JPS63298395A - Electronic percussion instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in electronic percussion instruments such as electronic drums.

[Summary of the Invention] The present invention provides an electronic percussion instrument that electronically generates drum sounds, etc. in response to the operation of an operator, which is rich in variety by generating a percussion sound in response to a touch on the operator. It made it possible to express rhythm.

[Prior Art] Conventionally, electronic percussion instruments have been known that electronically generate percussion sounds such as drum sounds in response to operations of operators.

On the other hand, in electronic musical instruments such as electronic pianos, it is known to control musical sound characteristics such as volume and timbre depending on the strength of touch on the keys. In this case, as a touch response means for obtaining a musical tone control signal according to the strength of the key touch, a changeover type key switch having first and second fixed contacts and operating in conjunction with the key is provided, The time it takes for the switch to switch from the first fixed contact to the second fixed contact (contact transition time)
There is a known device that measures the clock pulse by counting clock pulses and extracts the count output of the value corresponding to the contact transition time as a musical tone control signal (for example, Japanese Patent Publication No. 53-55
(See Publication No. 45).

[Problems to be Solved by the Invention] According to the conventional electronic percussion instrument described in L, a short-stroke pad or the like is used as an operator, and when a switch linked to this pad is turned on, a predetermined generation pattern ( For example, a drum sound or the like is generated at a predetermined volume. For this reason, there was a problem that there was little change.

Therefore, as mentioned above, it may be possible to adopt a touch response means used in electronic pianos, etc., but an operator such as a key has a long stroke, and the key switch changes from the first fixed contact to the second fixed contact. If the touch is not pressed very deeply (or strongly) to the extent that the touch is switched, musical tones will not be generated, and therefore musical tone control according to the touch strength cannot be performed, so it is not desirable for performance operations to adopt this as is in an electronic percussion instrument.

In other words, electronic percussion instruments can be easily operated using a pad or the like as an operator, and a weak touch produces a sound corresponding to a weak touch, and a strong touch produces a sound corresponding to a strong touch. It is desirable to do this in terms of rhythmic expression.

[Means for Solving the Problems] An object of the present invention is to provide an electronic percussion instrument that is capable of performing rhythmic performances with a wide variety of variations.

The electronic percussion instrument according to the present invention includes a sound source means, an operator,
The apparatus includes a switch means, a detection means, a measurement means, first and second sound generation command means, and one sound generation control means.

The sound source means is capable of generating a desired impact sound signal such as a drum sound.

The switch means has a first and second contact pair whose states change sequentially with a time difference corresponding to the strength of touch on the operator, and the state change of the first and second contact pair is detected by the detection means. Detected.

The measuring means measures the passage of time from the time when the state change of the first pair of contacts is detected, and when the measured value reaches a predetermined value (predetermined value), the first sound generation command means generates first sound command information. Furthermore, if the first sound generation command information is not generated by the time a change in the state of the second pair of contacts is detected (that is, a change in the state of the second pair of contacts is detected before the measured value reaches a predetermined value). ), the second sound generation command means generates second sound generation command information.

The sound generation control means controls the sound source means in accordance with the first sound generation command information to generate the percussion sound signal in the first generation mode, and controls the sound source means in accordance with the second sound generation command information to generate the percussion sound signal in the first generation mode. The impact sound signal is generated in a second generation manner different from the first generation manner. Here, the first and second generation modes can be low and high volume levels, respectively.

In the above configuration, the sound generation control means controls the sound elements (for example, volume, tone, etc.) of the percussion sound signal according to the measurement value of the measurement means when controlling the sound source means according to the second sound generation command information. It may be configured to variably control.

[Function] According to the configuration of the present invention, when the operator is operated weakly or slowly to the extent that the measured value of the measuring means reaches a predetermined value, the impact sound signal is generated in the first generation mode (for example, at a relatively low volume). generated. Furthermore, if the operator is operated so strongly or quickly that the second contact pair changes state before the measured value reaches the predetermined value, the impact sound signal is generated in the second generation mode (for example, at a relatively high volume). Ru.

Therefore, as a performer, by adjusting the touch force on the operator, it is possible to express rhythms rich in variety. Furthermore, if the sound elements of the impact sound signal are variably controlled in accordance with the measured values as described above, the variations will be even richer.

[Embodiment] FIG. 1 shows the configuration of an electronic percussion instrument according to an embodiment of the present invention. In this electronic percussion instrument, the generation of various percussion sounds is controlled by a microcomputer. .

Configuration of electronic percussion instrument (Figures 1 and 2) The bus 10 includes:
Switch state detection circuit 12, central processing unit (cPU) 1
4, a program memory 16, a register group 18, a tone generator 22, etc. are connected.

The switch state detection circuit 12 includes a pad switch group 12A.
This is to detect the status of the internal switch and other switches.

The pad switch group 12A includes eight pad switches PDI-PDe arranged as shown in FIG. Each corresponds to a cymbal. In addition, each pad switch is MKII and MKH2, MK21 and MK22, as shown in Figure 1.
...Has two pairs of make contacts, MKH and MKH2. In addition, in FIG. 2, PS is a power switch.

The pad switches PDI to PD8 have the same configuration, and the configuration of PDI is shown in FIG. 2 as a representative. The pad FD is configured to self-return by a mechanism not shown, and is provided with a conductive rubber contact CG having a relatively long downward protrusion length and a conductive rubber contact CG2 having a relatively short downward protrusion length on its back surface. There is. Further, metal contacts CM and CM2 are provided opposite to these conductive rubber contacts CG and CG2, respectively, contacts CGI and CM+ constitute a first meter contact pair MKII, and contacts C
G2 and CM2 constitute a second meter contact pair MK12.

When pad FD is pressed, the first make contact pair M K +
1 turns on and if the pressing force at this time is strong, MK
Following the turning on of the second meter contact point MK12, the second meter contact pair MK12 is turned on. In this way, the first and second make contact pairs MK11 and MKH2 are turned on sequentially with a time difference corresponding to the touch strength.

The CPU 14 executes various processes for generating impact sounds according to programs stored in the program memory 16, and these processes will be described later with reference to FIGS. 3 and 4.

The register group 18 includes a large number of registers used in various processes by the CPU 14, and registers related to the present invention include first and second switch event registers REGMK+ and REGMK.
K 2 and the first to eighth counting registers TI ME
R+ ”TI ME Re and initial value register P
RECNT and a control register CNT.

Here, the register RE G M K ! and REGMK
2 are 8-bit registers, REGM
K + is the make contact pair M K + + , M K
21...Has a memory section for the Oth bit, the 1st bit...7th bit, respectively corresponding to the MKBI, and the REG
MK2 is the make contact pair MK12. MK22...
The θth bit, 1st bit, and
...has a storage section for the 7th bit.

Register TIMER+ ~TIMER
s corresponds to the pad switch FD+"PDe, and the first pad switch corresponding to each register
When the make contact pair is turned on, the initial value for down counting is set from the register PRECNT.

In the register PRECNT, an initial value to be used for down counting is set when the power is turned on.

The register CNT stores control data for controlling the volume, tone color, etc. of the impact sound.

The timer circuit 20 generates clock pulses for down counting, and each clock pulse is used as an interrupt command signal to start the interwoven routine of FIG.

The tone generator 22 includes eight sound source channels, each corresponding to a bass drum, snare drum, ... high hat cymbal, and a striking sound signal is generated from the sound source channel corresponding to the switch operated in the pad switch group 12A It is now possible to do so.

The impact sound signal from the tone generator 22 is supplied to the speaker 26 via the output amplifier 24 and converted into sound.

Main Routine (Figure 3) Figure 3 shows the processing flow of the main routine.

First, in step 30, an initialization routine is executed to initialize various registers.

For example, the values of registers REGMKI and REGMK2 are both set to O, and the values of registers TIMERI to T
The values of IME Ra are all set to 0.

The register PRECNT also has an initial value of 1, for example.
Set to 0.

Next, in step 32, the control variable i is set to 1. Then, the process moves to step 34, and it is determined whether the contact pair M K i i is on. If this judgment result is affirmative (Y), the process moves to step 36, and the (
i-1) Determine whether the bit is 1. For example, when i=1, it is determined whether the θth bit corresponding to MKll is 1 in REGMKI. If the result of this determination is negative (N), the process moves to step 38.

On step 3, the (i−
1) Set the bit to 1. Then, move on to step 40,
Register PRECN in register TI M E Ri
Set the initial value of T (10).

The determination result in step 34 was negative (N) (MK
i), the determination result of step 36 is positive (Y) (the (i-1)th bit of REGMK is 1), or step 40 is completed. If so, the process moves to step 42, and the value of i is increased by 1. As a result, when i=1, for example, i=2.

After this, in step 44, it is determined whether i>8 (is there a processing path for 8 pads)? When i=2 as described above, the determination result in step 44 becomes negative (N), and the process returns to step 34. Then, the above process is repeated until i=9. As a result, if any of the contact pairs MKII to MKH is on, the focus corresponding to the on contact pair becomes 1 in RE G M K + , and
The initial value (
lO) is set.

When i=9, the determination result in step 44 is positive (Y
), and the process moves to step 48. In this step 46, i=1.

Next, in step 48, it is determined whether the contact pair MKi2 is on. If this judgment result is positive (Y), step 5
0, register RE G M K 2th (i-1
) Determine whether the bit is 1. This judgment result is negative (N)
If so, the process moves to step 52.

In step 52, the (i-1)th bit of REGMK2 is set to 1. Then, the process moves to step 54.

Determine whether the value of T I ME Ri is 0. If the result of this determination is negative (N), the process moves to step 58.

In step 5B, the value of TIMERl is set in the register CNT. Then, the process moves to step 58, and key-on (sound generation) processing for the i-th sound source channel is performed based on the value of CNT. The initial value of TIMERi is subtracted by 1 by the down count in the interrelated routine described below. When the value of TIMERi becomes 0, the impact sound corresponding to TIMERi in the interactive routine will be lowered in volume. generated. As mentioned above, when the determination result in step 54 is negative (N), T I ME
This is a case where the pad is operated strongly or quickly enough to turn on the contact pair M12 before the value of Ri becomes 0. In this case, the value of T
A striking sound corresponding to T I ME R4 is generated at a volume corresponding to the value of M E Ri.

The determination result in step 48 was negative (N) (MK
I2 was off), the determination result of step 50 was affirmative (Y) (RE G M K 2th (
i-1) bit is 1), the determination result in step 54 is affirmative (Y) (the sound has already been generated in the interwoven routine), or step 60 is completed when step 58 is completed. , and increase the value of i by 1. Then, in step 62, it is determined whether i > 8 (the processing for 8 sound sources has been completed), and if the determination result is negative (N), the process returns to step 48, and the above processing is continued until i=9. When the repeated card i=9, the determination result in step 62 is affirmative (Y
), and the process returns to step 32. And step 32
The subsequent processing is repeated as described above.

Interwoven Routine (FIG. 4) FIG. 4 shows the processing flow of the interwoven routine, which is started every time a clock pulse is generated from the timer circuit 20.

In step 70, the value of i is set to 1. Then, the process moves to step 72, and it is determined whether T I ME Ri is O.

If the result of this determination is negative (N), the process moves to step 74.

In step 74, the value obtained by subtracting 1 from the value of T I ME R4 is set to T I M E Ri. Then, the process moves to step 76, and it is determined whether the value of T I ME Ri is O or not. If the result of this determination is affirmative (Y), the process moves to step 78.

Step? 8, key-on processing is performed for the i-th sound source channel with the value of CNT set to a. As a result, PRECN
If the initial value of T=10 is the highest volume, the impact sound is generated at the lowest volume with the CNT value=0.

The determination result in step 72 was positive (Y) (i-th
When the pad is not operated), when the determination result in step 76 is negative (N) (the down count has not been performed up to 10 times), or when step 78 is completed, the process moves to step 80. Increase the value of i by 1. Then, in step 82, it is determined whether i>8 (or the processing for 8 sound sources has been completed), and if the determination result is negative (N), step 7
2, and repeat the above process until i=9.

When i=9, the determination result in step 82 is affirmative (Y
) and returns to the routine shown in FIG.

According to the above processing, for example, the pad switch FD
, the weakest bass drum sound is generated in step 78 when M K 11 is turned on and T I ME R1 becomes O. Further, if MKI2 is turned on after MKI is turned on by strongly operating the pad switch PD2, and before TIMER1 becomes O, the TIMERI at this time is turned on in step 58.
A bass drum sound is generated at a volume corresponding to the value of . This kind of operation is the same for other pad switches,
Up to 8 notes can be produced simultaneously.

Modifications The present invention is not limited to the embodiments described above, but can be implemented in various modified forms, for example, the following changes are possible.

(1) When using a MIDI (Musical Instrument Digital Interface) system, the key-on signal and key-off signal must be transmitted simultaneously, so the key-off signal will be sent a certain period of time after the key-on signal is sent. You may also send

(2) Register T I ME Ri “T I ME
Although a certain initial value can be set for Re from the register PRECNT, different initial values may be given depending on the type of impact sound, etc. Further, the initial value may be set variably by the performer.

(3) The above-mentioned electronic percussion instruments are intended to be played manually by the performer, but by combining them with an autorhythm device, they can also be used to add percussion sounds from pad operations to the automatically progressing rhythm. It is possible.

(4) In the above embodiment, the volume level is variably controlled in accordance with the value of the register CNT in step 58, but this volume level may be set to a constant level higher than that in step 78.

(5) As a pad switch, 2
Not limited to those with paired make contacts.

A switching type having one pair of break contacts and one pair of make contacts can also be used.

(6) In the above embodiment, the volume of the impact sound is variably controlled, but not only the volume, but also the tone color and pitch of the sound element may be variably controlled. Of course, both the volume and tone (for example, volume and timbre) can be variably controlled.

[Effects of the Invention] As described above, according to the present invention, it is possible to realize a touch-responsive electronic percussion instrument, and it is possible to achieve the effect of making it possible to perform a richly varied rhythm performance. In particular, the fact that a predetermined percussion sound can be generated even with a touch force weaker than the normal touch force is very useful for adding variety to rhythm performances.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing the configuration of an electronic percussion instrument according to an embodiment of the present invention; Fig. 2 is a layout diagram showing the arrangement of switches on the panel surface of the electronic percussion instrument; Fig. 3; FIG. 4 is a flowchart showing the main routine, and FIG. 4 is a flowchart showing the interwoven routine. 10... Bus, 12A... Pad switch group, -1
2... Switch state detection circuit, 14... Central processing unit, 18... Program memory, 18... Register group, 20... Timer circuit, 22... Tone generator. jI 2 Figure (Switch distribution on the panel Figure 3 (main routine)

Claims (1)

[Claims] 1. (a) sound source means capable of generating a desired impact sound signal; (b) an operator; and (c) sequentially with a time difference corresponding to the strength of touch on the operator. a switch means having a first and second pair of contacts whose states change; (d) a detection means that detects a change of state of the first and second pairs of contacts; and (e) a state of the first pair of contacts. (f) a measuring means for measuring the passage of time from the time when a change is detected; (g) generating second sound generation command information on the condition that the first sound generation command information has not been generated by the time when a change in the state of the second pair of contacts is detected; (h) controlling the sound source means according to the first sound generation command information to generate the percussion sound signal in a first generation mode; an electronic percussion instrument comprising: a sound generation control means for controlling the sound source means in accordance with command information to generate the percussion sound signal in a second generation mode different from the first generation mode. 2. In the electronic percussion instrument according to claim 1, when the sound generation control means controls the sound source means according to the second sound generation instruction information, the sound generation control means controls the sound generation means according to the measurement value of the measurement means. An electronic percussion instrument, characterized in that it is configured to variably control sound elements of a percussion sound signal. 3. The electronic percussion instrument according to claim 1, wherein the first generation mode has a relatively low volume, and the second generation mode has a relatively high volume. An electronic percussion instrument.