JPH0635450A - Electronic percussion instrument - Google Patents

Abstract

PURPOSE:To enable diverse musical performances similarly to an acoustic percussion instrument by indicating the generation of a musical sound corresponding to a percussion detected by a percussion sensor and controlling the musical sound corresponding to operation on a rim part which is detected by a pressure sensor. CONSTITUTION:A percussion on an electronic drum pad is detected by a shock sensor 13 such as a piezoelectric element fitted to its percussion reception part. A rim sensor such as a pressure sensing resistance element fitted to a rim part detects the rim part being struck with a stick or pressed with a player's finger. A CPU 104 calculates the timbre and envelope of a musical sound to be generated with signals from the shock sensor 13 and rim sensor 22 and sends a sound generation indication to a sounding controller 112. The sounding controller 112 reads indicated waveform data out of a sound ROM 114 and adds envelope and timbre characteristics corresponding to the indication to the read waveform data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic percussion instrument equipped with an electronic drum pad, and more particularly to tone control by an electronic drum pad also equipped with a sensor on a rim portion.

[0002]

2. Description of the Related Art Conventionally, there is known an electronic percussion instrument which is provided with an electronic drum pad and generates a musical sound by detecting the timing of hitting the hit portion of the pad and the hitting force.

[0003]

Here, in the conventional electronic percussion instrument, since the musical tone is generated by detecting only the striking force of the striking portion of the electronic drum pad, it depends on the striking strength. Although it is possible to obtain changes in the musical sound, for example, a rim shot in which the rim and head of a snare drum were hit at the same time, or a performance in which the sound was muted by holding the cymbal, etc. and then holding it by hand was not possible. In addition, it was not possible to control the musical tone other than the change in tone color depending on the strength of tapping.

Although it is known that the rim portion of the electronic drum pad is also provided with a sensor, how to provide a signal from a sensor provided to a hit portion and a signal from a sensor provided to a rim portion. No proposal has been made as to whether or not it can be used to simulate an acoustic percussion instrument. In view of the above circumstances, the present invention proposes an electronic percussion instrument that includes sensors on both the struck portion and the rim portion and that can utilize signals detected by these sensors to perform various performances similar to an acoustic percussion instrument. The purpose is to do.

[0005]

The electronic percussion instrument of the present invention for achieving the above object comprises: (1) a hit portion, a rim portion surrounding the outer circumference of the hit portion, and a hit applied to the hit portion. An electronic drum pad having a hit sensor for detecting a hit and a pressure sensor for detecting an operation on the rim portion (2) Sound generation instructing means for instructing the sounding of a musical sound in response to the hit detected by the hit sensor (3) It is characterized by comprising a musical sound control means for controlling a musical sound in accordance with an operation on the rim portion detected by the pressure sensor.

Here, (4) when the operation to the rim portion is detected by the pressure sensor after the hit is detected by the hit sensor, the musical sound generated by the hit sensor detects the hit. , Mute processing is performed according to the output signal of the pressure sensor. (5) When the pressure sensor detects an operation on the rim portion for a time width shorter than a predetermined time width at substantially the same time as the hit detection by the hit sensor. , The tone color of the musical tone to be generated is controlled so as to be a musical tone of a tone color different from the musical tone generated when the impact of the impact sensor is detected without detecting the operation of the rim portion by the pressure sensor. ) Decay of the musical sound to be produced when the pressure sensor detects an operation on the rim portion for a time longer than a predetermined time width at the time when the hit by the hit sensor is detected. It is preferably configured to be changed.

[0007]

The electronic percussion instrument of the present invention is the same as the conventional electronic percussion instrument in that the percussion sensor detects the striking applied to the striking portion and instruct the musical tone to be generated accordingly ((2) above). However, typically, the player detects an operation performed on the rim portion by the player, such as hitting the rim portion or pressing the rim portion with the hand ((3) above), and a musical sound is generated in response to this operation. A controllable structure ((4) above) is provided, which enables various performances.

If mute processing, tone color control, and decay change are performed as described above in (4), (5), and (6), a rim shot that strikes the rim and head of the snare drum at the same time, You can perform the same performance as an acoustic percussion instrument such as a cymbal choke.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an electronic drum pad of an electronic percussion instrument according to an embodiment of the present invention. The electronic drum pad has a substantially circular upper surface, has a hit portion (head portion) 11 at the center, and a rim portion 21 at the periphery. The upper surfaces of the head portion 11 and the rim portion 21 are covered with rubber (hatched portion in the figure).
In FIG. 1, the diaphragm 12 is provided on the lower surface of the rubber, and the shock sensor 1 for detecting the vibration of the diaphragm 12 is further provided on the lower surface thereof.
3 is provided. In addition, the rim portion 21 has the rim portion 2
1 was hit with a stick, or this rim part 2
A rim sensor 22 is provided which detects that the player 1 has pressed the finger 1 with a finger. The head portion 11 and the rim portion 21 are supported by the case 33. Further, a fixing portion 35 for fixing the electronic drum pad 10 to the shaft is provided at the left end of this figure.

FIG. 2 is a block diagram showing a circuit configuration of an electronic percussion instrument according to an embodiment of the present invention. The electronic percussion instrument 100 is controlled by a CPU 104 that operates according to a program stored in a program ROM 102. The impact on the electronic drum pad 10 is detected by a shock sensor 13 (see FIG. 1) such as a piezoelectric element or a microphone attached to the electronic drum pad 10, and its output is detected by the envelope extraction unit 106.
Is supplied to. The envelope waveform extracted by the envelope extraction unit 106 is converted into a digital signal by the A / D converter 108 and then supplied to the CPU 104.

A rim sensor 22 attached to the rim portion 21
Is a pressure-sensitive resistance element or the like whose resistance value changes according to the strength to be pressed, and a change in resistance value is detected as a change in voltage, and the rim sensor 22 is struck or hit by passing through the A / D converter 110. The pressing force is converted into a digital signal and supplied to the CPU 104. The CPU 104 calculates the tone color and envelope of the musical tone generated by the signals from the shock sensor 13 and the rim sensor 22 and instructs the sound generation control device 112 to generate sound.

Further, the CPU 104 has a function of automatically setting internal parameters so as to suppress variations in velocity and the like caused by individual differences among performers. This function will be described below. Since it is not known what kind of characteristics are input to the trigger signal input generated by impact or pressing force on the sensor, conventionally,
The operator has set various parameters according to the input signal so that the sound source can be optimally controlled. However, if there are many parameters, the setting is cumbersome and it is difficult for a beginner to set.

Therefore, here, the most suitable parameter value for the user can be automatically set only by striking the pad a plurality of times. This automatic setting is performed in the following procedure. First, bang, medium hit,
The drum pad is hit three times for each weak hit, the envelope of the signal from the shock sensor 13 at each hit is sampled, and each sampling waveform is stored.

Next, the CPU 104 reads the first peak value of the strong sampling waveform and takes the average value to obtain the maximum input level (MAX). DYNA), read out the first peak value of the weakly sampled waveform, and take the average value to obtain the minimum input level (MIN DYN
A). Here, the input level refers to the first peak value of the trigger signal input envelope generated by impact or pressing force on the sensor, and has a resolution of 0 to 255 (resolution of the D / A conversion device), for example, This performer has a minimum input level (MIN DYNA) 100
To the maximum input level (MAX DYNA) 230 range.

The CPU 104 has a strong sampling waveform and a minimum input level (MIN DYNA) to set the mask time and THRESHOLD. Specifically, when a strong sampling waveform as shown in FIG. 3 is stored, after the first peak A point, the second peak B
Further, there are a third peak C point and a fourth peak D point. The peak points from B to D are erroneous signals of the sensor signal generated by one hit on the pad. So, in BD, MIN MASK up to the fall of point B, which is larger than DYNA TIME is set, and one of the points C and D having a larger level is set to THRESHOLD.

As a result, MASK Depart within TIME
The generated second peak point B is not targeted for pronunciation, and
Also, the third peak C point and the fourth peak D point are THRE
Since it is below the SHOLD value, it is not a target of pronunciation in the same way.
No In this way, you can suppress unwanted sounds.
it can. Next, the average of the peak values at medium hits is calculated by MID DY
Obtained as NA, this MID DYNA and MAX mentioned above
DYNA, MIN Spline the curve that passes through the three points of DYNA
Obtained using a line function. As a result, as shown in Figure 4.
MIDI velocity to the striking force
The city.

Returning to FIG. 2, the description of the structure of the electronic percussion instrument of this embodiment will be continued. The pronunciation control device 112 uses the sound R
From the waveform data of a plurality of percussion instruments stored in the OM 114, the waveform data corresponding to the instructed percussion instrument is read. Envelopes and timbre characteristics are added to the read waveform data according to an instruction from the CPU 104.
For example, the tone color characteristics are controlled by changing the mixing ratio when synthesizing one musical sound with a plurality of waveform data, or controlling the filter coefficient when filtering the waveform data. The waveform data processed in this way is converted into an analog signal by D / A conversion, and then the output device 11
It is sent via 6 to an external amplifier (not shown) or the like. The RAM 118 is a memory for storing a temporary internal state.

FIG. 5 is a flow chart of a program executed by the CPU of the electronic percussion instrument of this embodiment. Also,
FIG. 6 is a diagram showing an example of the output waveform of the rim sensor when the rim portion is operated, FIG. 7 is a diagram showing an example of the output waveform of the shock sensor when the head portion is hit, and FIG. Rim sensor operating time (RIMT
FIG. 9 is a diagram showing an example of an envelope when the rim portion is pressed after hitting the head portion.

By executing the flow shown in FIG. 5, a) the decay of the sound is changed by the strength with which the rim portion is pressed during striking. b) Hold the rim during sounding to mute the sound. c) When the rim portion and the head portion are hit at the same time, another sound is emitted when only the head portion is hit. Function is realized. (Checking Operation State of Rim Sensor) When the flow shown in FIG. 5 is started, first in step S1, the output of the rim sensor 22 is monitored, and the rim portion 21 is pushed with a strength equal to or higher than a predetermined threshold value Th1. It is determined whether or not there is.

If the predetermined threshold value Th1 is exceeded, the process proceeds to step S3. If it does not exceed the predetermined threshold value Th1, a flag RIMON indicating whether or not the rim portion is pushed, and the current value after the rim portion is pushed. RI that represents the elapsed time to the time
MTIMER is cleared (step 2). In step S3, it is determined whether RIMTIMER is 0 or not.
When RIMTIMER is 0, RIMON is set ('1') (step S4), and then RIMTIME is set.
When R is not 0, the process directly goes to step 5, RIMT
The value of IMER is incremented by 1, whereby the duration of operation of the rim portion (see FIG. 6) is counted. (Sound Generation Process) After step S2 or step S5, the process proceeds to step S6, and it is determined in step S6 whether or not the output signal from the shock sensor exceeds a predetermined threshold value Th2 (see FIG. 7). Predetermined threshold T
When it is equal to or more than h2, it is determined that the head portion has been hit, and the sound generation processing from step S7 is performed. When it is equal to or less than the predetermined threshold value Th2, the head portion is hit. If it is determined that there is not, step S13
Proceed to.

In step S7, it is checked whether or not the rim portion is operated, that is, RIMTIMER is 0 at the time when the impact is applied to the head portion (step S6). When the rim portion is not operated, the process proceeds to step S12, and when only the head portion is struck, a musical tone of a corresponding tone color is produced. If it is determined in step S7 that the rim portion is being operated, RI is determined in step S8.
It is determined whether MTIMER is larger than a predetermined value T, that is, whether the rim portion has been operated for a predetermined time or longer (see FIG. 8). When RIMTIMER≤T, it is determined that the head and the rim are hit at the same time, and RIMON is first cleared ('0') (step S10), which is different from the case where the rim is not operated. , The tone corresponding to the rim shot is changed (step S11), and the tone of the changed tone color is generated (step S12). In step S9, the RIM
If TIMER> T, it is determined that the head portion is hit while holding down the rim portion, and the process proceeds to step S9, where the decay and tone color are changed according to the output of the rim sensor (strength with which the rim portion is pressed). The played musical sound is pronounced. (Mute processing during sound generation) When it is determined in step S6 that the output signal from the shock sensor does not exceed the predetermined threshold Th2, the process proceeds to step S13.
In this step S13, it is judged whether or not the sound is being generated at present, and if it is not being generated, the processing is ended. On the other hand, when the sound is being generated, it is determined whether or not the flag RIMON is on "1". If RIMON is off "0" even during sounding, no mute processing is performed and the process ends.
When RIMON is ON '1', it means that the rim portion was pressed down. When the rim portion is pressed strongly, when strongly pressed, as shown in FIG. As shown in FIG. 9 (B), the mute processing for attenuating the musical sound being sounded is performed a little more slowly and the musical sound modulation processing is also performed (step S16).

[0022]

As described above, the electronic percussion instrument of the present invention comprises the sounding instructing means for instructing the sounding of a musical sound in response to the hit detected by the hit sensor provided in the hit part of the electronic drum pad. The electronic drum pad is provided with a musical sound control means for controlling a musical sound in accordance with an operation to the rim portion detected by a pressure sensor provided in the rim portion. When the part is hit, the musical sound is controlled by the output of the pressure sensor. For example, it is possible to change the envelope and timbre of the sound by the strength with which the rim portion is pressed. (2) After sounding, the musical sound being sounded is controlled by pressing the rim portion by hand. For example, a cymbal choke can be performed by changing the decay of the sound according to the strength with which the rim portion is pressed. It is also possible to modulate the musical sound by the strength with which it is pressed. (3) It is detected that the hit portion and the rim portion are hit at the same time, and a different sound from that when hitting only the hit portion is sounded. For example, when using it as a snare drum, you can play a rim shot when you hit it at the same time. A variety of musical sound controls are possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an electronic drum pad of an electronic percussion instrument according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of an electronic percussion instrument according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of an output signal waveform from a shock sensor when a head portion is hit.

FIG. 4 is a diagram showing an example of a velocity curve obtained.

FIG. 5 is a flowchart of a program executed by the CPU of the electronic percussion instrument of the present embodiment.

FIG. 6 is a diagram showing an example of an output waveform of a rim sensor when a rim portion is operated.

FIG. 7 is a diagram showing an example of an output waveform of a shock sensor when a head part is hit.

FIG. 8 is a schematic diagram of an operation time (RIMTIMER) of the rim sensor until the head portion is hit.

FIG. 9 is a diagram showing an example of an envelope when the rim portion is pressed after hitting the head portion.

[Explanation of reference numerals] 10 electronic drum pad 11 head part 12 diaphragm 13 shock sensor 21 rim part 22 rim sensor 33 case 35 fixed part 100 electronic percussion instrument 102 program ROM 104 CPU 106 envelope extraction part 108, 110 A / D converter 112 pronunciation Controller 114 Sound ROM 116 Output device

Claims (2)

[Claims] 1. A hit portion, a rim portion surrounding the outer circumference of the hit portion, a hit sensor for detecting a hit applied to the hit portion, and a pressure sensor for detecting an operation on the rim portion. An electronic drum pad having: a sounding instruction means for instructing the sounding of a musical sound in response to a hit detected by the hit sensor; and a musical sound control means for controlling the musical sound in response to an operation on the rim portion detected by the pressure sensor. An electronic percussion instrument characterized by having. 2. The musical tone control means outputs the musical tone produced by the detection of the impact by the impact sensor when the operation of the rim portion is detected by the pressure sensor after the impact is detected by the impact sensor. When the operation to the rim portion is detected for a time width shorter than a predetermined time width by the pressure sensor, the mute processing is performed according to the output signal of the pressure sensor, and substantially at the same time as the detection of the hit by the hit sensor. In addition, the tone color of the musical tone to be generated is controlled so that the musical tone has a tone color different from the musical tone generated when the impact by the impact sensor is detected without detecting the operation on the rim portion by the pressure sensor. , A musical sound produced when an operation to the rim portion is detected by the pressure sensor for a time longer than a predetermined time width at the time when the impact by the impact sensor is detected. The electronic percussion instrument according to claim 1, wherein the decay of the electronic percussion instrument is changed.