JPH06175652A - Parameter input device and playing operation device of electronic musical instrument - Google Patents

Abstract

PURPOSE:To improve the operability by inputting timbre parameters and parameters of effects for the electronic musical instrument on a tablet. CONSTITUTION:Operation points on the tablet are sampled and vectors Vk connecting respective sampling points Pk (k=0, 1, 2...) are assumed. A parameter increased or decreased corresponding to the angle of rotation of the direction of a current vector to the direction of the vector V0 in the initial motion of operation. Whether the parameter value is to be increased or decreased depends upon the rotational direction of the operation points. The rotational direction of the operation points is detected from differences (variation) in inclination of the vectors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parameter input device for setting a tone color parameter or the like of a sound source in an electronic musical instrument, and a musical performance operating device for an electronic musical instrument for controlling a musical effect in the electronic musical instrument. .

[0002]

2. Description of the Related Art Conventionally, in electronic musical instruments, the characteristics of a filter that gives a timbre change to a waveform signal and the envelope shape when an envelope is added to a waveform are set by various sound source parameters, and this sound source parameter is often changed. There is one that can set the tone of. In addition, when changing the setting of the sound source parameter, there is a method in which the parameter value is displayed on a display screen and an operator such as a jog dial is operated to change the parameter.

According to the operation of the jog dial, the direction of increase or decrease of the parameter value is determined by the rotation direction of the dial, and the parameter value changes according to the rotation angle of the dial. There is an advantage that it is easier to perceptually detect the amount of change.

However, since the jog dial is designed to rotate a dial of a fixed size about a fixed axis, for example, when turning the dial with a finger, it must be operated so as to draw a fixed perfect circle. There is a restriction on the operation of turning the dial, such as when it must be performed, and there is a problem in terms of operability.

By the way, in an electronic musical instrument, a two-dimensional surface input operator such as a tablet is used as a performance operator, and a sliding operation by an input rod or the like on the operation surface is performed by, for example, a bowed string operation or a wind instrument in a stringed instrument. For instruments that require a relatively long-time playing operation, such as a stringed instrument or a wind instrument, it is possible to simulate the playing operation by responding to the blowing action in the instrument. Proposed.

Such a two-dimensional surface input operator can detect the position of the operation point on the operation surface, and if any operation is performed on the operation surface, information corresponding to the operation position is obtained. Since such information can be obtained, an input device with good operability can be obtained by properly processing these position information.

[0007]

SUMMARY OF THE INVENTION The present invention focuses on such a two-dimensional surface input operator, and provides a parameter input device and a performance operator with reduced operability and good operability. And

[0008]

A parameter input device for an electronic musical instrument according to the present invention, which has been made to solve the above-mentioned problems,
Two-dimensional surface input operation means for outputting position information of the operation point on the operation surface, and detecting a moving direction of the operation point moving on the operation surface based on the position information output from the two-dimensional surface input operation means Moving direction detecting means, and parameter control means for increasing or decreasing the parameters of the sound source in the electronic musical instrument according to the rotation angle of the moving direction of the operation point on the operation surface,
It is characterized by having.

In addition, the electronic musical instrument performance operating device of the present invention includes a two-dimensional surface input operating means for outputting position information of an operating point on the operating surface and position information output from the two-dimensional surface input operating means. Based on the movement direction detecting means for detecting the movement direction of the operation point moving on the operation surface based on the operation surface, and the parameter control means for increasing / decreasing the effect parameter in the electronic musical instrument according to the rotation angle of the operation point moving direction on the operation surface. And are provided.

[0010]

In the electronic musical instrument parameter input device and electronic musical instrument performance operating device of the present invention, when an arcuate curve is drawn on the operating surface of the two-dimensional surface input operating means, the rotation angle of the operating point in the moving direction is It increases or decreases according to the rotation direction, and the sound source parameter or the effect parameter increases or decreases accordingly. Here, since the rotation angle of the operation point in the moving direction can be detected regardless of the position on the operation surface where a curve is drawn, the operation can be performed without being limited to the operation position. Further, the parameters can be increased or decreased without accurately drawing the circle. Further, when operated at the same speed, the temporal change amount of the rotation angle becomes large when the curvature of the drawn curve is large, and the temporal change amount becomes small when the curvature is small. That is, it is possible to draw a small circle to change the parameter quickly, and to draw a large circle to change the parameter slowly.

The parameter input device of the present invention can be applied to an electronic musical instrument having a two-dimensional surface input operation means as a performance operator. In this case, the performance operation and the parameter input operation are performed on the same two-dimensional surface. Since it can be used for both positions, it is possible to switch smoothly between playing operation and parameter input operation, for example, while switching between playing mode and parameter setting mode with one hand without releasing the hand on the playing operation side. it can.

[0012]

1 is a block diagram of an electronic musical instrument to which the present invention is applied. In the figure, CPU1, working RAM
2. The program ROM 3 constitutes a microcomputer, and the CPU 1 controls the entire electronic musical instrument using the working area of the working RAM 2 based on the control program stored in the program ROM 3.
At the time of performance, performance information such as a key code and a key-on signal is fetched from the keyboard 4, and a tone signal is generated by the tone generator circuit 5,
The sound system 6 produces musical tones.

The tone generator circuit 5 generates a tone signal in accordance with the tone color parameter set by the CPU 1. By changing the tone color parameter of the tone generator circuit 5, the tone color or the like changes. The tone color parameter setting is changed by the parameter input device according to the embodiment of the present invention. In this embodiment, the parameter setting mode is selected with the mode setting switch 7, the parameter value is displayed on the display 8, and the parameter is increased or decreased by operating the tablet 9 as the two-dimensional surface input operation means.

The tablet 9 outputs a signal indicating whether or not the operating surface is pressed, and the coordinates of the operating point, which is the pressing point on the operating surface, are output based on the XY coordinate system set on the operating surface. Are output as coordinate signals X and Y. Also,
The CPU 1 performs tablet event processing, which will be described later, based on the interrupt clock generated by the interrupt clock generator 10, fetches coordinate signals X and Y of the tablet 9, performs various calculations, and increases or decreases the tone color parameter of the tone generator circuit 5.

In this embodiment, when a curve is drawn clockwise on the operation surface of the tablet 9 with a finger or an input stick, the parameter is increased, and when a curve is drawn counterclockwise, the parameter is decreased. There is. Further, as shown in FIG. 2, the azimuth angle Θ of the current operation point P _{n in} the movement direction B is set as the rotation angle Θ of the curve C with reference to the movement direction A of the operation point P ₀ at the initial movement of the input operation. The current parameter value is obtained by changing the parameter value at the time of initial movement by an amount corresponding to the rotation angle Θ. In this embodiment, the rotation angle Θ when turning clockwise as shown by the curve C and a positive value when turning clockwise as shown by the curve C corresponding to the increase or decrease of the parameter value, and when turning left as shown by the curve C ′ are shown. The rotation angle Θ'is a negative value.

Next, a method of calculating such a rotation angle and a method of determining the turning direction will be described. Now, when the curve C as shown in FIG. 3 is drawn, the XY of the discontinuous sampling points P _k (k = 0, 1, 2, ...) On the curve C are sampled by the CPU 1 by sampling the coordinate signals X and Y. The coordinates are obtained. The sampling interval is determined by the interrupt interval by the interrupt clock generation circuit 10, but is set to a predetermined interval in consideration of the resolution of the tablet 9 and the calculation processing time. Note that in FIG. 3, the intervals between sampling points are exaggerated widely for the sake of clarity.

[0017] Thus, for each sampling point P _k vectors to the next sampling point P _{k + 1} and the end point (V
₀ , V ₁ , V ₂ , ...) Assuming that the curve C is approximated and the angles θ _k (hereinafter referred to as partial angles) formed by adjacent vectors are sequentially added, the first vector V is added.
_The angle formed by ₀ and the vector V _n-1 reaching the current operation point P _n is obtained as the current rotation angle Θ.

As shown in FIG. 5, adjacent vectors V _n and V _{n + 1} have coordinates (x _n , y _n ), (x x) of three points P _n , P _{n + 1} , P _{n + 2. n + 1} , y _{n + 1} ), (x _{n + 2} , y
_{n + 2} ), and the partial angle θ _n formed by the vectors V _n and V _{n + 1} is calculated from the relation of the inner product of the vectors as shown in the following equation (1) at the respective coordinates (x _n , y _n ), ( x _{n + 1} , y
_{n + 1} ), ( _{xn + 2} , yn _{+ 2} ).

[Equation 1]

By the way, as described above, the rotation angle Θ has a positive value in the clockwise direction and a negative value in the counterclockwise direction.
According to, the partial angle θ _n is irrespective of whether the second vector V _{n + 1} is facing left or right with respect to the direction of the first vector V _n , that is, whether the curve is left or right. Regardless of whether you are turning to, you can always get only a positive value. Therefore, by determining the turning direction of the curve as follows, when turning right, the partial angle θ _n is added, and when turning left, the partial angle θ _n is subtracted.

If, for example, each vector in FIG. 3 is translated in such a manner that the respective starting points coincide with each other at the origin as shown in FIG. 4, the coordinate system of the destination represents the components of each vector. Coordinate system (hereinafter referred to as azimuth coordinate system)
become. Then, when the curve on the tablet turns clockwise, the vector in this azimuth coordinate system rotates clockwise around the origin, and when the curve turns counterclockwise, it turns counterclockwise. . At this time, the inclination of the vector that enters the first quadrant (I) and the third quadrant (III) in the azimuth coordinate system is positive, and the second quadrant (II) and the fourth quadrant (I) are positive.
The slope of the vector that enters V) becomes negative.

Therefore, when the curve is turned to the right on the tablet and the vector moves in the first and fourth quadrants and the third and second quadrants of the azimuth coordinate system, the gradient of the vector decreases and the curve becomes When turning left on the tablet and moving in the second and third quadrants and the fourth and first quadrants of the azimuth coordinate system, the inclination of the vector increases. Therefore, the turning direction is detected based on the change in the inclination of this vector.

However, when the vector crosses the Y axis of the azimuth coordinate system when the vector changes from the previous vector to the current vector, the inclination of the vector changes from a negative value having a large absolute value when rotating clockwise. It increases to a large positive value, and when it rotates counterclockwise, it decreases from a large positive value to a large negative absolute value. Note that the vector is Y in the azimuth coordinate system in this way.
The case of crossing the axis is hereinafter referred to as a singular point.

[0023] Therefore, with determined by the difference of the slope of the time from the first vector V _n is changed second to the vector V _{n + 1} of (a) the following equation (2), the current vector is that of singularity It is determined whether or not there is a turn direction. That is, when it is not a singular point, it turns out to be a left turn if a> 0, and turns to a right turn if a <0. On the other hand, in the case of a singular point, conversely, if a> 0, it is determined to be a right turn and
If it is 0, it turns out to be a left turn.

[Equation 2]

At the singular point, the sign of the X component is inverted when changing from the first vector V _n to the second vector V _{n + 1} , so the value obtained by the following equation (3) ( si
If ng) is positive, it is not a singular point, and if it is negative, it is a singular point.

[Equation 3]

The following table 1 shows the conditions for determining the turning direction of the curve as described above.

[Table 1]

FIG. 6 is a flowchart of the main routine of the control program, and FIGS. 7 and 8 are flowcharts of tablet event processing. The operation of the embodiment will be described based on each flowchart. In the following description and each flowchart, the data used for control will be represented by the following labels. posix: X coordinate output data of the tablet posii: Y coordinate output data of the tablet n: Sampling point (coordinate value) number m: Partial angle number x [i]: X coordinate value of number i y [i]: Number i Y coordinate value θ [i]: Partial angle of number i θsum: Rotation angle (Θ) resolution: Angle corresponding to increment / decrement of parameter value (resolution) num [i]: Parameter value corresponding to number i diff. num: Difference in parameter value

First, when the power is turned on, the CPU 1 starts the main processing shown in FIG. 6, performs an initial setting such as presetting of various data in step S1, and the keyboard 4 in step S2.
The key event is detected to perform the tone generation process or the mute process, and in step S3, the process such as mode switching is performed according to the operation state of the mode setting switch 7, and the process returns to step S2.

The tablet event process of FIG. 7 is started at a constant interval by the interrupt clock from the interrupt clock generator 10, and the mode currently set is determined in step S11. If it is the effect setting mode, step S12 is executed.
In step S13, the effect data is set and the process returns to the original process. In the tone color setting mode, the tone color data is set in step S13 and the process returns to the original process. Then, in the parameter setting mode, the processing from step S14 is performed.

In step S14, it is determined based on the output signal of the tablet 9 whether or not the operation input is currently made. If the operation input has not been made, the process returns as it is. If the operation input is made, the first input event is made in step S15. Or not. Whether or not this is the first input event is to determine whether or not it is the first operation input after the output signal of the tablet 9 disappears, and when the event occurs and when the event disappears. A predetermined flag or the like may be inverted and stored in the memory.

If it is the first input event, step S1
6, the sampling point number n, the partial angle number m, and the rotation angle θsum are reset, and the process proceeds to step S17. If the event is not the first input event, the current XY coordinate data p output from the tablet 9 in step S17.
osix and pose are respectively taken into the array variables x [n] and y [n], and the process proceeds to step S18.

In step S18, it is determined whether or not n> 0. If n> 0, the first coordinate data posi
Since it is a state in which x and pose are taken in, step S
In step n, n is incremented to return to the original routine. If n> 0, the second and subsequent coordinate data p
Since the osix and the pose are taken in, it is determined in step S20 whether or not the coordinate data has changed from the previous coordinate data, that is, whether or not the operation of the tablet 9 has changed. The routine is returned to, and if it is changed, it is determined in step S21 whether n> 1.

In step S21, if n> 1 is not satisfied, the second coordinate data posix, posey has been fetched. Therefore, in step S19, n is incremented to return to the original routine, and if n> 1, 3 Since the coordinate data posix and posii after the th-th coordinate are fetched, the rotation angle θ [m] is calculated based on the above equation (2) in step S22, and the process proceeds to step S23. Thus, the rotation angle θ [m] is calculated after the coordinate data of the three different sampling points is fetched.

In step S23, the difference (a) between the vector inclinations is calculated based on the above-mentioned equation (3), and in step S24, the value (for determining the singular point based on the above-mentioned equation (4) ( sign) is calculated and step S in FIG.
Go to 25.

In step S25 of FIG. 8, it is determined whether or not the right turning condition is satisfied based on the conditions in Table 1 above. If the condition is satisfied, the right turning is performed.
In 6 the current rotation angle θsum to the current partial angle θ
[M] is added to update the rotation angle θsum, and the process proceeds to step S28. If the condition is not satisfied, the vehicle is turning left. Therefore, in step S27, the current rotation angle θsum is changed to the current partial angle θ [m]. The subtraction is performed to update the rotation angle θsum, and the process proceeds to step S28.

In step S28, the rotation angle θsum is converted into a parameter value, and it is determined in step S29 whether m> 0. If m> 0, the first partial angle θ

Immediately after [0] is obtained, the parameter value difference diff.num is set to an initial value in step S30, and the process proceeds to step S32. If m> 0, the parameter value difference is diff.num in step S31. Store in num and go to step S32.

In step S32, the parameter increase / decrease data is transferred by diff.num and the parameter value is displayed on the display unit 8. In step S33, n and m are incremented to return to the original routine.

As described above, when the tablet 9 is operated in the parameter setting mode, the parameter value can be increased or decreased according to the operated turning direction.
Further, even if the circle is not accurately drawn, the parameter can be continuously increased / decreased only by intuitively drawing the circle, the operation is not restricted, and the parameter can be freely relaxed and changed. Also, by drawing a small circle, the parameter can be increased or decreased quickly, and by drawing a large circle, the parameter value can be minutely changed.

In the above embodiment, the tone color parameter of the tone generator circuit is changed. However, similarly to this embodiment, the rotation angle of the locus of the operating point on the tablet is detected, and the effect parameter is set according to this rotation angle. Can be increased or decreased. As a result, the effect of musical sound can be controlled by free operation without being limited to the operation position on the tablet.

For example, as shown in FIG. 9, when turning clockwise and counterclockwise with one operation, the effect parameter increases and decreases. As an example of the control effect, when the character "8" and the character "∞" are continuously drawn on the tablet in this way, the parameter repeatedly increases and decreases. Therefore, it is possible to control panning and vibrato. It will be suitable. Also,
Pitch bend and the like may be controlled.

Now, the playing tablet such as the conventional electronic musical instrument is commonly used for setting the tone color parameter and controlling the effect in the present invention. In this case, the performance operation and parameter input operation or effect control operation can be performed with the same tablet, so for example, while playing the keyboard with the left hand while operating the tablet with the right hand to express the sound, with the left hand As a parameter input mode or an effect control mode by pressing the mode changeover switch, the tablet can be smoothly switched to a parameter input operation or an effect control operation without releasing the hand on the performance operation side.

In the above embodiment, the case where the tablet is used as the two-dimensional surface input operation means has been described, but the pointer (cursor) is moved by the mouse or the like with the screen of the CRT or the liquid crystal panel or the like as the operation surface. Other pointing devices, such as ones, can also be used.

[0042]

As described above, according to the present invention, the moving direction of the operation point on the operation surface of the two-dimensional surface input operation means such as a tablet is detected, and the electronic music is detected according to the rotation angle of this operation direction. Since the parameter of the sound source or the parameter for effect in 1 is increased / decreased, the operation can be performed without being limited to the operation position, and the input device with good operability in which the constraint of the input operation is reduced can be obtained. .

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic musical instrument to which an embodiment of the present invention is applied.

FIG. 2 is a diagram illustrating a rotation angle on a tablet in an example.

FIG. 3 is a diagram illustrating the relationship between sampling points and vectors in the example.

FIG. 4 is a diagram illustrating an azimuth coordinate system in the example.

FIG. 5 is a diagram illustrating partial angles in the example.

FIG. 6 is a flowchart of a main routine in the embodiment.

FIG. 7 is a part of a flowchart of tablet event processing in the embodiment.

FIG. 8 is another part of the flowchart of tablet event processing in the embodiment.

FIG. 9 is a diagram showing an operation example on the tablet in the embodiment.

[Explanation of symbols]

 1 ... CPU, 5 ... Sound source circuit, 9 ... Tablet.

Claims (2)

[Claims] 1. A two-dimensional surface input operation means for outputting position information of an operation point on the operation surface, and an operation point for moving on the operation surface based on the position information output from the two-dimensional surface input operation means. A moving direction detecting means for detecting a moving direction of the electronic instrument, and a parameter control means for increasing or decreasing a parameter of a sound source in the electronic musical instrument according to a rotation angle of the operating point in the moving direction on the operating surface. Instrument parameter input device. 2. A two-dimensional surface input operation means for outputting position information of an operation point on the operation surface, and an operation point for moving on the operation surface based on the position information output from the two-dimensional surface input operation means. A moving direction detecting means for detecting a moving direction of the electronic instrument, and a parameter control means for increasing or decreasing an effect parameter in the electronic musical instrument according to a rotation angle of the operating point in the moving direction on the operation surface. Musical instrument performance control device.