piezoelectric element 51, and the key 41 is tilted to the right (when SW1 is OFF and SW2 is ON). For example, a musical tone with a pan effect is generated according to the key pressing strength detected by the piezoelectric element 51. In this way, different timbres can be produced and different effects can be imparted by the operations of SW1 and SW2. Moreover, since the output lines 61 of SW1 and SW2 need only be one line, the wiring design and structure are simplified.

Although the respective embodiments have been described above, the following configurations may be adopted. In the embodiment of the electronic percussion instrument, a plurality of piezoelectric elements of the hit detection unit may be provided, and at the time of hit, the hit position is specified by referring to the output signals of the plurality of piezoelectric elements, and the hit position is determined according to the hit position. You may make it sound with a tone color. In this case, an output signal-striking position conversion table for specifying the striking position may be provided, and the striking position may be specified by referring to the table.

Although a piezoelectric element is used as the impact sensor in the embodiment, any sensor such as an optical sensor or a magnetic sensor can be used as long as it can detect impact strength. Also,
The switch is not limited to a film switch, and may be another type of switch.

The number of switches is not limited to two, but SW3,
It is also possible to prepare a plurality of SW4, ... And set different resistances to the respective output signals so as to output on one line so that the operation of each switch can be identified.

In the above embodiment, SW1 of the hit detection unit 1
Although the SW2 is provided in the same device, the SW2 may be provided in a different portion such as the foot pedal portion, or the SW3 may be newly provided in the foot pedal portion so that a different tone color such as a bass drum tone color can be produced by pedal operation. You may make it pronounce. In this case, the wiring can be facilitated by using a simple adapter or the like that can connect SW3 to the same line as SW1 and SW2.

In the first and second embodiments, the two rim shot switches (SW1) and (SW2) are arranged in two parts, that is, the upper and lower parts (front and rear) of the part of the rim c which is far from the player. However, not limited to this, by arranging the switches inside and outside the rim c (concentrically), when the inner switch is turned on, the closed rim shot and the outer switch are turned on. In this case, an open rim shot tone may be used.

The hit detection unit and the tone control unit are not limited to those which are separate and connected by a cable as in the embodiment, but can be applied to those which are processed in the same device.

In the first and second embodiments, two switches are arranged on the rim c, but not limited to the rim, a plurality of switches are provided on the head to identify the switch operation of the plurality of switches. Alternatively, different tones may be pronounced.

[0090]

According to the musical tone control apparatus of the first aspect, the number of output lines can be suppressed to enable multifunctional musical tone control.

According to the tone control device of the second aspect, the same effect as that of the first aspect can be obtained, and the jack or the stereo cable of the conventional sound source module or the like can be used as it is.

According to the signal processing device of the third aspect, the switch operation of the plurality of switches and the operation of the control means can be identified only by the one series of the first output line, so that the number of output lines can be suppressed and the multifunctional musical sound can be obtained. Signal processing such as control becomes possible.

According to the electronic percussion instrument of claim 4, the number of output lines can be suppressed to enable the multifunctional percussion instrument tone control according to a plurality of rim shot performances, and the jack or stereo of a conventional sound source module or the like. The cable can be used as it is.

According to the electronic percussion instrument of claim 5, the number of output lines can be suppressed to enable multi-functional percussion instrument tone control in accordance with a plurality of rim shot performances, and tones such as snare drums and tom toms can be set. For example, it can be performed near the rim, and the jack or stereo cable of a conventional sound source module or the like can be used as it is.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an electronic percussion instrument to which a signal processing device and a musical sound control device according to an embodiment of the present invention are applied.

FIG. 2 is a diagram showing a circuit configuration of essential parts of a hit detection unit and a tone control unit according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view and a top view of a hitting detection section in the first embodiment of the present invention.

FIG. 4 is a rear view of the hit detection unit.

FIG. 5 is an enlarged sectional view of a sensor unit portion according to the first embodiment of the present invention.

FIG. 6 is a diagram showing an example of a change in state according to a switch operation in the first embodiment of the present invention.

FIG. 7 is a flowchart of a timer interrupt process in the first embodiment of the present invention.

8A and 8B are a top view and a partially cutaway side view of a hitting detection portion in the second embodiment of the present invention.

FIG. 9 is a partially enlarged cross-sectional view of the hit detection unit.

FIG. 10 is a diagram showing a circuit configuration of essential parts of a batting detector and a musical tone controller in a second embodiment of the present invention.

FIG. 11 is a diagram showing an example of a change in state according to a switch operation and a volume controller operation in the second exemplary embodiment of the present invention.

FIG. 12 is a flowchart of a timer interrupt process in the second embodiment of the present invention.

FIG. 13 is a diagram showing an example in which there are two volume controllers in the second embodiment of the present invention.

FIG. 14 is a diagram showing a circuit configuration of essential parts of a batting detection section and a musical sound control section in a third embodiment of the present invention.

FIG. 15 is a diagram showing changes in the encoder switch in the third embodiment of the present invention.

FIG. 16 is a diagram showing an example of changes in the output voltage according to the third embodiment of the present invention.

17A and 17B are a plan view and a sectional view of a hitting detection section in the fourth embodiment of the present invention.

FIG. 18 is a diagram showing a main configuration of a keyboard device according to a fifth embodiment of the present invention.

FIG. 19 is a diagram showing an example of a circuit configuration of a conventional electronic percussion instrument.

FIG. 20 is a diagram illustrating an example of a rim shot playing method of a snare drum.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Impact detection part, 2 ... Musical sound control part (musical sound control means), 3
... stereo cable (2-core shielded cable: 3-core cable), 11 ... first rim shot switch (switch), 12 ... second rim shot switch (switch), i ... piezoelectric element (operation signal detection means: impact sensor) ), 13 ... Tone controller (control means),
21 ... Signal detection unit (identification means), 24 ... CPU (identification means), 31 ... First output line (output line (claim 3)), 32 ... Second output line, c ... Rim, f ... Head (operation) Part), R1 ... Resistance (resistive means), r ... Volume controller (control means), R3 ... Resistance (resistive means), 213 ... A / D converter (identification means), u ...
Rotary encoder (control means), R5 ... Resistance (resistance means), R6 ... Resistance (resistance means), w3 ... Head (operation section), w4 ... Rim, 11 '... Rim shot switch (switch), 12' ... Cup shot Switch (switch), 2 '... tone control section (identification means: tone control means), 41 ... key (operation section), 51 ... piezoelectric element (operation signal detection means), 52 ... left switch (switch), 53 ...
Right switch (switch), 61 ... First output line, 62
... second output line, R8 ... resistor (resistive means)

Claims (5)

[Claims] 1. A plurality of switches, an operation signal detecting means for outputting an operation signal in accordance with an operation in an operation section, a resistance means for adding a different resistance to an output signal of each switch, and an output signal of each switch. According to a voltage difference generated by the resistance means in the output signal of the first output line, a first output line that outputs the operation signal of the operation signal detection means, and a second output line that outputs the operation signal of the operation signal detection means. An identification unit for identifying a switch operation of each switch; and a tone control unit for controlling a tone based on the operation signal of the second output line and the identified switch action of each switch. Music tone control device. 2. The musical sound control device according to claim 1, wherein the first output line and the second output line are configured by a two-core shielded cable or a three-core cable. 3. A plurality of switches, control means for outputting a control signal, resistance means for adding different resistances to the output signal of each switch and the control signal of the control means, the output signal of each switch, and the The switching operation of each switch and the operation of the control means are distinguished according to the output line that outputs the control signal of the control means in one series and the voltage difference generated by the resistance means in the output signal of the output line. A signal processing device comprising: an identification unit. 4. A head which is a hit body, a rim arranged on the outer periphery of the head, a hit sensor which detects a hit on the head and outputs a vibration waveform signal, and a rim or a rim thereof. , A plurality of switches arranged in the vicinity of the switch, resistance means for adding different resistances to the output signals of the respective switches, a first output line for outputting the output signals of the respective switches in one series, and vibration of the impact sensor. Second output waveform signal
A two-core shielded cable or a three-core cable having an output line; identification means for identifying a switch operation of each switch according to a voltage difference generated by the resistance means in the output signal of the first output line; An electronic percussion instrument comprising: a musical tone control means for controlling a musical tone of a percussion instrument based on a vibration waveform signal of two output lines and the identified switch operation. 5. A head which is a hit body, a rim arranged on the outer periphery of the head, a hit sensor which detects a hit to the head and outputs a vibration waveform signal, and a rim on the rim or on the rim. A plurality of switches arranged in the vicinity of the switch, control means for outputting a control signal, resistance means for adding different resistances to the output signal of each switch and the control signal of the control means, and an output signal of each switch And a two-core shielded cable or a three-core cable having a first output line for outputting the control signal of the control means in one series and a second output line for outputting the vibration waveform signal of the impact sensor, and the first output Depending on the voltage difference caused by the resistance means in the output signal of the line, the switch operation of each of the switches and the controller And a head for controlling a musical sound of a percussion instrument based on the vibration waveform signal of the second output line and the identified switch operation, and the head based on the operation of the control means. An electronic percussion instrument, comprising: a tone control means for adjusting a tone color assigned to the.