JPH087581B2 - Music control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a musical tone control device that detects a movement of a player's body, particularly a movement of a finger to control a musical tone 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, the control is limited to so-called aftertouch, 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 finger to control a musical tone, it is possible to detect an initial touch and control a musical tone 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-mentioned object, a structural feature of the present invention is that a bending amount of a finger attached to a hand is detected and a detection signal representing the bending amount of the finger is output. A sensor and a first that represents a first predetermined value and a second predetermined value that are different from each other and can be changed in magnitude.
And a reference signal generating means for generating a second reference signal, and a bending amount of the finger represented by the detection signal from a first predetermined value represented by the first reference signal to a second represented by the second reference signal. 2) A time measuring means for measuring a time to change to a predetermined value is provided, and a control signal corresponding to the measured time is output as a tone control signal.

[Operation] In the present invention configured as described above, the bending amount associated with the bending motion of the sensor finger is detected and a detection signal indicating the bending amount is output, and the reference signal generating means are different from each other and are changed in size. Generating first and second reference signals representative of possible first and second predetermined values, respectively. On the other hand, the time measuring means measures the time required for the amount of bending of the finger represented by the detection signal to change from the first predetermined value represented by the first reference signal to the second predetermined value represented by the second reference signal. . Then, since the control signal corresponding to the measurement time is output as the musical tone control signal, the musical tone control signal indicating the operation speed in the bending operation of the finger is output.

[Effects of the Invention] As described above, according to the present invention, since the musical tone control signal representing the operation speed in the bending operation of the finger is output, the musical tone control by the initial touch becomes possible, and the performance with the sensor attached is performed. A person can perform more detailed performance expression by initial touch. Further, since the first and second predetermined values are configured to be changeable, even if the musical tone control device according to the present invention is applied to various fingers, the bending amount of the fingers and the bending operation speed of the same finger can be changed for each finger. It can be adjusted, making it easier for the player to play the instrument.

[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.

Now, the detection signal of the analog signal output from the sensor 10 is input to the A / D conversion circuit 11, and the A / D conversion circuit 11 outputs the detection signal of the digital signal obtained by A / D converting the detection signal. ing. The detection signal of the digital signal output from the A / D conversion circuit 11 is input to one input terminal of each of the first and second comparators 12a and 12b.
On the other hand, the two reference signals A1 and A2 output from the reference signal generating circuit 13 are input to the other input terminals of the first and second comparators 12a and 12b, respectively. The first and second comparators 12a and 12b compare the detection signal output from the A / D conversion circuit 11 and the reference signals A1 and A2 output from the reference signal generation circuit 13, respectively, and A / D When it is determined that the detection signal of the conversion circuit 11 is large, the first and second determination signals are output.

By the way, the reference signals A1 and A2 that are the reference values at this time are
The reference signal generating circuit 13 is set to have different values. Further, the value is a binary value corresponding to the detection signal output from the sensor 10 according to a slight bending amount at the beginning of bending of the finger, that is, a small binary value within the range indicated by the detection signal. . Therefore, comparing the detection signal representing the bending amount of the finger with the two reference signals A1 and A2 by the first and second comparators 12a and 12b does not mean that the two positions at the beginning of bending the finger are to be corrected. The bending state of the finger is determined with reference to. In this case, since the reference signal A1 is set smaller than the reference signal A2, the detection signal does not exceed the reference signal A1 (this is called the first stage) and the detection signal is larger than the reference signal A1. Three position states, a state smaller than the reference signal A2 (this is referred to as the second stage) and a state larger than the reference signal A2 (this is referred to as the third stage). Can be determined as

The first output from the first and second comparators 12a and 12b
The first and second one-shot circuits (monostable multivibrators) 14a and 14b are used for the first and second determination signals, respectively.
Is input to each one-shot circuit 14a, 14
b detects the rising timing of the first and second determination signals.

The output signal of the first one-shot circuit 14a of these one-shot circuits is input as the reset input of the counter 15, while the clock pulse φ is input to the count input of the counter 15. Therefore, the counter 15 normally counts clock pulses and
When the one-shot circuit 14a detects the rising edge of the first determination signal, the count content is reset.

The count output of the counter 15 is input as the data input of the register 16, and the load terminal (LD) of the register 16 is the second one of the one-shot circuits.
The output signal of the one-shot circuit 14b is input.
Therefore, although the count data of the counter 15 which is constantly changing according to the clock pulse φ is input to the register 16, the register 16 detects the rising edge of the second determination signal in the second one-shot circuit 14b. Only the count data will be retained.

The data held in the register 16 is input to the conversion circuit 17,
After being converted into a predetermined value according to the conversion table inside the conversion circuit 17, it is output to the tone generator 18 as an initial touch response signal (hereinafter referred to as ITR signal). Note that this conversion is due to the input characteristics of the tone generator 18, and will be described in detail later.

The tone generator 18 to which the ITR signal is input is a circuit that forms and outputs a tone signal. In addition to the ITR signal output from the conversion circuit 17, the second determination signal output from the second comparator 12b is the key-on signal. (Hereinafter, referred to as a KON signal), and a detection signal indicating the amount of bending of the finger output from the A / D conversion circuit 11 is input as an aftertouch response signal (hereinafter, referred to as ATR signal). In the tone generator 18, generation of a musical tone signal is controlled by the KON signal, and musical tone elements such as pitch, tone color, and volume of the generated musical tone signal are controlled by the ITR signal and the ATR signal. ing.

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 first and second comparators 12a and 12b 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.

As described above, the finger gradually shifts from the first stage position state to the third stage position state through the second stage with reference to the two reference signals A1 and A2. Then, the first comparator 12a compares the detection signal of the bending amount of the finger with the reference signal A1, and when the detection signal becomes large (t1), that is, at the time of transition from the first stage to the second stage. The first determination signal is output. Then, the first one-shot circuit 14a detects the rising of the first determination signal, and the counter 15 is reset at the timing when the rising is detected. Since the reset counter 15 starts counting from "0", this means that the counter 15 starts measuring the elapsed time from the time t1.

On the other hand, when the finger is further bent and the position state shifts from the second stage to the third stage, the second comparator 12b detects this in the comparison between the detection signal representing the bending amount of the finger and the reference signal A2. . Then, the second comparator 12b outputs the second determination signal, and the second one-shot circuit 14b detects the rising timing (t2) of the second determination signal.
As a result, a signal is input to the load terminal of the register 16 at the same timing, and the count data of the counter 15 at that time is loaded into the register 16.

Therefore, the count data loaded into the register 16 at the time t2 becomes the data indicating the time of (t2-t1), which is the time when the finger passes between the two positions indicated by the reference signals A1 and A2. . For example, if the finger is bent quickly, this time will be short, and if the finger is bent slowly, it will be long.

However, when considering it as an initial touch response, it is common to use a control signal with a large value if it is fast and a small value if it is slow, and the input characteristics of the ITR signal in the tone generator 18 of the present embodiment will also be that same. ing. Therefore, the conversion circuit 17 converts the value of the register 16. That is, if the input value is large, a small value is output, and if the input value is small, a large value is output. The state of this conversion is shown in the graph of FIG. However, if the input characteristic of the ITR signal in the tone generator 18 is recognized as a small initial touch response with respect to a large value and is recognized as a large initial touch response with respect to a small value, naturally, this conversion is not necessary.

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.

On the other hand, the second determination signal is input to the tone generator 18 as a KON signal. Therefore, the tone generator 18 recognizes that the tone generation start timing is reached when the finger is bent to the third stage position state, that is, when the second determination signal is output. Further, after that, since the detection signal of the A / D conversion circuit 11 is input to the tone generator 18 as an ATR signal, a predetermined musical tone element is controlled by this ATR signal.

That is, the tone generator 18 starts generating a musical tone signal at the rising timing of the KON signal,
A tone signal whose tone element is controlled by the ITR signal and the ATR signal is continuously generated until the falling timing of the KON signal.

In the above embodiment, the sensor 10 obtains an analog signal with a variable resistor made of a rotary sliding material, but a member whose resistance value changes by being stretched or compressed is installed along the finger. It can also be configured to.
Further, although the sensor 10 outputs an analog signal 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, the digital signal output from the A / D conversion circuit 11 may be input to a decoder so that the first and second determination signals in the above-described embodiment can be obtained from two output lines of the decoder. it can. In such a configuration, the output of the sensor 10 is converted into a digital signal of several bits by the A / D conversion circuit 11 and then input to the decoder, and the signal is output to the output line of the decoder corresponding to the digital value. become. Therefore, by selecting two output lines corresponding to the vicinity of the beginning of bending of the finger among the output lines of the decoder, signals corresponding to the first and second determination signals are obtained, and the comparator 12 and the reference signal generation circuit are obtained. 13 is unnecessary.

Further, as the sensor 10, a sensor having a plurality of output lines corresponding to the bending angle is used, and signals from two output lines of the output lines are selected to obtain the first and second determination signals. Can also be In such a configuration, since the bending angle is directly reflected on any of the output lines, the A / D conversion circuit 11, the comparator 12, and the reference signal generation circuit 13 are unnecessary.

Further, in the conversion circuit 17 in the above embodiment, the input value and the output value are converted so as to be substantially in inverse proportion as shown in FIG. 4, but as described above, this conversion is performed by the tone generator 18. It is decided appropriately according to the input characteristics. If the conversion ratio can be changed, it can be adjusted according to the bending speed of the finger which is different for each player. In addition, when obtaining the ITR signal to indicate the moving speed of the body, not only the case where the moving speed and the output value of the ITR signal are proportional but also the case where the moving speed and the output value of the ITR signal are inversely proportional, it suffices if there is a certain correspondence between them. .

If the reference signals A1 and A2 can both be increased or decreased without changing the difference between them, the bending amount of the finger that is key-on can be adjusted,
It becomes easier to play.

Furthermore, 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, hysteresis can be detected when detecting the tone signal generation timing. Can be given a characteristic. 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.

Further, in the above-described embodiment, the two positions are used as the reference and only the speed passing between them is detected, but it is also possible to adopt a configuration in which the change state of the speed is detected using more positions as the reference. For example, there are three reference positions, which are the first position, the second position, and the third position, respectively, and the finger is the first position.
And the speed of the section is detected from the time difference of passing the second position, and similarly, the speed of the section is detected from the time difference of passing the second and third positions. Then, the acceleration may be detected from the speed difference between the two sections, and the musical tone element may be controlled by the acceleration.

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 device according to an embodiment of the present invention, FIG. 2 is a top view of a movable member used for detecting a bending amount of a finger, and FIG. 3 is a process of bending the finger. FIG. 4 is an elapsed time-detection signal relationship diagram showing the relationship between the time and the output value of the detection signal detected according to the bending amount of the finger, and FIG. 4 is an input value-output showing the conversion state in the conversion circuit shown in FIG. It is a value relationship diagram. Explanation of code 10: Sensor, 12: Comparator 15: Counter, 16: Register

Claims (1)

[Claims] 1. A sensor which is mounted on a hand and which detects a bending amount of a finger and outputs a detection signal representing the bending amount of the finger, and a first sensor and a second predetermined value which are different from each other and can be changed in magnitude. Reference signal generating means for generating first and second reference signals, and a bending amount of the finger represented by the detection signal is represented by the second reference signal from a first predetermined value represented by the first reference signal. And a time measuring means for measuring a time to change to a second predetermined value, and a control signal corresponding to the measured time is output as a musical sound control signal.