JPS61187408A - Graphic equalizing device - Google Patents

Abstract

PURPOSE:To attain the use of a single section of multisection variable resistor with simple constitution by using a variable capacitor setting tone quality of each band and a variable resistor for data storing the position of the set variable volume for switch changeover in common. CONSTITUTION:Variable resistors VRa-VRc are used as so-called equalizer variable resistors because the sound volume through the variable resistors VRa-VRc is adjusted by band split by coils L1-L3 when switches S1-S3 are turned on to adjust the tone quality outputted from an amplifier A2 to an output terminal OUT. Further, the output level set by the adjusting position of the variable resistors VRa-VRc is converted into a digital signal by an A-D converter 1 when switches S4-S6 are turned on. Data depending on the position of the variable resistors VRa-VRc are stored according to the preference of the user are stored in a RAM 4 and data in response to the source are stored in advance in a ROM 7 to set the variable resistors VRa-VRc as required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention is directed to an improvement of a graphic equalizer device that can automatically set the volume for each preset band.

[Technical Background of the Invention J Generally, a graphic equalizer device is provided with a plurality of volume adjustment volumes for each band in addition to a main polygon, and these volumes are adjusted to set the desired sound quality. However, the graphic equalizer adjusts according to the source being played, but as the band becomes more divided, the number of volumes to be adjusted increases and the frequency of adjustments increases due to the increase in volumes and the diversification of sources. It is coming. For this reason, it was time-consuming to set each volume every time the source changed.

For this reason, in recent years, as shown in Figure 3, the position of the volume set for each band corresponding to the source is stored in memory, read out from memory according to the source, and set to the desired sound quality. There is.

That is, in FIG. 3, the input signal is input to the τ buffer amplifier A1 via the input terminal IN, and is further input to the τ buffer amplifier A1 via the input terminal IN.
, R2 to one input of the amplifier A2. A plurality of volumes VR+ to VRs are connected in parallel between the connection point of the resistors R+ and Rz and the other input of the amplifier A2, and a coil resonates for each predetermined band between the movable pieces of these volumes VR+ to VR3 and the ground. 1 to L3 are interposed and connected. Therefore, by adjusting the volumes vR+ to VR3, any band can be emphasized or suppressed and outputted from the output terminal OUT of the amplifier A2.

By the way, the volumes VR4 to VRb are arranged opposite to the volumes VRI to VR3, respectively, and the volumes VR+ and VR4, VR2 and VRs, and VR3 and VR6, which are opposed to each other, are interlocked. Therefore, output levels similar to those obtained by adjusting the adjustment positions of the volumes VR+ to VR3 are derived to the movers of the volumes VR4 to VR. The output levels set by the adjustment positions of the volumes VR4 to VRs are inputted as levels for each band to the A-D converter 1 of the microcomputer CPU, and are converted from analog signals to digital signals. The output of the A/D converter 1 is stored in the RAM 4 via the input/output port 2 and the dropping point processing section 3. RAM4 as needed
The motor drive circuit 5 is driven from the arithmetic processing section 3 via the input/output board 2 so that the output level is the same as the output level of the volumes VR4 to VRb stored in the memory. This rotates the motor M, and the volume control mechanism 6 adjusts the volume VR+ to V.
By adjusting R3, the data stored in RAM 4 is set to have each opposing output level. By the way, the volumes VR4 to VR6 also move following the volumes VR+ to VR3, respectively, and when the output levels of the volumes VR4 to VR6 match the data stored in the RAM 4, the motor drive circuit 5 is stopped and the data is input to the input terminal IN. Output to output terminal 0LIT of amplifier Az with sound quality suitable for the source. By the way, the position of each volume VR+ to VR2 according to the source is stored in advance in the ROM 7 by the manufacturer.

Then, the user operates an operation button (not shown) as necessary to read data corresponding to the source stored in the ROM 7 and drive the volume control mechanism 6 to set the predetermined volume VR+.
~Adjust to VR3.

Therefore, in RAM4, the user stores the setting data of each volume VR+ to VR3 that the user prefers for the source, and in ROM7
By storing setting data in advance on the manufacturer's side, sound quality settings can be made according to the source without having to adjust each polygon each time.

[Problems with treacherous technology] However, in the graphic equalizer vtW1 configured as shown in Figure 3, there is an equalizer volume that adjusts the sound quality, and data that opposes these and provides the same data to the memory for the position of the volume. It consists of two volumes. This not only complicates the configuration of the volume, but also makes it extremely difficult to make the output levels of corresponding volumes the same.

[Objective of the Invention J The present invention eliminates the above-mentioned problems, and serves as both an equalizer volume that is adjusted for each band and a data volume that stores the output level of the adjusted volume in memory. .

[Invention Il! Key Points: The graphic equalizer of the present invention adjusts the volume for each divided band, sets the volume for each band, stores the set volume state in multiple memories, and adjusts the set volume as necessary. In devices that can automatically set the volume for each band by reading out the status of the volume, switch the volume for each band and the volume to be set in order to store the setting status of this volume in the memory under the same conditions. It is also used by

[Embodiments of the Invention] An embodiment of the present invention will be described in detail below with reference to FIG. 1 and FIG. 2.

That is, the input signal input to the input terminal IN is input from the input terminal IN to the buffer amplifier A1, and is applied from the output of the amplifier A1 to one input of the amplifier A2 through resistors R1 and R2.

A plurality of equalizers and data volumes VRa to VRc are connected between the resistors R1 and R2 and between the other input of the amplifier A2.
are connected in parallel. These volumes VRa to VRc
Each of the movers is connected to the ground via switches 81 to 83 and tuning coils L1 to L3. Further, the signals are input from each movable element of the volume VRa to VRc to the A-D converter 1 of the microcomputer CPU via switches $4 to S6, respectively.

Here, the volumes VRa-VRc are coiled when the switches 81 to $3 are on, and the volume of each volume VR-a to VRc is adjusted by band division by 1 to L3, and the sound quality is output from the amplifier A2 to the output terminal OUT. can be adjusted, and can be used as a so-called equal volume. Also, the volume VRa-VRc is set by switch 84~
When S6 is on, each volume VRa-VRC
The output level set by the adjustment position is converted into a digital signal by the A-D converter 1. The data converted into digital signals by the A/D converter 1 is stored in the RAM 4 via the input/output board 2 and the arithmetic processing section 3. The data stored here is read out from the ROM 4 by operating operation keys (not shown) on the operation unit as necessary, and the switches S to Ss are turned on from the input/output board 2, and the motor drive circuit 5 to rotate the motor M. Therefore, the volume allIO mechanism 6 is controlled so that the output level of each volume VRa to VRc becomes an output level corresponding to the data stored in the RAM 4. Volume V Ra ~ VRC output level is A-
When the data input from the D converter 1 and the input/output board 2 via the arithmetic processing unit 3 match the data read from the RAM 4, the drive of the motor drive circuit 5 is stopped. At the same time, the input/output boat 2 turns off the switches 84 to Ss and turns on the switches 81 to S3. As a result, amplifier A
2. The sound quality is output to the output terminal OUT according to the settings of the volumes VRa-VRc based on the data read from the ROM 4.

Note that each volume V based on the source stored in RAM4
A plurality of Ra-VRc setting positions are possible depending on the storage capacity.

In addition, the manufacturer stores in advance in the ROM7 a plurality of data for setting the output level of each volume VRa~VRC based on the source, and the user operates the operation keys on the operation unit as necessary to set the output level of each volume VRa~VRC based on the source. It can be controlled to a position suitable for At this time as well, the data stored in the RAM 4 is read out and the volume control mechanism 6 is driven based on the data stored in the ROM 7 in the same way as when the volume control mechanism 6 controlled each volume vRa-VRC.
Set VRc. Therefore, the volume V that matches the source
After adjusting Ra to VRc, turn switches 84 to S from on to off, and turn on switches 81 to S3 to read the ROM.
Adjusted volume VRa to VRc based on the data of 7.
The sound quality is output from amplifier A2.

In this way, data at the positions of each volume VRa to VRC can be stored in the RAM 4 according to the user's preference, or
Data corresponding to the source is stored in advance using the OM7, and the volume (Ra-VRC) can be set as necessary.

[Effects of the Invention] As described above, the graphic equalizer device of the present invention has the advantage that the volume for setting the sound quality of each band and the volume for data for storing the position of the set volume can be combined by changing the switch. Not only can a single volume with a simple volume configuration be used, but space can also be saved even when the volume is increased by increasing the number of band divisions.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention, FIG. 2 is a flowchart according to FIG. 1, and FIG. 3 is a conventional circuit configuration diagram. VRa-VRc...Volume 81-S3...Switch S, ~S6...Switch 1-3...Coil CPU...Microcontroller... A-DI duster 2...
...... Input/output circuit 3 ...... Arithmetic processing section 4 ...... RAM 5 ......・・Motor drive circuit M・・・・
・・・・・・・・・Motor 6・・・・・・・・・Volume tIII Main Cuff・・・・・・・・・ROM 11!1 Fig. 2

Claims (1)

[Claims] Adjust the volume for each divided band to set the volume for each band, store the set volume state in multiple memories, read out the set volume state as necessary, and set the volume for each band. The graphic equalizer device is characterized in that the volume for each band and the volume set for storing the setting state of this volume in the memory under the same conditions can be used together by switching. Graphic equalizer device.