JPH05143071A - Electronic percussion instrument - Google Patents

Abstract

PURPOSE:To generate a musical sound of high quality by faithfully simulating the musical sound generated by a natural percussion instrument by simple constitution without requiring high manufacture cost. CONSTITUTION:A vibration detecting means 5 is fitted at a position corresponding to a specific position on the percussion surface of a performance operation element and in which the polarity of rising vibration characteristics is different between a case wherein the percussion position on the percussion surface corresponds to the fitting position of the vibration detecting means 5 and a case wherein the percussion position is away from the fitting position, so that output signals which differ in the polarity of the rising characteristics are generated. A polarity detecting means 12 detects the polarity of the rising part of the output signal of the vibration detecting means 5. A musical sound signal generating means 14 generates a musical sound signal in response to the detection of a percussion on the performance operation element and controls the characteristics of the musical sound signal according to the polarity detected by the polarity detecting means 12.

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,
In particular, the present invention relates to a high-quality musical tone that faithfully mimics the characteristic of the musical tone generated by a natural percussion instrument with a simple configuration and without high manufacturing cost.

[0002]

2. Description of the Related Art An electronic percussion instrument such as an electronic drum has a plurality of pads to which different kinds of tones (for example, tones of a drum, a snare drum, a cymbal, etc.) are assigned as a performance operator, and is hit. Tones with different tones can be generated according to the pad. The pad in such an electronic percussion instrument is basically a metal base portion, a rubber striking surface portion that is provided on the front surface side of the base portion and is striking by a striking member such as a stick, and a base portion. And a vibration sensor formed of a piezoelectric element or the like that is provided on the back surface side of the and that detects vibration at the time of striking the striking surface portion. The impact on the pad is detected based on the vibration detection by the vibration sensor. When a hit on the pad is detected in this way, a musical tone of a tone color previously assigned to the pad for which the hit is detected is generated.

By the way, in a natural percussion instrument such as a drum, even when striking the same striking face, the vibrating form of the striking face differs depending on the striking position on the striking face.
The tone color characteristics of the generated musical tones are considerably different. For this reason, in a natural percussion instrument, it is general to change the timbre by arbitrarily changing the striking position on the striking surface to enhance the performance expressing ability. Therefore, in the conventional electronic percussion instrument, in addition to the vibration sensor described above, a special striking position sensor for detecting the striking position on the striking surface part is provided in the pad in order to more faithfully mimic the characteristics of the musical sound generated by the natural percussion instrument. There is a device which can control the tone color characteristic of the musical sound to be generated according to the hitting position information output by the hitting position sensor. Such a striking position sensor is composed of, for example, a switch matrix inserted between the base portion and the striking surface portion.

[0004]

However, in the conventional electronic percussion instrument in which the tone color characteristic of the musical tone to be generated can be controlled in accordance with the striking position information as described above, the striking of a switch structure, for example, for each pad. Since the position sensor is provided, there are problems that the structure is complicated and the manufacturing cost is high. The present invention has been made in view of the above points, and can generate a high-quality musical tone that faithfully mimics the characteristic of the musical tone generated by a natural percussion instrument with a simple configuration and without high manufacturing cost. To provide such electronic percussion instrument.

[0005]

SUMMARY OF THE INVENTION An electronic percussion instrument according to the present invention has a performance operator having a striking surface for striking a musical tone, and the performance operation corresponding to a predetermined position on the striking surface. A vibration detecting means which is attached to the child and generates an output signal according to the vibration of the striking surface; a polarity detecting means which detects the polarity of the rising portion of the output signal of the vibration detecting means; The musical tone signal is generated in response to the detection of a hit, and the musical tone signal generating means controls the characteristic of the musical tone signal in accordance with the polarity detected by the polarity detecting means.

[0006]

The vibration detecting means is mounted at a position corresponding to a predetermined position on the striking surface, and the case where the position on the striking surface to which the striking is applied corresponds to the mounting position of the vibration detecting means and the mounting position. When the distance is away from, the vibration characteristics of the vibration detecting means themselves have different polarities at the time of rising, and therefore output signals having different polarities at the time of rising are generated. That is, more specifically, when a hit is made at a position corresponding to the mounting position, a strong pushing force is applied to the position, so that the vibration detecting means is distorted downward, and the vibration starts there. On the other hand, when the ball is hit at a position away from the mounting position, the end of the vibration detecting means is pulled toward the hitting position, so that the vibration detecting means is distorted relatively upward, and the vibration starts there. Therefore, the polarity of the output signal of the vibration detecting means at the time of rising differs depending on the hitting position. The present invention focuses on this point, and the polarity detection means detects the polarity of the rising portion of the output signal of the vibration detection means.
When a hit on the performance operator is detected, the musical tone signal generating means generates a musical tone signal, and controls the characteristic of the musical tone signal according to the polarity detected by the polarity detecting means.

As described above, in the present invention, the rising polarity of the output signal of the vibration detecting means, which is different depending on the striking position on the striking surface, is detected, and the polarity is detected according to the detected polarity. Since the characteristics of the musical tone signal are controlled, the musical tone can be controlled according to the hitting position without the need for providing the performance operator with a special sensor for detecting the hitting position.
As a result, it is possible to generate a high-quality musical tone that faithfully mimics the characteristic of the musical tone generated by the natural percussion instrument with a simple configuration and without high manufacturing cost.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of an electronic percussion instrument according to an embodiment of the present invention. This electronic percussion instrument has a plurality of pads P, and each pad P has
Tones of different types such as drums, snare drums, cymbals, etc. are assigned in advance by a setting operation on an operation panel (not shown). As shown in FIG. 2, each pad P includes a metal base portion 2 and a base portion 2.
Which is disposed on the front surface side of the striking member 3 such as a stick
And a vibration sensor 5 which is disposed in the central portion on the back surface side of the metal base portion 2 and which is composed of a piezoelectric element or the like. When the striking surface portion 4 of any one of the pads P is striked by the striking member 3, the vibration sensor 5 of the pad P starts to vibrate due to the striking force applied via the striking surface portion 4 and the base portion 2, thereby striking. An analog vibration detection signal VD having a level corresponding to the striking strength (striking speed) on the surface portion 4 is output.

The signal processing unit 6 is provided corresponding to the vibration sensor 5 of each pad P (for ease of explanation, in FIG. 1, the vibration sensor 5 of one pad P and the vibration sensor 5 corresponding thereto). Only the connection relationship with the signal processing unit 6 is shown). In the signal processing unit 6, the rectifier circuit 8 is
The waveform of the vibration detection signal VD output from the vibration sensor 5 is rectified into a waveform in only one direction (for example, the plus direction), and the low-pass filter 9 removes unnecessary high frequency components from the output signal of the rectification circuit 8. Perform the removal process. The impact detection circuit 10 detects whether or not the pad P is impacted based on the vibration detection signal VDA processed by the rectifier circuit 8 and the low-pass filter 9, and when it is detected that the pad P is impacted. Is pad-on data PO
N, a pad code PC indicating the hit pad P, and velocity data VEL indicating the hitting strength with respect to the pad P are output.

Further, in this embodiment, the pad P
An output from the vibration sensor 5 depending on whether the striking surface portion 4 of is hit at the central position corresponding to the mounting position of the vibration sensor 5 or at a peripheral position away from the mounting position of the vibration sensor 5. Focusing on the fact that the rising portions of the generated vibration detection signal VD have different polarities, the striking position on the striking surface portion 4 of the pad P is provided without providing a sensor for detecting a particular striking position on the pad P. It is possible to control the musical sound according to.

That is, as shown in a slightly exaggerated manner in FIG. 3A, when the striking surface portion 4 of the pad P is struck at the central position, the central portion of the vibration sensor 5 is
Since a strong pushing force is applied via the striking surface portion 4 and the base portion 2, the vibration sensor 5 begins to vibrate up and down after the center portion thereof is distorted downward (striking direction). In this case, the vibration sensor 5 outputs the vibration detection signal VD having the positive polarity rising portion A + as shown in FIG. 3B. On the other hand, as shown in (a) of FIG. 4, when the striking surface portion 4 of the pad P is struck at its peripheral position, the vibration sensor 4 has its end at the striking position via the striking surface portion 4 and the base portion 2. As it is pulled inward, the central part is distorted upward (reverse striking direction) and then starts to vibrate up and down. In this case, from the vibration sensor 5, (b) of FIG.
As shown in, the vibration detection signal VD having the negative polarity rising portion A- is output. As can be seen from (b) of FIG. 3 and (b) of FIG. 4, when the striking surface portion 4 is striking at its peripheral position, the striking position is far from the vibration sensor 5, so that the vibration detection signal VD The level becomes smaller than the level of the vibration detection signal VD when the striking surface portion 4 is struck at the center position.

The polarity detection circuit 12 determines the polarity of the rising portion of the vibration detection signal VD output from the vibration sensor 5,
Polarity indication data PLA indicating whether the determined polarity is positive or negative is output. The tone signal generating section 14 has a plurality of tone signal generating channels corresponding to the respective pads P, and is based on various data such as the pad-on data PON, the pad code PC, the velocity data VEL, and the polarity instruction data PLA. By reading the waveform data stored in the waveform memory 15, the tone signal is generated in the tone signal generation channel. That is, the waveform memory 1
Waveform data corresponding to the timbres assigned to the pads P are stored in the reference numeral 5. This waveform memory 1
Each waveform data stored in 5 is the first waveform data (hereinafter referred to as center position impact waveform data) WF1 to be read when the center position of the pad P is impacted.
And second waveform data (hereinafter, referred to as peripheral position impact waveform data) WF2 to be read when the peripheral position of the pad P is impacted, the center position impact waveform data WF1 and the peripheral position impact waveform data. The waveform data WF2 differs from the waveform data WF2 in the frequency characteristic, and hence in the timbre characteristic.

The waveform designating circuit 16 responds to the polarity designating data PLA provided from the polarity detecting circuit 12 with respect to the waveform data corresponding to the timbre assigned to the struck pad P, the central position striking waveform data WF1 and the peripheral position. Which of the hitting waveform data WF2 should be read out is designated. That is, the waveform designating circuit 16 designates reading of the center position hitting waveform data WF1 when the polarity designating data PLA indicates the positive polarity, and the peripheral designating position when the polarity designating data PLA indicates the negative polarity. This is to specify the reading of the hitting waveform data WF2. In this way, the tone signal generator 14 reads the center position hitting waveform data WF1 or the peripheral position hitting waveform data WF2 from the waveform memory 15, and the read waveform data shows an amplitude envelope having a rising level corresponding to the velocity data VEL. A musical tone signal is generated by adding envelope waveform data. The tone signal generated by the tone signal generator 14 in this way is acoustically sounded via the sound system SS after D / A conversion.

An example of the operation of the above embodiment will be described. For example, it is assumed that, of the plurality of pads P, the pad P to which the drum tone color is assigned is hit at the peripheral position of the hitting surface portion 4. When such a hit is made, the vibration sensor 5 provided on the pad P outputs a vibration detection signal VD having a level corresponding to the strength of the hit. In this case, since the peripheral position of the striking surface portion 4 has been hit, the vibration detection signal VD is as shown in (b) of FIG.
It has a negative polarity rising portion A-. In this way, with respect to the hit, the signal processing unit 6 outputs the pad-on data PON, the pad code PC and the velocity data VEL to the waveform memory 15 of the tone signal generating unit 14, and the waveform designating circuit 16 is also provided. On the other hand, the polarity instruction data PLA indicating that the rising portion of the vibration detection signal VD has a negative polarity is output. Thus, in the tone signal generator 14, the pad-on data PO
In response to N, out of the waveform data WF corresponding to the tone color of the drum assigned to the pad P, the peripheral position hitting waveform data WF2 is read. Then, the tone signal generator 14
Generates a tone signal by adding envelope waveform data corresponding to the velocity data XEL to the read peripheral position hitting waveform data WF2.

As described above, in this embodiment, the polarity of the rising portion of the vibration detection signal VD output from the vibration sensor 5 provided on each pad P is detected, and the waveform data to be read out according to the detected polarity. Since the selection is made, the tone color characteristic of the musical sound can be controlled according to the hitting position with respect to the pad P without providing a particular hitting position sensor.

In the above embodiment, even for the same pad, depending on whether the center position is hit or the peripheral position is hit, the center position hitting waveform data or the hitting data is read from the waveform memory. The position hitting waveform data is selectively read out to generate musical tones having different tones. However, the present invention is not limited to such waveform selection, and other methods may be used to generate musical tones having different tone color characteristics. May be generated. For example, in a tone generation method in which waveform data is processed by a low pass filter or the like, the tone color characteristic of the tone to be generated may be controlled by changing the cutoff frequency of the filter.

Further, when the intermediate portion between the central position and the peripheral position of the striking surface of the pad is struck, the central position striking waveform data and the peripheral position striking waveform data are appropriately set in the tone signal generating section. It is also possible to mix at a ratio and generate a tone signal based on the mixed waveform data. By doing so, various kinds of tones can be obtained, and it is possible to generate musical tones whose tone color characteristics change continuously (smoothly) rather than suddenly as the hitting position on the same pad changes continuously. become. Further, the characteristic of the musical sound to be controlled is not limited to the tone color characteristic as described above, and may be a tone pitch or a combination of tone colors and tone pitches.

Further, in the above embodiment, one vibration sensor is provided in the pad to detect whether the center position of the pad is hit or the peripheral position is hit. By providing a plurality of vibration sensors in a plurality of areas, the hitting position on the pad may be detected more finely, and the characteristic of the musical sound to be generated may be controlled more finely according to the hitting position detection.
Further, the characteristic of the musical sound may be controlled not only by the polarity of the rising portion of the vibration detection signal but also by the combination of the polarity and the level of the rising portion. For example, when the impact strength against the impact surface of the pad is low and the level of the rising portion of the vibration detection signal is low, in the tone signal generator,
The central position hitting waveform data and the peripheral position hitting waveform data as described above can be mixed at an appropriate ratio, and a tone signal can be generated based on the mixed waveform data.

The shape of the pad is not limited to the circular shape,
Other shapes may be used. Further, instead of the above-described vibration sensor, a strain sensor that detects the strain generated in the pad at the time of striking is used, and the polarity of the rising portion of the output signal of the strain sensor, or the polarity and level is detected, and the detection result is You may make it control the characteristic of the musical sound based on this.
Therefore, "vibration" in this specification is a concept including "distortion".

[0020]

As described above, the present invention focuses on the fact that the polarity of the output signal of the vibration detecting means at the time of rising differs depending on the hitting position. The polarity of the part is detected, and the characteristic of the musical sound is controlled according to the detected polarity.
It is possible to control the musical sound according to the hitting position on the pad. In this way, the present invention faithfully mimics the characteristics of the musical sound produced by a natural percussion instrument with a simple structure and at low cost, without the need to provide a special sensor for detecting a specific striking position. It has an excellent effect that a high quality musical sound can be generated.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the configuration of an electronic percussion instrument according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the structure of a pad in the example.

FIG. 3 is a view for explaining the relationship between the vibration of the pad and the output signal of the vibration sensor when the pad is struck at its center position.

FIG. 4 is a view for explaining the relationship between the vibration of the pad and the output signal of the vibration sensor when the pad is hit at its peripheral position.

[Explanation of symbols]

5 ... Vibration sensor, 6 ... Signal processing unit, 10 ... Impact detection circuit, 12 ... Polarity detection circuit, 14 ... Music signal generation unit, 15
... waveform memory, 16 ... waveform designating circuit, P ... pad.

Claims (2)

[Claims] 1. A performance operator having a striking surface for striking a musical tone, and a vibration of the striking surface attached to the performance operator corresponding to a predetermined position of the striking surface. Vibration detection means for generating an output signal according to, a polarity detection means for detecting the polarity of the rising portion of the output signal of the vibration detection means, and a tone signal generated in response to the detection of a hit on the performance operator, An electronic percussion instrument comprising a musical tone signal generating means for controlling the characteristic of the musical tone signal according to the polarity detected by the polarity detecting means. 2. The electronic device according to claim 1, wherein the musical tone signal generating means controls the characteristic of the musical tone signal in accordance with the polarity detected by the polarity detecting means and the level of the output signal of the vibration detecting means. Percussion instrument.