JPH0242894A - Rhythm sensor - Google Patents

Abstract

PURPOSE:To recognize a rhythm without hindering music listening or performance by generating a mechanical vibration to be body-sensible by means of a vibrator according to a rhythm signal and press-contacting the vibrator to the inauditory part of a body. CONSTITUTION:A VCO 1 generates a sine wave or rectangular wave with a frequency according to a frequency setting signal from a control circuit 10, and an output is supplied to a rhythm generating circuit 2. The circuit 2 generates a pulse string signal based on a pulse interval based on the output of the VOC 1, a basic rhythm period from the circuit 11, a pulse width and pulse amplitude information, and the signal is outputted as the rhythm signal. The rhythm signal is amplified by an amplifier 3, it is supplied to a vibrating part 4, and a mechanical vibration corresponding to the rhythm signal is generated. A vibrator 41 of the vibrating part 4 is fixed to a band winding mounting member 42, wound around the arm, trunk, leg, etc., of a performer and wind- mounted to sticking members 43a and 43b.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a rhythm experience device for experiencing rhythm when listening to music or playing a musical instrument.

BACKGROUND ART A metronome is known as a device for generating rhythmic sounds. In such a rhythm sound generating device, a pendulum is caused to swing left and right at a desired period, and a rhythm sound is generated each time the pendulum passes through a predetermined swing position. There are also so-called electronic metronomes that achieve similar functions using electric circuits. In the Kagaru Den-r-Metronome, for example, electrical vibrations of a multivibrator are used to periodically control the blinking of a light emitting element, the supply of an audio signal to a speaker, and the sound quality.

A performer of a musical instrument or the like visually or audibly recognizes the cycle and strength of the rhythm using the metronome described above.

By the way, when a performer is looking at a musical score or a keyboard, visual rhythm recognition is interrupted, and when a performer is vocalizing or playing a musical instrument, auditory rhythm recognition becomes difficult.

Furthermore, it may not be desirable to mix rhythm sounds into performance sounds.

SUMMARY OF THE INVENTION Accordingly, the first objective of the present invention is to provide a rhythm experience device that allows rhythms to be recognized without interfering with musical sound listening or performance.

In order to achieve the above object, the rhythm experience device of the present invention has the following features:
a rhythm signal generating means for generating a rhythm signal carrying rhythm information, a vibrator for generating a mechanical vibration that can be felt in accordance with the rhythm signal, and a pressing contact of the vibrator against a hearingless part of the body in order to transmit the sensed vibration. and a mounting means for causing the problem to occur.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

In FIG. 4, VCO1 is a variable frequency oscillator that generates a sine wave or a rectangular wave at a frequency according to a frequency setting signal supplied from a control circuit 11, and its output is supplied to a rhythm generation circuit 2.

The rhythm generation circuit 2 has a configuration to be described later, and forms a pulse train signal based on the pulse interval based on the output of the VCOl, the basic rhythm period, pulse width, and pulse amplitude information supplied from the control circuit 11, and outputs this as a rhythm signal. do. The output of the rhythm signal is amplified by the amplifier 3 and supplied to the vibrating section 4 . The vibrating section 4 is an electrical/mechanical vibration converter, and generates mechanical vibration corresponding to a rhythm signal.

An example of the configuration of the vibrating section 4 will be explained with reference to FIG. The rhythm signal is supplied to the vibrator 41 via the connector 40. The vibrator 41 is constructed using, for example, a DC motor, a buzzer, a moving coil, a moving magnet, etc., and is fixed to a band-shaped winding mounting member 42, and the pipe mounting member is used to attach the arms, torso, and legs of the performance name, etc. It is wound by members 43a and 43b which are wound around and pasted.

Further, the vibrating section 4 may have a structure in which the vibrator 41 is attached to a belt 44 worn by the performer with a hook-shaped member 45 as shown in FIG. 2(A). In addition, the vibrator 41
If the power supply cord is taken out from the opposite position as shown in the illustration, it can be easily tucked inside the waist of pants or the like. Figure 2 (B
) is a perspective view of the vibrating section 4 of FIG. 2(A) seen from the opposite direction.

FIG. 3(A) shows still another example of the configuration of the vibrating section 4, in which the vibrator 41 is detachably attached to the adapter 46 by screwing, etc., so that the vibrator 41 can be shared. By preparing adapters of various shapes and structures, it is possible to attach the vibrating unit 4 to a desired position on the body. Fig. 3C
B) is a perspective view of the vibrating section 4 of FIG. 3(A) seen from the opposite direction.

Note that in FIGS. 1 to 3, corresponding parts of the vibrating section 4 are given the same reference numerals, and a plurality of vibrating sections 4 can be driven by the output of the amplifier 3.

In this way, the performer can individually experience the rhythm vibrations.

The control circuit 11 is configured by a microprocessor (hereinafter referred to as MPU). The MPU has keyboard 1
When a predetermined rhythm is specified from 0, data regarding the basic rhythm period 1゛B, pulse interval T, pulse width, and pulse amplitude for each rhythm stored in advance in the memory 12 are read, and the frequency and rhythm of the VCO1 are determined. Reset count of programmable counter 21 (described later) in generation circuit 2, pulse width and level of pulse width adjustment circuit 22, 2g1
Set the pulse amplitude of the circuit 23.

An example of the structure of the rhythm generating circuit 2 will be explained with reference to FIG.

In FIG. 5, the pulse output of the aforementioned VCO 1 is supplied to a programmable counter 21 that outputs a binary number. The programmable counter 21 is capable of arbitrarily setting a reset count within a predetermined range+iJ, and each time the pulse output is supplied, each level of the output terminal is made high in sequence from the left end to the right end.

When the counter counts a predetermined number of pulses corresponding to the basic rhythm cycle TB, the counter resets the count output and repeats counting from the initial value. The six-digit output of the counter is supplied to the pulse width adjustment circuit 22 as a trigger signal. The pulse width adjustment circuit 22 is provided for each digit output of the above-mentioned counter/event and is constituted by a group of timer circuits such as an f:lli stable multivibrator.

By adjusting the time constant of each timer circuit, for example, as shown in FIG. 4(C), the pulse width t, t of the three-digit output
' or is set. Note that the pulse interval T is set by adjusting the frequency of the VCO1. The external output of the pulse width adjustment circuit 22 is supplied to a level adjustment circuit 23 to adjust the amplitude of each pulse.

The level adjustment circuit 23 is provided for each output of the pulse width adjustment circuit 22 and is constituted by a plurality of variable gain amplifiers whose gain can be set within a predetermined range from 0. The level adjustment circuit 23 amplifies or attenuates the pulse signal with a gain preset for each variable gain amplifier in accordance with the rhythm pattern, and supplies the same to the addition circuit 24. The adder circuit 24 receives each output of the level adjustment circuit 24! r1 tatami and supplies it to amplifier 3.

Next, the operation of the rhythm sensation device will be explained with reference to FIGS. 6(A) to 6(D).

In FIG. 6(A), the pulse interval is set to T by the VCOI, the basic rhythm period TB, which is the basis of the rhythm pattern repeated by the programmable counter 21, is set to 3 beats (TB-3T), and the pulse width Adjustment circuit 2
2 shows the output pulse train of the adder circuit 24 when the pulse width of each channel in 2 is set to t, and the gain of each channel in the level adjustment circuit 23 is set to a constant value. When the output pulse train of the adder circuit 23 is power amplified by the amplifier 3 and supplied to the vibrating section 4,
For example, the performer performs for t time (for example, t-100 [ms]
) After receiving the vibration stimulation, a gap time (T-t) (for example, T-500 [ms]) passes, and then the vibration stimulation for time t is repeatedly received.

FIG. 6 CB) shows how the pulse level adjustment circuit 23 is adjusted in the waveform output state of FIG.
Addition circuit 2 is an example in which the amplitude of the pulse is increased to increase the stimulation level by the aforementioned oscillator, and the amplitude of the second and third pulses is suppressed to reduce the stimulation level to make it possible to recognize triple beats.
4 output pulse trains.

FIG. 6(C) shows that in the waveform output state of FIG. 6(A), the pulse width adjustment circuit 22 is adjusted to extend the width of the first pulse of the basic rhythm, and the stimulation time by the above-mentioned oscillator is extended.
An example in which triple beats can be recognized is shown by the output pulse train of the adder circuit 24.

FIG. 6(D) shows that in the waveform output state of FIG. 6(B), the pulse width adjustment circuit 22 is further adjusted to extend the amplitude and width of the first pulse of the basic rhythm, and the vibration is stimulated by the above-mentioned vibrator. The output pulse train of the adder circuit 24 shows an example in which the number of beats is increased to make triple beats recognizable.

In this way, when the rhythm signal (y) is generated by changing the pulse amplitude etc. of the pulse train signal every predetermined period and the vibrating section is driven by the rhythm signal, the rhythm is converted into mechanical vibration by the vibrator and the player is given a vibration stimulus according to a rhythm pattern.

FIG. 7 shows another embodiment of the rhythm sensation device.

In the device shown in FIG. 7, parts corresponding to those in the device shown in FIG. 4 are given the same reference numerals, and explanations of these parts will be omitted.

This embodiment is characterized in that the vibrator 41 of the vibrating section 4 is driven at a frequency with good electro-mechanical vibration conversion efficiency.

In FIG. 7, a VCO 20 is provided between the rhythm generating circuit 2 and the amplifier 3. The VCO 20 generates a carrier signal of a frequency specified by the control circuit 1] and a, and conducts the built-in gate in response to a pulse train signal (rhythm signal) as shown in FIG. 8(A) output by the rhythm generation circuit 2. Alternatively, the iJ gain of the variable gain control amplifier is modulated to output a rhythm-modulated frequency signal as shown in FIG. 8(B).

This frequency signal is power amplified by the amplifier 3 and supplied to a drive coil (not shown) of the vibrator 41. As the vibrator 41, an AC signal operated type such as a moving coil is used. A current detection resistor 21 is connected in series to the drive coil, and detects a voltage corresponding to the load current flowing through the drive coil. The detected voltage is detected by the level detection circuit 2.
2, the signal is detected and smoothed to become a detection signal Vl having a level corresponding to the load current. This detection signal V■ is supplied to the control circuit 11a.

In addition to controlling the various circuits described above, the control circuit 11a performs control operations to appropriately select the frequency of the drive signal supplied to the vibrator 41 to optimize the electro-mechanical vibration conversion efficiency of the vibrator 41. . The rest of the configuration is similar to the device shown in FIG.

Next, the frequency setting operation of the drive signal of the control circuit 11a will be explained with reference to the flowchart of FIG.

First, after the operator replaces the connector 40 and replaces the vibrating part 4, when the operator issues a replacement end signal from the keyboard °10, the MPU of the control circuit 11a detects this and starts executing the main control program (not shown). Shifting to the subroutine shown in the figure, the variable N is initialized to li! ! a (step S+). The voltage V (N) corresponding to the value of N is D/
The voltage is generated by a voltage generating means (not shown) such as an A converter, and the voltage is applied to the VCO 20 as a frequency setting command. The VCO 20 oscillates at a frequency corresponding to this voltage V (N), and a frequency signal of this frequency is supplied to the vibrating section 4 via the amplifier 3 (step S2). Wait for the predetermined time required for the oscillation frequency of the VCO 20 to stabilize (step S3)
, reads the level of the detection signal v1 supplied from the level detection circuit 22, and stores it in the storage area MEM(N) of the memory 12.

1 is added to N in order to sweep the frequency of the VCO (step S5). It is determined whether the value of N has become equal to the value N[ corresponding to the upper limit frequency of the VCO 20 (step Ss).

If it is less than NIIIX, steps 82 to S6 are repeated to increase the oscillation frequency of the VCO 20 in stages,
The level of the detection signal I corresponding to the frequency is stored in the memory 12. Therefore, the memory 12 stores frequency vs. load current characteristics (frequency vs. vibrator impedance characteristics) as shown in FIG.

If the value of N is equal to or exceeds NIIIX, a known subroutine is executed to extract the maximum value stored in MEM (N), and the current value of N is determined.
x is read (step S7). [Voltage V corresponding to Nx
(Nx) is generated in the voltage generating means, and the voltage is given to the VCO 20 as a frequency setting command (step Ss
). Thereafter, this subroutine is ended and the process returns to the main control program.

In this way, the oscillation frequency of the VCO 20 is set to the resonance frequency fO in the impedance characteristic of the vibrator, and the electro-mechanical vibration conversion efficiency is maximized.

For example, to give an example of the characteristics of a moving coil type vibrator, the resonant frequency fO is 80[11z], and the upper limit of the operating frequency is 20[KIIZ]. The earliest rhythm frequency that the operator can set is about 4 [11z], so
The moving coil type vibrator has sufficient characteristics for practical use.

In this way, in the embodiment shown in FIG. 7, the resonant frequency of the vibrator is automatically determined to 7Ip+, and a drive signal of this resonant frequency is applied to the vibrator, so that the vibrating section can be configured in various ways depending on the application. Even if it is replaced with another one, the vibration conversion efficiency is good and there is an advantage that a low output amplifier can be used.

Note that the VCO 20 is provided between the rhythm generating circuit 2 and the amplifier 3 as shown in FIG. 7, and the oscillation frequency of the VCO 20 is controlled by a PAM signal as shown in FIG. 6 (B) or (D). By supplying the output of the oscillator to the amplifier 3, the frequency of the vibrator can be changed in accordance with the rhythm, and the rhythm can be recognized. When forming a rhythm, whether to change the pulse amplitude, pulse width, frequency, or a combination of these depends on, for example, the mechanical properties of the vibrator, the structure of the vibrating part, and the vibration. It is determined by considering the experience of

Furthermore, since a single rhythm device is configured to drive a plurality of vibrating sections, it can be used by a plurality of people at the same time. Furthermore, it is also possible to synchronize a plurality of rhythm devices to the basic rhythm cycle and generate different rhythm patterns for each. In such cases, it is useful for performance practice by multiple people, ensembles with different rhythm patterns, etc. Also, for drum practice etc., it is possible to attach separate vibrating parts to the hands and feet to give different rhythm patterns. There is.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the rhythm experience device of the present invention converts rhythm signals into mechanical vibrations using a vibrator fixed to a mounting means that is brought into pressure contact with an inaudible part of the body in order to transmit bodily sensation vibrations. Since the structure allows the performer to directly experience the rhythm vibrations, the rhythm is recognized by the bodily vibrations that are not based on sight or hearing. It is preferable that the rhythm sound emitted by the player does not interfere with the performance. In addition, it does not require a sitting position like the so-called Body Sonic, so you can feel it in any position you want, it does not take up much space, and it is easy to wear.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams for explaining a configuration example of the vibrating section 4 of the rhythm sensation device of the present invention, FIG. 4 is a block circuit diagram showing an embodiment of the present invention, and FIG. , a block circuit diagram showing a configuration example of a rhythm generation circuit, FIG. 6 is a signal waveform diagram for explaining circuit operation, FIG. 7 is a block diagram showing another embodiment, and FIG. 8 is a diagram of a VCO 20. FIG. 9 is a flowchart for explaining the operation of the control circuit 11a, and FIG. 10 is a diagram showing an example of the frequency characteristics of the vibrator. Explanation of symbols of main parts 1... VCO 2... Rhythm generation circuit 3... Amplifier 4... Vibration section 4 Concave tail 5 Illustration book Otsu V tail q diagram

Claims (6)

[Claims] (1) Rhythm signal generating means that generates a rhythm signal that carries rhythm information, a vibrator that generates a mechanical vibration that can be felt in response to the rhythm signal, and a vibrator that is connected to the body to transmit the vibration that can be felt. 1. A rhythm experience device characterized by having a mounting means that is brought into pressure contact with an auditory part. (2) The rhythm experience device according to claim 1, wherein the mounting means fixes the vibrator to a band-shaped winding mounting member. (3) The rhythm experience device according to claim 1, wherein the mounting means includes a mounting member that supports the vibrator and has a hook-shaped portion. (4) The rhythm experience device according to claim 3, wherein the mounting member has a substantially flat plate shape and has a hook-shaped portion on one main surface thereof. (5) The rhythm according to claim 1, wherein the rhythm generating means modulates at least one of the waveform amplitude, waveform width, and waveform frequency of the rhythm signal at predetermined intervals to carry the rhythm information. A sensory generating device. (6) The rhythm experience device according to claim 1, wherein the rhythm generating means modulates a carrier signal having a frequency equal to the resonance frequency of the vibrator using the rhythm information to obtain the rhythm signal.