JPH0564893U - Pedal tone control device - Google Patents

Abstract

(57) [Summary] [Purpose] The effector volume and program change switch are integrated and robust. A variable resistor 31 whose resistance value changes according to the depression angle of a pedal 30 is converted into digital data VOL by an A / D changer 32 and used for volume control, and a threshold is set for this VOL. Exceeds the threshold, a PEV signal is generated. By changing the program or changing the parameter based on the PEV signal, the program change switch and the volume are integrated, and the structure is simplified to improve the durability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pedal musical tone control device that controls volume and the like according to the amount of depression, and more particularly to a pedal musical tone control device that is also capable of switching control without increasing the number of mechanical parts.

[0002]

[Prior Art]

 Electronic musical instruments such as electronic organs use pedal-based controllers to control volume and vibrato depth. A general pedal controller outputs the pedal depression angle as the resistance value of a variable resistor, and is capable of continuous value control of musical sounds. By the way, playing an electronic organ requires many switching operations, so controllers that allow switching operations with the foot operating the pedal have been put into practical use. For example, in Japanese Utility Model Publication No. 53-21944, a switch is provided on the side surface of the pedal, and the switch can be operated by horizontally swinging the foot operating the pedal.

[0003]

[Problems to be solved by the device]

 By the way, there are times when you want to control the on / off and the magnitude (depth) of the effect (effect) with an electric guitar (electric guitar). In such a case, conventionally, the foot switch and the pedal controller were placed together at the feet for performance. Therefore, there is a drawback that wiring and feet are complicated. In addition, the above-mentioned controller for an electronic organ has a complicated structure and is delicate, and thus has a drawback that it cannot withstand a heavy operation such as when playing an electric guitar.

It is an object of the present invention to provide a pedal tone control device which has a strong and simple structure and is capable of continuous value control and switching control.

[0005]

Means for Solving the Problems The invention of claim 1 of the present application is to output a continuous value data according to a pedaling angle of a pedal, and a switching signal when the continuous value data exceeds a threshold value. And a switching signal output means.

According to a second aspect of the present application, a pedal unit that outputs continuous value data according to a pedal depression angle, and a switching signal that outputs a switching signal when the rate of change of the continuous value data exceeds a threshold value. And output means.

[0007]

[Action]

 The pedal tone control device of the present invention normally outputs continuous value data for controlling volume and the like. In the pedal tone control device of the first aspect, the switching signal is output when the continuous value data exceeds the threshold value. If the threshold value is set outside the range of the data used for the actual performance, the switching signal will not be erroneously output during the performance. When a threshold value is set above the range, a switching signal is output when continuous value data exceeds that threshold value (when the pedal is deeply depressed), and a threshold value is set below the range. , The switching signal is output when the continuous value data falls below the threshold value (when the pedal is released). Further, in the pedal tone control device of the second aspect, the switching signal is output when the rate of change of the continuous value data exceeds the threshold value (when there is a quick pedal operation). In this case, the threshold should be set to a rate of change that is not used for normal performance. The switching signal is used for various controls such as program change.

Since the switching signal output as described above can be performed in a soft manner without complicating the pedal structure, a simple and sturdy pedal structure portion can be used.

[0009]

【Example】

 FIG. 1 is a block diagram of an effect device (effector) for a guitar to which the pedal controller of the present invention is applied. This effect device is a device for A / D converting an input signal to give an effect, and then again D / A converting and outputting. The entire operation of this effect device is controlled by CPU 10. A ROM 12, a RAM 13, an A / D converter 14, an effect applying circuit 15, a panel interface 17 and a pedal interface 19 are connected to the CPU 10 via a bus 11. The ROM 12 stores a program for operation control. The RAM 13 stores the set control data and the like. The A / D converter 14 is a circuit for converting a musical tone signal input from an electric guitar or the like into a digital signal. The effect applying circuit 15 is a circuit for applying effects such as distortion and reverb to the digitally converted musical tone signal as shown in detail in FIG. An operation panel 18 is connected to the panel interface 17, and the operation contents of the switches on the operation panel 18 are detected and the display control of the display is performed. Switches for setting various parameters are provided on the operation panel 18, and specifically, switches for setting the distortion level, the reverb delay time, the depth, and the like are provided. Further, a pedal controller 20 is connected to the pedal interface 19. The pedal controller 20 is a device for externally outputting the pedal depression angle as the resistance value of the volume, as shown in FIG. The pedal is operated by the performer's right foot. The pedal interface 19 outputs a volume signal VOL and a switching control signal PEV based on the operation state of the pedal. VOL is input to the connection effect imparting circuit 15, and P EV is input to the CPU 10 via the bus 11. The digital tone signal to which the effect is applied by the effect applying circuit 15 is converted into an analog signal again by the D / A converter 16 and is output as the tone signal to which the effect is applied. This signal is input to an amplifier and output as sound.

FIG. 2 is a diagram showing a configuration of the effect imparting circuit 15. This circuit adds an acoustic effect to the input digital musical sound signal and outputs it, and can add distortion and reverb effects. The transmission path of the digital tone signal is the distortion circuit 22, the reverb circuit 23, and the bypass 26. These paths are branched by the select switch 21 and joined by the adder 24. The adder 24 is connected to the volume control circuit 25. The select switch 21 inputs the input terminal IN (input digital musical tone signal) to any one or a plurality of paths of the distortion circuit 22, the reverb circuit 23, and the bypass 26 based on the select signal SEL input from the CPU. The distortion circuit 22 imparts a distortion effect to the musical sound based on the head cutting level signal LEVEL set on the operation panel 18. Distortion is an effect of distorting a musical sound by letting a signal up to a certain level LEVEL pass through as it is and suppressing a signal exceeding this level according to the level. Further, the reverb circuit 23 imparts a reverb effect to the music signal based on the reverb time signal TIME and the depth signal DEPTH set by the operation panel 18. Here, reverb is the effect of adding reverberation to a musical sound. The musical tones to which these effects are added and the musical tone signals that have just passed through the bypass 26 are added by the adder 24 and then input to the volume control circuit 25. The volume control circuit 25 controls the volume of the entire tone signal based on the volume control signal VOL input from the pedal interface 19. The digital tone signal output from the volume control circuit 25 is input to the D / A converter 16.

FIG. 3 is a diagram showing the configurations of the pedal controller 20 and the pedal interface 19. A variable resistor 31 is connected to the pedal 30. The variable resistor 31 has one end applied with a predetermined voltage and the other end grounded. The position of the intermediate contact changes according to the pedal depression angle, and the output voltage from the intermediate contact changes according to the pedal depression angle. The variable resistor 31 is connected to the A / D converter 32 of the pedal interface 19. The A / D converter 32 converts the output voltage of the variable resistor 31 into digital data. The converted digital data is output as a VOL to the effect applying circuit 15 and also to the comparison circuit 33. Threshold data is also input to the comparison circuit 33. When the input digital data exceeds the threshold data, the PEV signal is output. This threshold data is set to a value that exceeds the operation range during normal performance. Here, in this embodiment, the pedals are provided with springs 34 and 35 so that the operator can perceptually recognize the operation range during normal performance. The springs 34 and 35 regulate the amount of rotation of the pedal within the operation range during normal performance. When the pedal is depressed more than the amount of rotation regulated by the springs 34 and 35, the spring biasing force acts. This allows the operator to perceptually recognize the operation range during normal performance. This PEV data is input to the CPU 10 via the bus 11. When the PEV data is input, the CPU 10 changes the program such as the effect to be given. Therefore, when using the program change, the performer can quickly change the program by operating the pedal 30 to an area beyond the playing range. It is also possible to set the threshold value to a value lower than the lowest level of the operating range during normal playing. In this case, the program can be changed by quickly returning the pedal 30.

FIG. 4 is a diagram showing another configuration of the pedal interface 19. The pedal controller 20 is the same as that shown in FIG. The variable resistor 31 of the pedal controller 20 is connected to the A / D converter 32 of the pedal interface 19. The variable resistor 31 has a resistance value corresponding to the depression angle of the pedal 30. The A / D converter 32 converts this resistance value into digital data. The converted digital data is output as a VOL to the effect applying circuit 15 and also to the comparison circuit 36. Two pieces of threshold data are input to the comparison circuit 36. The two pieces of threshold data are upper threshold data (High) and lower threshold data (Low), respectively. These threshold data High and Low are set to values outside the operation range during normal performance. When the digital data (VOL) exceeds the upper threshold data (High) (when it exceeds the upper threshold), the PEV / INC signal is output. When the digital data (VOL) falls below the lower threshold data (Low) (when it exceeds the lower threshold), the PEV / DEC signal is output.

Although the PEV / INC signal and the PEV / DEC signal are input to the CPU 10 via the bus 11, they may be directly input to a circuit for controlling a musical sound. FIG. 5 shows an example of a musical tone control circuit to which the PEV / INC signal and the PEV / DEC signal are directly input. This circuit comprises a parameter changing circuit 37, a parameter register 38 and a parameter utilizing circuit 39. The parameter utilization circuit 39 is a circuit for forming a musical tone or imparting an effect to a musical tone by using parameters such as a tone generator circuit and an effect imparting circuit as shown in FIG. The parameter register 38 stores various parameters for this purpose. The parameter changing circuit 37 selects a predetermined parameter based on the parameter select signal PARASE L and inputs it to the parameter register 38.

The parameter select signal PARASEL is generated according to the operation of the selection switch provided on the operation panel 18. The parameters selected are, for example, the select signal SEL, the head cutting level signal LEVEL, the reverb time signal TIME, etc. in FIG. Further, the selected parameter is adjusted based on the PEV / INC signal and PEV / DEC signal input from the comparison circuit 36. That is, when the PEV / INC signal is input, 1 is added to the parameter, and when the PEV / DEC signal is input, 1 is subtracted from the parameter.

FIG. 6 is a diagram showing still another embodiment of the pedal controller 20 and the pedal interface 19. The pedal controller 20 is similar to that of the embodiment shown in FIG.

The variable resistor 31 is connected to a pulse detection circuit 43 via a high pass filter (HPF) 42 and is connected to an A / D converter 45 via a low pass filter (LPF) 44. The pulse detection circuit 43 is a circuit that outputs a PEV signal when the rate of change of the resistance value of the variable resistor 31 is a certain value or more. That is, the PEV signal is output when the operation speed of the pedal 30 is quickly operated over a certain level. The circuit configuration is a combination of a differentiating circuit and a comparing circuit. The digital data output from the A / D converter 45 is output to the effect imparting circuit 15 as a VOL. The LPF 44 is connected in front of the A / D converter 45 because the rapid change in the resistance value occurs when the pedal 30 is quickly operated to output PEV (due to a program change). This is to prevent the VOL from reacting.

In the embodiment of FIG. 6, it is possible to output a positive-direction pulse or a negative-direction pulse depending on whether the pedal is quickly operated in the depressing direction or when the pedal is quickly operated in the returning direction. Is. By outputting such a pulse, it is possible to control the on / off of a certain effect, the progress / return of the program, etc. by the pedal operation direction.

Further, in the above-described embodiment, although the program change of the effect imparted to the musical sound is performed by the output of the pedal and the volume of the musical sound is controlled, the present invention is not limited to this. It is also possible to perform program change of the effect to be applied to and to control the level of effect to be applied to this musical sound.

[0019]

[Effect of the device]

 As described above, according to the present invention, the continuous value control of the volume and the like and the switching control of the program change and the like can be performed with a simple structure, so that the cost can be reduced and a sturdy pedal that can withstand rough operation. A tone control device can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of an effect device in which a pedal control device according to an embodiment of the present invention is used.

FIG. 2 is a diagram showing a configuration of an effect imparting circuit of the same effect device.

FIG. 3 is a diagram showing a pedal controller and a pedal interface of the same effect device.

FIG. 4 is a diagram showing another embodiment of the pedal interface of the same effect device.

FIG. 5 is a diagram showing an example of a musical tone control circuit connected to the pedal interface.

FIG. 6 is a diagram showing still another embodiment of the pedal controller and the pedal interface.

[Explanation of symbols]

19-pedal interface, 20-pedal controller, 31-variable resistor, 33-comparator circuit, 43-pulse detection circuit.

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location G10H 1/14 7406-5H

Claims (2)

[Scope of utility model registration request] 1. A pedal tone comprising: a pedal section for outputting continuous value data according to a pedaling angle of the pedal; and a switching signal output means for outputting a switching signal when the continuous value data exceeds a threshold value. Control device. 2. A pedal unit for outputting continuous value data according to a depression angle of a pedal, and a switching signal output means for outputting a switching signal when a rate of change of the continuous value data exceeds a threshold value. Naru pedal sound control device.