JPH087582B2 - Music control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a musical sound control device for detecting a motion of a player's body and controlling a musical sound element.

[Prior Art] Conventionally, a device of this type is disclosed in, for example, Japanese Patent Laid-Open No. 63-127773, in which a bending or twisting (rotation) amount of a joint is detected by a potentiometer, a rotary encoder, or a piezoelectric device using ultrasonic waves. It is detected by a distance measuring means composed of an element or a pressure-sensitive element provided on a fingertip inside the glove, and the musical tone element is controlled by the detected bending angle and rotation angle.

Therefore, it has become possible to control musical sound elements by bending or rotating the joints of the body while performing dance or rhythmic gymnastics.

[Problems to be Solved by the Invention] By the way, aftertouch (aftertouch response) is applied to electronic musical instruments such as electronic organs and synthesizers.
The tone elements are controlled with or initial touch (initial touch response). Here, the aftertouch is a control element for the position such as the depth (position) of the key when pressing the keyboard and the pressure, and the initial touch is
It is a control element for the speed of key depression, that is, the speed.

However, in the above-described conventional musical tone control device, since the musical tone elements are controlled based on the angle when the joint or the like is bent or rotated, only the so-called after-touch control is performed, and the musical tone elements are controlled by the initial touch. I couldn't. For this reason, it has been impossible to reflect a more delicate performance expression by the performer in the musical sound.

The present invention has been made to solve the above problems, and in detecting a movement of a player's body to control a musical sound, it is possible to detect an initial touch and control a musical sound element. It is an object of the present invention to provide a musical tone control device capable of coping with the more delicate performance expression of.

[Means for Solving the Problems] In order to achieve the above object, the structural feature of the present invention is that a motion detection that detects a motion of a part of a human body and outputs a detection signal indicating the motion amount thereof. Means (10), reference signal generating means (13) for outputting a reference signal representing the reference value of the movement amount of a part of the body, reference value varying means (14) for adjusting the reference value, and movement detecting means. Holding means (12,15,16) for holding the movement amount represented by the detection signal from the movement detection means after a predetermined time has elapsed from the time when the movement amount represented by the detection signal from passes the reference value; And outputting a control signal corresponding to the held operation amount as a tone control signal.

[Operation] In the present invention configured as described above, when the performer moves a part of the body, the motion amount is detected by the motion detecting means, and the detected motion amount is the reference from the reference signal generating means. After a lapse of a predetermined time from the time when the reference value represented by the signal is passed, the holding means holds the detected operation amount, and a control signal corresponding to the held operation amount is output as a tone control signal. As a result, the amount of movement held by the holding means represents the movement speed of the body in the movement state of the body corresponding to the reference value, and it is possible to control the musical sound element by so-called initial touch. Further, since the reference value can be adjusted by the reference value varying means, it is possible to obtain a control signal corresponding to the movement speed of the body in any movement state of the body.

[Effects of the Invention] As can be understood from the above description of the operation, according to the present invention, it is possible to control a musical sound in accordance with the movement speed of the body, that is, the initial touch, and the performer can perform a more delicate performance using the initial touch. Can realize the expression. Further, if the present invention is applied to a conventional musical sound control device having the same motion detecting means as that of the present invention, it is possible to control a new musical sound element by initial touch simply by fetching the detection signal from the motion detecting means. Therefore, the effect of the present invention can be enjoyed by a simple improvement over the conventional device.

Furthermore, according to the present invention, since it is possible to adjust the reference value in various ways, even if the musical tone control device according to the present invention is applied to different parts of the body, such as various different fingers, the parts can be adjusted to the same parts. It becomes possible to detect an appropriate operation speed, that is, an initial touch and appropriately control a musical sound based on the detection.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic structure of a musical sound control device according to an embodiment of the present invention, and FIG. 2 shows a movable member used when the bending amount of a finger is detected by the musical sound control device. There is.

In this embodiment, the sensor 10 has a movable member attached along the finger, and the angle of the two lines of the straight line connecting the palm and the base of the finger and the line connecting the base of the finger and the tip of the finger Bending amount. That is, this angle is detected, converted into an electric quantity, and output to the A / D conversion circuit 11 as an analog signal representing the bending amount of the finger.

As shown in FIG. 2, a more specific structure of the movable member of the sensor 10 is as follows. Inside the double-structured glove 20, the base 30 is arranged along the palm, and the base 30 is provided at one end. A fixed connecting portion 40 and a rotating portion that is supported by the other end of the connecting portion 40 so as to be rotatable in the lateral direction and is provided along each finger.
It is configured with 50 and. Further, in detail, the connecting portion 40 has a so-called hinge structure in which the rotating members 41 and 42 are coupled via the penetrating shaft 43. Further, a variable resistor using a rotary sliding material is provided between the rotating members 41 and 42, and rotation is performed by detecting the resistance value indicated by the variable resistor via the lead wires 44a to 44e. Member 41 and
42 relative angles can be detected.

With this configuration, the rotating unit 50 is rotatable with respect to the base 30 with the connecting unit 40 as a fulcrum, and the rotation angle can be detected by the variable resistor.
Of course, the rotating member 50 rotates following the bending of the finger.

Therefore, in each sensor 10, a current is supplied to the variable resistor via the lead wire 44, and a voltage drop generated at that time is used as a detection signal. It should be noted that this movable member can accommodate up to five sensors 10. In addition, each sensor
The output of 10 is proportional to the bending amount of the finger.

The detection signal of the analog signal output from the sensor 10 is
It is input to the A / D conversion circuit 11, and the A / D conversion circuit 11 outputs a detection signal of a digital signal obtained by A / D converting the detection signal. Therefore, thereafter, the bending amount of the finger is treated as a digital value.

The detection signal of the A / D conversion circuit 11 is input to the comparator 12 to determine whether the finger is bent to a certain position. At the same time, a reference signal serving as a reference for comparison is input from the reference signal generation circuit 13 to the comparator 12. That is, the comparator 12 is input with the detection signal indicating the amount of bending of the finger and the reference signal, and the comparator 12 compares the two signals and outputs the determination signal when the detection signal is larger. . The reference signal at this time is a signal having a value corresponding to the bending of the finger, which is also a relatively small value corresponding to the vicinity of the beginning of bending the finger. The magnitude of the reference signal output by the reference signal generation circuit 13 can be adjusted by the variable circuit 14.

The determination signal output from the comparator 12 is input to the reset terminal R of the timer circuit 15. The timer circuit 15 is a circuit that starts counting the clock signal φ input to the clock terminal CK from the rising time of the signal input to the reset terminal R and determines whether a predetermined time t0 has elapsed. Therefore, when the judgment signal is output from the comparator 12,
In other words, the counting operation is started when the finger is bent beyond a certain position, and when a predetermined number of clocks is counted, a timer signal is output to notify that a certain time t0 has elapsed. In this case, since the amount of bending of the finger is detected at a relatively early stage when the finger is bent, the speed thereof is detected, and therefore the time for counting the clock is a minute time that meets the requirement.

The timer signal output from the timer circuit 15 is input to the load terminal LD of the latch circuit 16, and the data input terminal of the latch circuit 16 has the A / D conversion circuit 11 described above.
The output signal of is input. Then, the latch circuit 16
Is the A / D conversion circuit 1 at the time when the timer signal is input.
Latch the output signal of 1. Therefore, the data latched in the latch circuit 16 is the amount of bending of the finger when a predetermined minute time elapses after the finger bends past a certain position.

The bending amount of the finger latched by the latch circuit 16 is calculated by the conversion circuit 17
Is input to The conversion circuit 17 converts the output data of the latch circuit 16 into an initial touch response signal (hereinafter referred to as ITR).
It is called a signal. ) Is a conversion table. The conversion table is necessary when the variable circuit 14 is provided as will be described later, and also the tone generator 1 to which the ITR signal is input.
It may be necessary depending on the input characteristics of 8. On the contrary, when the variable circuit 14 is omitted and the input characteristic of the tone generator 18 matches the output characteristic of the latch circuit 16, it is unnecessary.

The latch data of the latch circuit 16 passed through the conversion circuit 17 is input to the tone generator 18 as an ITR signal.

In addition to this ITR signal, the tone generator 18 receives a key-on signal (hereinafter referred to as a KON signal) and an after-touch response signal (hereinafter referred to as an ATR signal) described below.
Is input and the generation of the musical tone signal is controlled by the KON signal, and the musical tone elements such as the pitch, tone color and volume of the generated musical tone signal are controlled by the ITR signal and the ATR signal. .

In order to obtain the KON signal, the judgment signal of the comparator 12 is input to the delay circuit 19 in this embodiment. At this time, the delay circuit
The delay time at 19 is about the same as the count time at the timer circuit 15 or slightly slower. This is because the judgment signal is output from the comparator 12 so that the timer circuit 15 measures a certain time, and then the judgment signal is output from the delay circuit 19 when the latch circuit 16 latches. This is because Therefore, after the latch data in the latch circuit 16 is updated, the determination signal is input to the tone generator 18 as a KON signal.

Regarding the ATR signal, the output of the A / D conversion circuit 11 is directly input to the tone generator 18.

Next, the operation of the musical sound control device of the present embodiment having the above configuration will be described.

When the player bends his / her finger with the movable member shown in FIG. 2 attached to his / her hand, the sensor 10 detects the bending amount and outputs a detection signal representing the bending amount. Then, this detection signal is converted into a digital detection signal by the A / D conversion circuit 11, and is input to the comparator 12, the latch circuit 16, and the tone generator 18.

Here, referring to FIG. 3, the same figure shows the elapsed time when performing the operation of bending a finger (which is assumed to be substantially proportional to the bending amount) and the bending amount detected with the passage of time. Shows the relationship with the output value of the detection signal.

Although the output of the sensor 10 gradually increases as the finger is bent, it is assumed that the output value of the sensor 10 becomes A0 at the position where the comparator 12 recognizes that the finger has started to be bent. Conversely, when comparing the output signal of the sensor 10 and the reference signal, it is possible to detect whether or not the finger has begun to be bent by comparing the two signals with the value of the reference signal set to A0. For the sake of simplicity of explanation, the output value of the sensor 10 is
The output value of the A / D conversion circuit 11 is also meant in a broad sense.

Now suppose you try to bend your finger relatively slowly. Sensor
The output value of 10 gradually increases, and the output value becomes A0 at time t1.
Let's say. At this time, the comparator 12 outputs a determination signal, and the timer circuit 15 starts its operation at the rising edge thereof. That is, the rising edge of the determination signal indicates the reference time (the time when it is determined that the finger has started to be bent and the position for detecting this has been exceeded).

The finger is further bent, and the output value of the sensor 10 also rises. Since the timer time measured by the timer circuit 15 is t0, the time
The latch circuit 16 latches the output value of the sensor 10 by the timer signal output from the timer circuit 15 at t1 + t0. At this time, since the finger is bent slowly, the amount of displacement of the finger bent during the timer time t0 is not so large, and the output value of the sensor 10 is A1.

On the other hand, suppose that you try to bend your finger quickly next. For convenience of understanding, in this case as well, it is assumed that the output value of the sensor 10 becomes A0 at time t1.

The timer circuit 15 starts operating from time t1, and starts measuring the same time t0 as before. However, this time, since the fingers are bent fast, many fingers can be bent during the same time t0. Then, it is assumed that the output value of the sensor 10 at the time t1 + t0 is also larger than before and the output of the sensor 10 latched by the latch circuit 16 becomes A2.

In such a case, the amount of displacement of the finger is (A1
-A0), and when fast bending corresponds to (A2-A0), the value of A0 is fixed, so the displacement of the finger is also based on the latch data (A2 or A1) of the latch circuit 16. I understand. Therefore, the displacement amount of the finger can be detected by A2 or A1, and this displacement amount is the displacement amount per predetermined time t0. Therefore, the displacement amount derived from A2 or A1 has a proportional relationship with the speed. .

As can be seen from the above, the latch data of the latch circuit 16 has a proportional relationship to the speed of bending the finger, so if the input data of the tone generator 18 is adjusted via the conversion circuit 17, This latch data is ITR
Become a signal.

By the way, the reference value serving as a reference for comparison in the comparator 12 can be adjusted by the variable circuit 14, but if the reference value is changed, it is necessary to change the conversion table in the conversion circuit 17.

FIG. 4 shows how the output value of the latch circuit 16 changes when the reference value is changed and the finger is bent at the same speed.

Assuming that the first reference value is A01, the time when the bending amount of the finger detected by the sensor 10 corresponds to A01 is t11,
It is assumed that the output value of the sensor 10 is A11 at time t11 + t0 when the certain time t0 has elapsed. On the other hand, the standard value is A01
If you change to a larger A02, the output value of sensor 10 will be A02.
It becomes larger at time t12, which is later than time t11. This is because the finger is bent at the same speed, and the output value of the sensor 10 becomes larger at a later time. Similarly, the bending amount of the finger at the time t12 + t0 after the time t0 has passed is at least larger than the bending amount of the finger at the time t11 + t0, and the output value of the sensor 10 is A12 larger than A11. That is, when the reference value is increased, the time when the reference value is exceeded is delayed, so that the data latched by the latch circuit 16 also becomes a large value. Therefore, the conversion table in the conversion circuit 17 is changed when the reference value is changed so that such a situation does not occur. That is, if the reference value is increased, the ratio of the output value to the input value is decreased, and if the reference value is decreased, the ratio is increased. This is shown in FIG. Note that specifically, the conversion circuit 17 may be configured by a ROM, the data of the latch circuit 16 and the data of the variable circuit 14 may be used as address inputs, and the read data may be converted data. This allows
Different addresses are referred to according to the data output by the variable circuit 14, and a plurality of conversion tables corresponding to the output data of the variable circuit 14 are prepared.

Since the ITR signal is obtained from the conversion circuit 17 as described above, the performer can perform a musical performance expression utilizing the initial touch response.

At this time, since the comparator 12 detects whether or not the finger is bent beyond a certain position, it is possible to use the determination signal as the KON signal. However, the new data is latched in the latch circuit 16 only after the timer circuit 15 performs the counting operation at the rising edge of the determination signal. Therefore, if the determination signal is used as the KON signal as it is, immediately after the KON signal is output, the latch data latched when the previous ITR signal is obtained in the latch circuit 16 is input to the tone generator 18. For this reason,
The judgment signal is delayed by the delay circuit 19, and the delay time must be at least the count time of the timer circuit 15 plus the delay time by the conversion circuit 17.

Regarding the ATR signal, since the start of the tone signal generation is controlled by the KON signal, there is no problem even if it is output before the KON signal is generated, and it is output directly from the A / D conversion circuit 11 to the tone generator 18. ing.

As a result, the tone generator 18 starts generating a musical tone signal at the rising timing of the KON signal,
A musical tone signal whose musical tone elements are controlled by the ITR signal and the ATR signal is continuously generated until a predetermined time elapses from the fall of the KON signal and the attenuation of the musical tone ends.

In the above embodiment, the timer circuit 15 for counting the clock and measuring the time is provided, but the timer circuit is not limited to the timer circuit 15 and may be configured by a known time measuring means. For example, a delay circuit that delays the output of the comparator for a predetermined time may be provided to measure a fixed time. It is also possible to use the time from the rise in the monostable multivibrator to the return to the steady state. In this case,
By detecting a so-called falling edge, it can be determined that a certain time has elapsed.

Although the sensor 10 obtains an analog signal with a variable resistor made of a rotary sliding material, a member whose resistance value changes by being stretched or compressed can be installed along a finger. . Further, although the analog signal is output to indicate the bending condition of the finger, the A / D conversion circuit 11 may be omitted as a digital encoder that outputs a digital signal. Further, if the detection signal is output after the predetermined bending amount, the comparator 12 does not need to compare with the reference signal.

In addition to this, a sensor having a plurality of output lines corresponding to the bending angle is used as the sensor 10, and a signal from one of the output lines is selected to obtain the above-mentioned determination signal, and each output is output. It is also possible to connect the line to the encoder and latch the encoded output by the latch circuit 16. In such a configuration, since the bending angle is directly reflected on one of the output lines, the A / D conversion circuit 11 and the comparator 1
2 and the reference signal generation circuit 13 are unnecessary.

As described above, the conversion circuit 17 may be necessary or unnecessary depending on the presence or absence of the variable circuit 14 and the input characteristics of the tone generator 18. And the structure can also be changed into various things. For example, when the reference signal A0 is subtracted from the latch data of the latch circuit 16 to obtain a signal proportional to the speed, the reference signal of the reference signal generating circuit 13 (or the variable circuit 14 outputs the latch data as shown in FIG. 6). It is also possible to adopt a configuration in which the information of the reference signal value that is set) is subtracted. In addition, as shown in FIG. 7, a conversion circuit that adds a characteristic curve to the output of this subtraction circuit is added,
It is possible to make the R signal sensitive and to obtain free characteristics such as outputting a slow ITR signal in the high speed region. In addition, if the conversion ratio can be changed,
It can be adjusted according to the bending speed of the finger which is different for each performer. In addition, when obtaining the ITR signal to indicate the moving speed of the body, not only when the moving speed and the output value of the ITR signal have a comparative relationship but also when there is an inverse proportional relationship. It only needs to have a certain correspondence.

By inputting the KON signal to the reference signal generation circuit 13 and configuring the reference signal A2 to have a slightly smaller value during the period when the KON signal is being output, the key is turned on when the generation timing of the tone signal is detected.・ Hysteresis characteristics can be added to the OFF detection. That is, the reference value when the KON signal changes from ON to OFF is slightly smaller than the reference value when the KON signal changes from OFF to ON, and erroneous determination is reduced.

In addition, in the above-described embodiment, a sensor is provided for each finger to form a device made up of the above circuits, and in the case of handling five fingers, five circuits are arranged in parallel to deal with it. Alternatively, the outputs of a plurality of sensors may be time-division multiplexed, and a single processing circuit for performing subsequent determinations by time-division processing may be used.

[Brief description of drawings]

FIG. 1 is a block diagram of a musical sound control apparatus according to an embodiment of the present invention, FIG. 2 is a top view of a movable member used when detecting a bending amount of a finger, and FIGS. FIG. 5 is a ratio diagram showing a conversion ratio in the conversion circuit, FIG. 5 is a ratio diagram showing a conversion ratio in the conversion circuit, FIG. 6 and FIG. It is a circuit diagram which shows a modification. Explanation of code 10: Sensor, 12: Comparator 15: Timer circuit, 16: Latch circuit

Claims (1)

[Claims] 1. A motion detecting means for detecting a motion of a part of a human body and outputting a detection signal representing the motion amount thereof, and a reference for outputting a reference signal representing a reference value of the motion amount of the part of the body. A signal generating means, a reference value varying means for adjusting the reference value; Holding means for holding the movement amount represented by the detection signal, and outputting a control signal corresponding to the held movement amount as a tone control signal.