JPH0243361B2 - - Google Patents

Description

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

[Technical Background of the Invention] In general, a graphic equalizer device is provided with a plurality of volumes for volume adjustment in addition to a main volume for each band, and these volumes are adjusted to set a 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 adjustment increases due to the increase in volumes and the diversification of sources. It's 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, there are devices that store the volume position of each band set corresponding to the source in memory, read it out from memory according to the source, and set it to the desired sound quality. .

That is, in FIG. 3, an input signal is input to buffer amplifier _A1 via input terminal IN, and is further applied to one input of amplifier _A2 via resistors _R1 and _R2 . Connection point of resistors R ₁ and R ₂ and amplifier
Between the other inputs of A ₂ are multiple volumes VR ₁ ~
Connect VR ₃ in parallel and set these volumes VR ₁ to _{VR 3}
Coils L ₁ to _{L 3} that resonate in each predetermined band are inserted and connected between the movable piece and the ground. Therefore, by adjusting the volumes VR ₁ to VR ₃ , any band can be emphasized or suppressed and the output terminal of amplifier A ₂ can be adjusted.
Can be output from OUT.

By the way, the volumes VR ₄ to VR ₆ are arranged opposite to the above-mentioned volumes VR ₁ to VR ₃ , respectively, and the volumes VR ₁ and VR ₄ , VR ₂ and VR ₅ , VR ₃ and
VR ₆ works together. Therefore, output levels similar to those obtained by adjusting the positions of the volumes VR ₁ to VR ₃ are derived to the movers of the volumes VR ₄ to _{VR 6} . The output level set by the adjustment position of the volume VR ₄ to VR ₆ is output to the A-D converter 1 of the microcomputer CPU as a level for each band.
The analog signal is input into a digital signal and converted into a digital signal. The output of the A/D converter 1 is stored in the RAM 4 via the input/output port 2 and the arithmetic processing section 3. If necessary, the motor drive circuit 5 is driven from the arithmetic processing unit 3 via the input/output port 2 so as to have the same output level as the volumes VR ₄ to _{VR 6} stored in the RAM 4. This rotates the motor M, and the volume control mechanism 6 sets the volume VR _1.
~Adjust VR ₃ and set the data stored in RAM 4 so that each output level is the opposite one. By the way, the volume VR ₄ ~ VR ₆ is also the volume VR ₁
~Moves following VR ₃ , volume VR ₄ ~
When the output level of the VR ₆ matches the data stored in the RAM 4, the motor drive circuit 5 is stopped, and the output is output to the output terminal OUT of the amplifier A ₂ with a sound quality suitable for the source input to the input terminal IN. by the way
The position of each volume VR ₁ to _{VR 2} 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, drives the volume control mechanism 6, and adjusts the volume to a predetermined volume _VR1 to _VR3 .

Therefore, in RAM4, the user stores setting data for each volume VR ₁ to _VR3 that the user prefers for the source, and in ROM7, the manufacturer side stores setting data in advance, so that the sound quality can be adjusted according to the source. Settings can be made without having to adjust each volume each time.

[Problems with the Background Art] However, in the case of the graphic equalizer device configured as shown in FIG. 3, there is an equalizer volume for adjusting the sound quality and data for providing the position of the volume to the memory as the same data. It consists of two volumes. This not only makes the volume configuration complicated, but also
It is extremely difficult to make the output levels of corresponding volumes the same.

[Objective of the Invention] 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. .

[Summary of the Invention] The graphic equalizer device of the present invention adjusts the volume for each divided band to set the volume for each band, stores the set volume state in multiple memories, and adjusts the volume for each divided band. In a device that can automatically set the volume for each band by reading the set volume state, the volume that is set in order to store the volume for each band and the setting state of this volume under the same conditions in the memory. It can also be used as both by switching.

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

In other words, the input signal input to the input terminal IN is input to the buffer amplifier _A1 from the input terminal IN,
The output of this amplifier A ₁ is applied to one input of amplifier A ₂ through resistors R ₁ and R ₂ . Resistance R ₁ ,
Between R ₂ and the other input of amplifier A ₂ are multiple equalizer and data volumes VRa to VRc.
are connected in parallel. These volumes VRa~
Switches S ₁ to _{S 3} from each of the movers of VRc,
Furthermore, it is connected to ground via tuning coils L ₁ to _{L 3} . Further, the signals are input from each movable element of the volumes VRa to VRc to the A-D converter 1 of the microcomputer CPU via switches _S4 to _S6 , respectively.

Here, the volumes VRa to VRc are switches S ₁ to _{S 3}
When is on, it is possible to adjust the volume of each volume VRa to VRc by band division using coils L ₁ to _{L 3} to adjust the volume output from amplifier A ₂ to the output terminal OUT, and it is used as a so-called equalizer volume. Can be used. Also the volume VRa
-VRc is converted into a digital signal by the AD converter 1 at an output level set by the adjustment position of each volume VRa to VRc when the switches _S4 to _S6 are on. The data converted into a digital signal by the A-D converter 1 is stored in the RAM 4 via the input/output port 2 and the arithmetic processing section 3. The data stored here is read out from the ROM 4 by operating operation keys on the operation unit (not shown) as needed, turning on switches S ₄ to _{S 5} from the input/output port 2, and transmitting the data to the motor drive circuit. 5
to rotate the motor M. Therefore, the volume control mechanism 6 is controlled so that the output level of each of the volumes VRa to VRc becomes an output level corresponding to the data stored in the RAM 4. The output level of volumes VRa to VRc is A-D converter 1,
When the data input from the input/output port 2 via the arithmetic processing unit 3 and the data read from the RAM 4 match, the drive of the motor drive circuit 5 is stopped. Along with this, input/output port 2 is switch S ₄ ~
Turn off _S6 and turn on switches _S1 to _S3 . As a result, the sound quality is output to the output terminal OUT according to the settings of the volumes VRa to VRc based on the data in the ROM ₄ read from the amplifier A2.

Note that the number of setting positions for each of the volumes VRa to VRc based on the source stored in the RAM 4 can be multiple depending on the storage capacity.

In addition, the manufacturer stores in advance in ROM 7 a plurality of data for setting the output level of each volume VRa to 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 to VRc based on the source. It can be controlled to a suitable position. At this time too
The volume control mechanism 6 reads the data stored in the RAM 4 and drives the volume control mechanism 6 based on the data stored in the ROM 7 in the same way as when it controlled each volume VRa to VRc.
Set VRc. Therefore, after adjusting the volumes VRa to VRc that match the source, switch _S4 to
Turn S ₆ from on to off, and turn on switches S ₁ to _{S 3} .
Adjusted volume based on ROM7 data
Output from amplifier A ₂ with sound quality determined by VRa to VRc.

In this way, data at the positions of each volume VRa to VRc is stored in RAM 4 according to the user's preference.
Alternatively, data corresponding to the source can be stored in advance in ROM7, and the volume VRa can be adjusted as needed.
~VRc can be set.

[Effects of the Invention] As described above, the graphic equalizer device of the present invention serves both as a volume for setting the sound quality of each band and as a data volume for storing the position of the set volume by switching the switch. This not only allows the use of a single volume with a simple volume configuration, but also allows for space savings even when the volume is increased by increasing the division of the band.

[Brief explanation of drawings]

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 to VRc...Volume, S ₁ to S ₃ ...Switch,
S ₄ - S ₆ ... Switch, L ₁ - L ₃ ... Coil, CPU ... Microcomputer, 1 ... A-D converter, 2 ... Input/output circuit, 3
...Arithmetic processing unit, 4...RAM, 5...Motor drive circuit, M...Motor, 6...Volume control mechanism, 7...
ROM.

Claims (1)

[Claims] 1 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. A graphical equalizer device in which the volume can be automatically set is characterized in that the volume for each band and the volume set to store the setting state of this volume in the memory under the same conditions are shared by switching. Graphic equalizer device.