JPH0311934Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a graphic equalizer.

(B) Prior Art Conventionally, graphic equalizers have been known that divide an input signal into multiple frequency bands and adjust the input signal to a desired frequency characteristic by amplifying or attenuating the input signal for each frequency. be.

However, in the past, since the user made the adjustment based on his/her own hearing,
There were problems in that the adjustment work was complicated and it was difficult to obtain appropriate characteristics.

As a solution to this problem,
Those disclosed in Publication No. 2034 and Japanese Utility Model Application Publication No. 54-124459 are known. That is, Japanese Utility Model Publication No. 48-2034 discloses a sound quality correction device having a curved line on the upper edge of the shape that matches the frequency characteristics of the room, the frequency characteristics of the amplifier, speaker, and cartridge of the audio equipment, and the frequency characteristics of the musical instrument to be played. A technique has been disclosed that simplifies the adjustment work by moving the slider of the volume adjustment device for each frequency component to the optimum position at once.

However, in such a device, it is necessary to provide the above-mentioned sound quality correction device for each characteristic, which not only increases cost but also requires time and effort to replace the above-mentioned sound quality correction device.

Furthermore, in Japanese Utility Model Application Publication No. 54-124459, multiple types of display symbols are provided near the operation lever of the display panel, and by matching the position of the operation lever with the same type of display symbol, the band division frequency A regulator is disclosed which is designed to obtain the optimum characteristics for the situation in which the regulator is placed.

However, in such a device, multiple types of display symbols are provided on the display panel, so if too many display symbols are provided, there is a risk that adjustment will be complicated and the appearance will be impaired. .

Furthermore, if the number of display symbols provided on the display panel is reduced in order to avoid the above problem, it will be necessary to prepare multiple display panels, leading to an increase in cost and the problem of requiring time and effort to replace them. do.

(c) Purpose of the invention In view of the above-mentioned problems, the present invention aims to provide a graphical equalizer that can eliminate the increase in cost and the complexity of adjustment work, and can display optimal frequency characteristics depending on the type of input signal. purpose.

(d) Structure of the invention In order to achieve the above purpose, the input signal is divided into multiple frequency bands and the input signal is adjusted to the desired frequency characteristics by amplifying or attenuating the input signal for each frequency. In the graphic equalizer, each of which is composed of a plurality of light emitting elements and provided corresponding to each frequency band, a storage means for storing optimal frequency characteristic data according to the type of input signal, and an input The control means reads the optimum frequency characteristic data stored in the storage means in accordance with the selection of a signal, and displays the frequency characteristic on the display means.

(E) Embodiment FIGS. 1 to 3 are diagrams showing an embodiment of the present invention.

In the figure, 1 is the graphic equalizer body, 2 is the power switch, 3 is the operation switch group,
For example, when the input signal is JAZZ, the operating switch 3a is operated. 4 to 10 are divided frequencies (e.g. 60Hz, 250Hz, 500Hz, 1KHz, 5KHz,
11a _-1 to 11a- ₁₁ , ...11g _-1 to 11g _-11
is the display means 1 provided near the operation knobs 4 to 10.
1, a plurality of light emitting diodes.

In such a device, if the input signal is JAZZ with the power switch 2 turned ON, when the operation switch 3a is turned ON, the operation switch 3a
In response to the ON of , the signal generating circuit 12 constituting the control means 16 generates a signal corresponding to the operation of the operation switch 3a.

When such a signal is input to the address designation circuit 13, an address signal corresponding to the operation switch 3a is outputted from the address designation circuit 13,
The memory contents stored in a predetermined location of the ROM 14 are read out. The contents read out from the ROM 14 in this manner are applied to the display drive circuit 15, and the output of the display drive circuit 15 is used to display the light emitting diodes 11a _-1 to 11a _-11 , . . . 11g _-1 to 11g that constitute the display means 11. _-11
Controls the lighting of.

For example, if a light emitting diode lights up as shown in Figure 2 (assume that the shaded light emitting diode is lit), move the operating knob to the side of the light emitting diode that is lit. By moving it, it is possible to obtain the optimum frequency characteristic for this input signal. Further, when the input signal is changed, it is only necessary to operate one of the operating switches 3b, 3c, and 3d directly, or after operating the operating switch 3e.

By the way, in FIG. 2, the light emitting diodes 11a _-7 ,
11b _-5 , 11c _-3 , 11d _-1 , 11e _-3 , 11f _-5 ,
I explained the case of lighting 11g _-7 ,
Light emitting diodes 11a _-7 to 11a _-11 , 11b _-5 to 1
1b _-11 , 11c _-3 ~ 11c _-11 , 11d _-1 ~ 11d _-11 ,
11e _-3 ~ 11e _-11 , 11f _-5 ~ 11f _-11 , 11g _-7
~11g _-11 may be turned on. In this case, the contents stored in the ROM 14 may be D-A converted for each frequency, and the resulting voltage may be used to light a light emitting diode, or an analog memory may be used to store the voltage for each frequency.
Further, in the embodiment, a case has been shown in which the operation switch group 3 corresponds to a music source, but it may be made to correspond to characteristics of an amplifier, characteristics of a cartridge/speaker, etc.

(f) Effects of the invention According to the invention, the input signal is divided into multiple frequency bands, and the input signal is adjusted to a desired frequency characteristic by amplifying or attenuating the input signal for each frequency. In a graphic equalizer, a display means each composed of a plurality of light emitting elements and provided corresponding to each frequency band, a storage means for storing optimum frequency characteristic data according to the type of input signal, and a display means for storing optimum frequency characteristic data according to the type of input signal, The control means reads the optimum frequency characteristic data stored in the storage means according to the selection and displays the frequency characteristic on the display means, so that the optimum frequency characteristic data according to the input signal can be displayed on a single display means. It is possible to display a plurality of frequency characteristics, and it is possible to reduce costs and the time and effort required to replace display panels, etc., which conventionally occur.

Furthermore, since the display means is composed of a plurality of light emitting elements, the optimal frequency characteristics can be displayed even in a dark place.

[Brief explanation of the drawing]

FIG. 1 is an external front view showing an embodiment of the present invention;
FIG. 2 is an external front view showing its usage state, and FIG. 3 is a diagram showing an example of the block circuit according to the present invention. 1...Graphic equalizer body, 4-1
0...operation knob, 11...display means, 16...control means.

Claims (1)

[Scope of utility model registration request] In a graphic equalizer that divides an input signal into multiple frequency bands and adjusts the input signal to a desired frequency characteristic by amplifying or attenuating the input signal for each frequency, each frequency band uses a plurality of light emitting elements. display means provided corresponding to each frequency band; storage means for storing optimal frequency characteristic data according to the type of input signal; and optimal frequency characteristic data stored in the storage means according to the selection of the input signal. A graphic equalizer comprising: control means for reading frequency characteristic data and displaying the frequency characteristic on the display means.