JPH07311577A - Electronic percussion instrument - Google Patents

Abstract

PURPOSE:To simulate the sounds of a metallic percussion instrument reallistically by mounting vibration pickups at a metallic member, converting the impact applied on this metallic member into electric signals and inputting these electric signals to an electronic resonance circuit. CONSTITUTION:The vibration pickups 2A to 2C are mounted on the rear side of the disk-shaped metallic member 1 constituting gimbals. The vibration of the metallic member 1 are converted into the electric signals by these vibration pickups. Further, pressure sensor 3A to 3C are mounted outside the vibration pickups. The impulse wave signals from the vibration pickups are given to an electronic resonance circuit to take out the frequency components meeting the resonance frequaencies of the resonance circuit within the frequency components possessed by the impulsive wave signals as musical tones with the intervals determined by the period of the delay time T of a variable delay circuit and the attenuation characteristic GL determined by a gain g. The pitch, timbre, attenuation time, etc., of the sounds of the percussion instrument are changed by controlling the electronic resonance circuit by the signals of the pressure sensors.

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 used to play various musical compositions.

[0002]

2. Description of the Related Art The present applicant has already described in Japanese Patent Application No. 5-60332.
No. ”proposes an electronic musical instrument. The electronic musical instrument proposed earlier mainly converts the impact vibration into an electric signal as a shock wave signal by a vibration pickup, inputs this shock wave signal to an electronic resonance circuit, and sets the resonance frequency of the electronic resonance circuit to various values to make the drum sound. It is characterized by having a structure that can generate sounds or piano sounds.

[0003]

The previously proposed electronic musical instruments have a drum structure and a keyboard musical instrument structure such as a piano as a signal source for inputting an impact signal to an electronic resonance circuit. . Although it should be possible to generate the sound of any musical instrument by setting the resonance frequency of the electronic resonance circuit to various values, in reality, it is possible to use a metal drum percussion instrument from a signal source with a vibrating pickup mounted on a stretched drum. It is difficult to generate a sound that resembles a metal percussion instrument, even if it tries to generate the sound. The reason is that the percussion signal generated by the structure of the drum does not include the frequency component of the metal percussion instrument system.

An object of the present invention is to provide an electronic percussion instrument capable of realistically simulating the sound of a metal percussion instrument.

[0005]

According to the present invention, a vibration pickup is mounted on a metal member, the impact applied to the metal member is converted into an electric signal, and the electric signal is input to an electronic resonance circuit. . In addition to the vibration pickup, a pressure sensor is attached to the metal member, and a control signal is generated by applying a pressing force to this pressure sensor, and the state of the electronic resonance circuit is controlled by this control signal to produce an acoustic output. We also propose an electronic percussion instrument that can be changed.

Further, according to the present invention, irregularities arranged at a predetermined pitch are formed on the metal member, and the irregularities are rubbed,
We propose an electronic percussion instrument that can generate a strumming instrument, for example, a guillophone-like sound. According to the configuration of the present invention,
Since the shock wave signal generated in the metal member is input to the electronic resonance circuit, the shock wave signal contains a large amount of frequency components generated by the metal body. The sound can be simulated realistically.

[0007]

1 and 2 show an embodiment of the present invention.
In this embodiment, a cymbal type electronic percussion instrument is shown. On the back side of the disk-shaped metal member 1 forming the cymbal, for example, a vibration pickup 2A composed of a piezo element or the like,
2B and 2C are attached to the vibration pickups 2A and 2C.
The vibrations of the metal member 1 are converted into electric signals by B and 2C. An arbitrary number of vibration pickups 2A, 2B, 2C are provided. In the example of the figure, the case where three pieces are provided is shown. Pressure sensors 3A, 3B, 3C made of sheet-like pressure-sensitive rubber or the like are mounted outside the vibration pickups 2A, 2B, 2C. In this example, the pressure sensors 3A, 3B, and 3C are also provided dispersedly at three locations. These vibration pickups 2A, 2B,
2C and the pressure sensors 3A, 3B, 3C are covered with a rubber sheet 4 over the entire surface, and the vibration pickups 2A, 2B, 2
C and the pressure sensors 3A, 3B, 3C are protected and the vibration of the metal member 1 is rapidly damped.

The metal member 1 is disk-shaped, has a hole 1A for mounting to a stand, for example, in the center, and has uneven surfaces 5A, 5B, 5C and 5D on the surface of the disk. Each uneven surface 5A,
5B, 5C, and 5D have a structure in which concavo-convex arrays are formed at different pitches, and the periods of rattling sounds are different when rubbed with a stick or the like. FIG. 3 shows an example of the electronic resonance circuit. In the figure, 10 is a general term for the electronic resonance circuit. In this embodiment, the electronic resonance circuit 10 includes a variable delay circuit 11, a phase shifter 12 for changing the phase of a signal delayed by the variable delay circuit 11, a variable gain amplifier 13, and an amplifier for amplifying the variable gain amplifier 13. A case is shown in which the addition circuit 14 that adds a signal to the signal of the original signal system path is used. Although it is represented by an analog circuit in the drawing, it can be actually configured by a digital signal processing device called DSP, for example. The number of electronic resonance circuits 10 is not limited to one, and a plurality of resonance circuits are connected in parallel or in series to form a composite resonance circuit.

The electrical characteristic of this circuit is a circuit well known as a comb filter as shown in FIG. 5A. As shown in FIG. 3, when the delay time of the variable delay circuit 11 is T, the impulse response has a cycle of T and the variable gain amplifier 13
Has a logarithmic envelope GL determined by the gain g of Therefore, the vibration pickup 2 is connected to the electronic resonance circuit 10.
By giving a shock wave signal from A, 2B, and 2C, the pitch in which the frequency component matching the resonance frequency of the resonance circuit in the frequency component of the shock wave signal is determined by the cycle of T,
It is extracted as a musical sound with the attenuation characteristic GL determined by the gain g. This attenuation characteristic GL closely approximates the attenuation characteristic of a natural percussion instrument, and changes depending on the magnitude of the amplitude and frequency component of the input shock wave signal. Here, the variable delay circuit 11
When the delay time of T to change, for example, by the control signal of the pressure sensor 3A, the fundamental frequency f ₀ of the resonance frequency changes to f ₀ is f ₀₁ as shown in FIG. 5B, Similarly 2f _01, 3
f ₀₁ , 4f ₀₁ , etc., and the resonance frequency can be set to an arbitrary frequency.

Further, the gain g of the variable gain amplifier 13 is set to, for example,
When changed by the control signal of the pressure sensor 3c, FIG.
The damping characteristic GL shown in is changed, and the damping time is changed.
be able to. In addition, the amount of phase shift of the phase shifter 12 is detected by the pressure sensor.
Adjust the timbre by adjusting with the 3B control signal
can do. That is, the phase shift amount of the phase shifter 12 is changed.
The resonance frequency shown in FIGS. 5A and 5B.
Number f₀, 2f₀, 3f ₀… And f₀₁, 2f₀₁, 3f₀₁…
Can be changed to a non-integer multiple relationship,
Can be changed. As a result, the timbre is changed
be able to.

By connecting the loudspeaker 15 to an arbitrary position in the loop forming the electronic resonance circuit 10, the sound of the signal resonating in the electronic resonance circuit 10 can be reproduced from the loudspeaker 15. In this example, a case is shown in which a signal is taken out between the adder circuit 14 and the variable delay circuit 11, and the sound of the signal circulating in the loop is emitted from the loudspeaker 15. Note that the example in which the loudspeaker 15 is connected to the output terminal 16 is an example, and by connecting a wireless oscillator to the output terminal 16, for example, a signal generated by the electronic resonance circuit 10 is supplied to the loudspeaker 15 by radio waves. You can also do it.

As described above, the pressure sensors 3A, 3B, 3
By controlling the state of the electronic resonance circuit 10 with the control signal of C, the pitch, tone color, decay time, etc. of the sound of the percussion instrument can be changed. Pressure sensor 3A, 3B, 3
To change the control signal of C, the pressure sensors 3A, 3
The target pressure sensor 3A by grasping the positions of B and 3C by hand,
By applying pressure to 3B and 3C and changing the pressure, the pitch, tone color, and decay time of the sound can be changed in real time. Therefore, you can change the pitch, tone color, decay time, etc. of the sound during performance.
It is possible to produce the sound intended by the player.

Various embodiments in which the shape of the metal member 1 is changed are shown below in FIG. FIG. 6 shows a case where the present invention is applied to a metal percussion instrument generally called a cowbell. An uneven surface 5A, 5B, 5C is formed on the surface of the metal member 1 forming the cowbell, a plurality of vibration pickups and pressure sensors are attached to the back side of the metal member 1, and a rubber sheet 4 for damping the vibration of the metal member 1 is formed. The structure for sticking is the same as the structure described in FIGS. In this case, a finger is inserted into the hollow portion of the metal member 1 forming the cowbell, and pressure is applied to the pressure sensor with the finger to control the sound.

In the example of FIG. 7, the metal member 1 is a metal pipe. Uneven surface 5A, ...
The structure in which the vibration pickup and the pressure sensor are attached to the inner peripheral surface, and the rubber sheet is further attached to the same is the same as described above. Hereinafter, only the shape of the metal member 1 will be described. FIG. 8 shows a case where the metal member 1 is a square pipe. FIG. 9 shows a case of a polygonal flat plate. FIG. 10 shows a ring-shaped case.

By preparing the metal member 1 having various shapes and sizes as described above, it is possible to obtain a unique sound depending on the shape and size of the metal member 1.

[0016]

As described above, according to the present invention, the shock vibration generated in the metal member 1 is input to the electronic resonance circuit 10, and the shock wave signals generated by the vibration pickups 2A, 2B and 2C generate the shock wave signals. Since it is configured to resonate, it is possible to easily obtain a percussion instrument sound having a frequency component unique to a metal body. As a result, it is possible to easily obtain a sound close to that of a metal percussion instrument. Further, since the pressure sensor is provided, the state of the electronic resonance circuit 10 can be controlled by the control signal output from the pressure sensor, so that the pitch of the sound, the timbre, the decay time, etc. can be changed. You can change these in real time. Therefore, there is an advantage that a sound intended by the player can be produced.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment shown in FIG.

FIG. 3 is a block diagram showing an example of an electronic resonance circuit used in the present invention.

FIG. 4 is a graph for explaining the operation of the electronic resonant circuit shown in FIG.

FIG. 5 is a graph similar to FIG.

FIG. 6 is a perspective view showing a modified embodiment of the present invention.

FIG. 7 is a perspective view showing still another embodiment of the present invention.

FIG. 8 is a perspective view showing still another embodiment of the present invention.

FIG. 9 is a plan view showing still another embodiment of the present invention.

FIG. 10 is a plan view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Metal Member 2A, 2B, 2C Vibration Pickup 3A, 3B, 3C Pressure Sensor 4 Rubber Sheet 5A, 5B, 5C Uneven Surface 10 Electronic Resonance Circuit 11 Variable Delay Circuit 12 Phase Shifter 13 Variable Gain Amplifier 14 Addition Circuit 15 Loudspeaker

Claims (3)

[Claims] 1. A vibration pickup is attached to a metal member,
An electronic percussion instrument having a structure in which a detection signal of the vibration pickup is input to an electronic resonance circuit. 2. A pressure sensor is attached to the metal member according to claim 1, a control signal is output from the pressure sensor by applying a pressing force to the pressure sensor, and the state of the electronic resonance circuit is controlled by the control signal. An electronic percussion instrument characterized by having a structure that 3. An electronic percussion instrument, characterized in that the metal member according to claim 1 is provided with an uneven surface arranged at a desired pitch.