JP2603230Y2 - Pedal tone control device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pedal tone control apparatus for controlling a volume and the like in accordance with the amount of depression, and more particularly to a pedal tone control apparatus capable of switching control without increasing the number of mechanisms.

[0002]

2. Description of the Related Art In an electronic musical instrument such as an electronic organ, a controller using a pedal is used to control a volume, a vibrato depth, and the like. A general pedal controller outputs a pedal depression angle as a resistance value of a variable resistor, and can control a continuous tone value. By the way, since the performance of the electronic organ requires many switching operations, a controller that can perform the switching operation with a foot that operates a pedal has been put to practical use. For example, in Japanese Utility Model Publication No. 53-21944, a switch is provided on the side of the pedal, and this switch can be operated by swinging the foot for operating the pedal sideways.

[0003]

[Problem to be solved by the invention] By the way, even with an electric guitar (electric guitar), the effect (effect) is turned on / off.
There are cases where it is desired to control the off and its size (depth) with a pedal. In such a case, conventionally, a foot switch and a pedal controller have been put together at the feet to perform. For this reason, there was a drawback that wiring and feet became complicated.
Further, the above-mentioned controller for an electronic organ has a drawback that it cannot withstand an intense operation such as when playing an electric guitar because the structure is complicated and delicate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pedal tone control device which has a strong and simple structure and can perform continuous value control and switching control.

[0005]

[0006]

According to the present invention, there is provided a pedal unit for outputting continuous value data in accordance with a pedal depression angle;
At the time of or stepping back stepping on the pedal, the said continuous value data change rate exceeds the threshold, e Preparations and switching signal output means for outputting a switching signal, the contents of the switching signal, Bae
The difference between when you step on Daru and when you step back
Features .

The pedal tone control device of the present invention normally outputs continuous value data for controlling the volume and the like, and when the rate of change of the continuous value data exceeds a threshold value when the pedal is depressed or depressed. (To the stepping direction
Alternatively , if a quick pedal operation is performed in the step-back direction, a switching signal having a different signal content is output according to the operation direction of the pedal . The threshold in this case is a change that is not used for normal performance
Set to speed. For example , the pedal depresses quickly
And when, when it was depressed returned quickly, respectively, contact so as to output a positive pulse and negative pulse
By doing this , you can turn on / off certain effects,
The return can be controlled by the operation direction of the pedal.
The switching signal is used for various controls such as a program change.

Since the output of the switching signal as described above can be performed by software without complicating the structure of the pedal, a simple and robust pedal structure can be used.

[0009]

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 that A / D converts an input signal to give an effect, and then performs D / A conversion again and outputs the result. The overall operation of this effect device is controlled by the CPU 10. The CPU 10 has a ROM 1 via a bus 11.
2, RAM 13, A / D converter 14, effect imparting circuit 1
5, a panel interface 17 and a pedal interface 19 are connected. The ROM 12 stores an operation control program. The RAM 13 stores the set control data and the like. The A / D converter 14 is a circuit that converts a tone signal input from an electric guitar or the like into a digital signal. The effect imparting circuit 15 is a circuit for imparting effects such as distortion and reverb to a digitally converted musical tone signal as shown in detail in FIG. An operation panel 18 is connected to the panel interface 17, and detects operation contents of switches on the operation panel 18 and controls display on a display. On the operation panel 18, switches for setting various parameters are provided. Specifically, switches for setting a distortion level, a reverb delay time, a depth, and the like are provided. A pedal controller 20 is connected to the pedal interface 19. The pedal controller 20 is a device for externally outputting the depression angle of the pedal as a resistance value of a volume as shown in FIG. The pedal is operated by the player'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,
The PEV is input to the CPU 10 via the bus 11. The digital tone signal to which the effect has been added by the effect imparting circuit 15 is converted into an analog signal again by the D / A converter 16 and output as a tone signal to which the effect has been added. This signal is input to an amplifier or the like and output as sound.

FIG. 2 is a diagram showing a configuration of the effect applying circuit 15. As shown in FIG. This circuit adds an acoustic effect to an input digital musical tone signal and outputs the signal, and can impart distortion and reverb effects.
The transmission path of the digital tone signal is a distortion circuit 22, a reverb circuit 23, and a bypass 26. These paths branch at the select switch 21 and join at the adder 24. The adder 24 is connected to a volume control circuit 25. The select switch 21 applies an input terminal IN (input digital tone signal) to the distortion circuit 2 based on a select signal SEL input from the CPU.
2, input to one or more paths of the reverb circuit 23 and the bypass 26. The distortion circuit 22 is provided with a start level signal LEVEL set on the operation panel 18.
, A distortion effect is given to the musical sound.
Distortion is an effect of distorting a musical sound by passing a signal up to a certain level LEVEL as it is and suppressing a signal exceeding this level according to the level. Further, the reverb circuit 23 outputs the reverb time signal TIME and the depth signal D set on the operation panel 18.
A reverb effect is applied to a tone signal based on EPTH. Here, reverb is an effect of adding reverberation to a musical sound. The tone to which these effects have been added and the tone signal that has passed through the bypass 26 as they are 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 configuration of the pedal controller 20 and the pedal interface 19. Pedal 3
To 0, a variable resistor 31 is connected. Variable resistor 3
1 has a predetermined voltage applied to one end, and the other end is grounded. Further, 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 an A / D converter 32 of the pedal interface 19.
It is connected to the. The A / D converter 32 is a variable resistor 31
Is converted to digital data. The converted digital data is output to the effect imparting circuit 15 as a VOL and is also input to the comparison circuit 33. The threshold data is also input to the comparison circuit 33. When the input digital data exceeds this threshold data, PE
A V signal is output. The threshold data is set to a value exceeding the operation range during normal performance. Here, the operator of the operation range when playing normal is so can recognize sensuously provided the spring 34 and 35 to the pedal. This spring 34,
35 regulates the rotation amount of the pedal to the operation range during normal performance. When the pedal is depressed beyond the amount of rotation regulated by the springs 34 and 35, the biasing force of the spring acts. Thus, the operator can intuitively 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 a program such as an effect to be applied. Therefore, when using the program change, the player can change the program by quickly operating the pedal 30 to an area beyond the performance range. In addition, the threshold value can be set to a value lower than the lowest level of the operation range during normal performance. In this case, if the pedal 30 is quickly returned, a program change can be performed.

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 is the pedal 30
Take the resistance value corresponding to the stepping angle of. A / D converter 32
Converts this resistance value into digital data. The converted digital data is output to the effect imparting circuit 15 as a VOL and is also input to the comparison circuit 36. Two threshold data are input to the comparison circuit 36. The two threshold data are upper threshold data (High),
This is lower threshold data (Low). 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 the digital data (VOL) exceeds the upper threshold), a PEV / INC signal is output. When the digital data (VOL) is lower than the lower threshold data (Low) (when the digital data (VOL) is lower), a PEV / DEC signal is output.

The PEV / INC signal and the PEV / DEC signal are input to the CPU 10 via the bus 11, but they may be input directly to a circuit for controlling musical sounds. PEV
FIG. 5 shows an example of a tone control circuit to which the / INC signal and the PEV / DEC signal are directly input. This circuit includes a parameter changing circuit 37, a parameter register 38, and a parameter using circuit 39. Parameter utilization circuit 39
Is a circuit for forming a musical tone or applying an effect to a musical tone using parameters of a tone generator circuit and an effect imparting circuit as shown in FIG. Various parameters for this purpose are stored in the parameter register 38. Parameter change circuit 37
Selects a predetermined parameter based on the parameter select signal PARASEEL and inputs it to the parameter register 38.

The parameter select signal PARASE is generated in response to the operation of a selection switch provided on the operation panel 18. The parameters to be selected are, for example, the select signal SEL, the start level signal LEVEL, the reverb time signal TIME, and the like in FIG. Further, the selected parameter is adjusted based on the PEV / INC signal and the 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 the PEV / DEC signal is added.
When the C signal is input, 1 is subtracted from the parameter.

FIG. 6 is a diagram showing a configuration of the pedal controller 20 and the pedal interface 19 corresponding to the embodiment of the present invention . The pedal controller 20 is the same as in FIG.

The variable resistor 31 is a high-pass filter (HP)
F) through a low-pass filter (LPF) 44 and A / D
It is connected to a converter 45. When the rate of change of the resistance value of the variable resistor 31 is equal to or greater than a certain value, the pulse detection circuit 43
This is a circuit that outputs a V signal. That is, the PEV signal is output when the operation speed of the pedal 30 is quickly operated over a certain speed. 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 applying circuit 15 as a VOL. The A / D converter 45
The LPF 44 is connected to the front stage of the pedal 3 in order to output the PEV (for program change).
This is to prevent the VOL from reacting to a sudden change in the resistance value when 0 is quickly operated.

In the embodiment of FIG. 6, the pulse detection circuit 43
Because it contains a differentiating circuit, and if the pedal is quickly operated in the direction of depression, in a case where it is quickly operated to return direction, it is possible to output a positive pulse and a negative going pulse. Therefore, using these two types of pulses
The on / off of a certain effect and the progress / return of a program are controlled by the operation direction of the pedal .

Further, in the above-described embodiment, the effect of giving a program to the musical tone is changed by the output of the pedal, and the volume of the musical tone is controlled.
The present invention is not limited to this. For example, a program change of an effect to be applied to a musical tone may be performed by an output of a pedal, and the level of the effect to be applied to the musical tone may be controlled.

[0019]

As described above, according to the present invention, continuous value control of a volume and the like and switching control of a program change and the like can be performed with a simple configuration, so that cost can be reduced and rough operation can be performed. It is possible to realize a sturdy pedal musical sound control device that can withstand. Also, continuous value data
Data exceeds the threshold when stepping on or returning
(The quick pedal in the depressed or depressed direction
Different depending on the direction of pedal operation)
Switching signals, such as turning on / off certain effects or programming
It can output a signal to switch the progress / return of the system.
You can turn on certain features and then turn them off
Operations frequently required for performance, such as returning to
It has the effect that the work can be done easily.

[Brief description of the 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 effect device.

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

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

FIG. 5 is a diagram showing an example of a 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-comparison circuit, 43-pulse detection circuit.

Claims (1)

(57) [Scope of request for utility model registration] And 1. A pedal unit for outputting a continuous value data corresponding to the depression angle of the pedal, at the time of or stepping back depression of the pedal, the continuous value data of the changing rate Exceeding the threshold value, outputs a switching signal e Bei switching and signal output means, the contents of the switching signal, depression return at the time of depression of the pedal
A pedal tone control device characterized by being different from time to time .