JPH02279010A - Level display device for audio volume position - Google Patents

Abstract

PURPOSE:To use one level display device in two ways by displaying a level of a volume position of an electronic volume controller at UP/DOWN operation of a switch onto a level display device. CONSTITUTION:A switching state detection circuit 6 detects the operation corresponding to the UP/DOWN operation of a switch 5 to input a switching signal to a selector 3 and the level of the volume position signal from an electronic volume controller 4 is displayed on a level display device 2. On the other hand, after the end of operation after a prescribed time elapses, the selector 3 is changed over to display the level of an audio signal onto a level display device 2. Thus, one level display device 2 is in use to attain 2 ways of display and rough sound volume is able to recognized and astonishment at the time of sudden sound emission is not caused.

Description

[Detailed Description of the Invention] [Summary] Regarding a level display device that displays the level of an audio signal or a volume position signal, when the position of the electronic volume is operated, the position of the electronic volume is displayed on an indicator, and after a predetermined period of time has elapsed, the level display device displays the level of an audio signal or a volume position signal. The purpose is to display the level of the audio signal by switching the indicator, and to display the position of the electronic volume and the size of the audio signal on one indicator as necessary, and to display the level of the audio signal or volume position signal. a level display device; a selector for inputting either an audio signal or a volume position signal into the level display device; and a switch state detection circuit that inputs a switching signal to the selector until a predetermined period of time elapses after the UP/DOWN operation for the electronic volume is completed. The level of the audio signal is displayed on the level display device, and the level of the audio signal is displayed at other times.

[Industrial application field]

The present invention relates to a level display device that displays the level of an audio signal or a volume position signal. In recent years, in the hobby market, as personal computers have become more AV-oriented, volume adjustment is also being replaced by mechanical volume control, which is compact, has no mechanical parts, is robust, and does not deteriorate. It is unclear which volume position the device is at when the volume is not output, and it is desired to display this in an easy-to-understand manner.

[Prior Art and Problems to be Solved by the Invention] Conventionally, audio devices such as radio-cassette players display either the size of an audio signal using an indicator or the volume position of an electronic volume using an indicator. I try to do it. If you want to display the size of the audio signal with an indicator,
When no sound is being output, it becomes unclear which position the electronic volume is at, and when an audio signal is suddenly sent out from a computer, etc., a very loud sound is emitted. There was a problem that the size of the object was not known. Furthermore, when the position of the electronic volume is displayed on the indicator, there is a problem in that it is unclear how loud the sound will actually be.

The present invention displays the position of the electronic volume on an indicator when the position of the electronic volume is operated, and after a predetermined time has passed, switches the indicator to display the size of the audio signal. The purpose is to display the following information on one indicator as necessary.

[Means to solve problems]

Means for solving the problem will be explained with reference to FIG.

In FIG. 1, a level display device 2 is an indicator that displays the level of an audio signal or a volume position signal.

The selector 3 selects either the audio signal or the polyneem position signal and displays the level display device 2.
This is what you input.

The switch state detection circuit 6 inputs a switching signal to the selector 3 from the time of the UP/DOWN operation on the electronic volume 4 until a predetermined time has elapsed after the operation is completed.

[Effect]

As shown in FIG. 1, the present invention includes a level display device 2 that displays the level of an audio signal or a volume position signal, and a level display device 2 that selects either the audio signal or the polyneum position signal and inputs it to the level display device 2. U for selector 3 and electronic volume 4
A switch state detection circuit 6 is provided that inputs a switching signal to the selector 3 from the P/'DOWN operation until a predetermined time has elapsed after the P/'DOWN operation is completed.
In response to the P/DOWN operation, the switch state detection circuit 6 detects the operation, inputs a switching signal to the selector 3, displays the level of the volume position signal from the electronic volume 4 on the level display device 2, and after the operation is completed. After a predetermined time has elapsed, the selector 3 is switched to display the level of the audio signal on the level display device 2.

Therefore, by displaying the level of the volume position of the electronic volume 4 on the level display device 2 when the switch 5 is operated UP/DOWN, it is possible to know the approximate volume of the sound even when there is no sound, and it is possible to hear more than expected. You won't be surprised when something suddenly appears. In addition, the level display device 2 displays the level of the audio signal at other times.
This allows you to adjust the volume to the optimum level.

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be explained in detail using FIGS. 1 and 2.

In FIG. 1, the level display ICI displays the level of the signal by causing a corresponding LED to emit light in accordance with the level of the input signal.

The level display device 2 displays the level of a signal, and for example, a plurality of LEDs are arranged in a straight line and emit light to display the level of the signal.

The selector 3 is for selecting either an audio signal or a volume position signal.

Electronic volume 4, input push signal, UP/DO
Corresponding to the WN signal, for example, while the push signal is being sent, the oscillated clock is counted (added/subtracted) in response to the UP/DOWN signal, and the amplifier gain (or the resistance value for adjusting the amplifier gain) is calculated. It increases/decreases.

Switch 5 increases/decreases the gain of the electronic volume.
This is a switch that is operated to turn the power on.

The switch state detection circuit 6 is a circuit that detects a state in which either the UP/DOWN switch 5 is pressed.

Next, the operation will be explained.

In FIG. 1, when either the UP/DOWN switch 5 is pressed, the switch-like a detection circuit 6 detects this pressing, inputs a switch signal to the electronic volume 4, and inputs that fact to the selector 3. . Correspondingly, the selector 3 changes the volume level H from the electronic volume 4.
No. 8 is input to the level display ICI, and the level corresponding to the volume position signal is displayed on the level display device z. Then, after a while after the switch 5 is stopped being pressed, the switching signal is turned OFF, and the audio signal (
(for recording, etc.) is displayed on the level display device 2.

Through the above operations, the level of the volume position signal sent from the electronic volume 4 is displayed on the level display device 2 for a while after the switch 5 is pressed and the electronic volume 4 is operated. death,
By displaying the level of the audio signal at other times, it is possible to display two displays using one level display device 2, and even when no sound is being produced, the level of the electronic volume 4 can be adjusted by pressing the switch 5. to display,
This makes it possible to know the approximate volume level, so you won't be surprised by sudden loud noises.

Next, a specific circuit example of the present invention will be explained using FIG.

In FIG. 2, the switch state detection circuit 6 detects the state in which the switch 5 is pressed, inputs a switching signal to the analog switch 3-1, and transmits the volume position signal from the electronic volume 4 to the audio level display TCT. This is what you have to input. This is performed by a switch status circuit 6-1 that detects whether the UP switch or the DOWN switch constituting the switch 5 is pressed, a comparator 62 that compares signals oscillated in response to the depression, and this comparator 6-2. It is comprised of a smoothing circuit 6-3, etc., which smoothes the compared signals and inputs a switching signal to the analog switch 3-1.

Electronic volume 4, switch status detection port! Generates an oscillation signal in response to the push signal input from 36;
This oscillation signal is counted (added/subtracted 3E) in response to the input UP/DOWN signal to adjust the gain (or adjust the resistance value for gain adjustment of the electronic volume 4), and The volume position signal of the electronic volume 4 is input to one input terminal of the analog switch 3-1.
Enter 1.

The analog switch 3-1 displays the level of either the audio signal input to the input terminal Xo or the volume position signal input to the input terminal XI on the level display device 2. For example, during the time when the switching signal is input to the selection terminal A of the analog switch 3-1, a volume position signal is input to the audio level display IC 1, and the LED corresponding to the analog volume position signal is made to emit light. I am trying to display the level. At other times, the level of the audio signal is displayed.

The amplifier 7-L 7-2 is used to amplify the power of the audio signal after the gain has been adjusted by the electronic volume 4 to make a speaker sound, and the mixer 8 is used to output the line stereo signal (left) and R (right). A device that mixes signals to generate a monaural audio signal, an amplifier 9 that amplifies this monaural audio signal, and an A/D converter 10 that converts the 7 analog monaural audio signal into a digital value and sends it to the CPU bus. This makes it possible to read the information from the source.

Next, the operation will be explained.

In FIG. 2, UP or D constituting switch 5
When one of OWN is pressed, switch status circuit 6-
1 inputs a push signal and an UP/DOWN signal to the electronic volume 4. The electronic volume 4 generates an oscillation signal in response to the press signal, and inputs this oscillation signal from the terminal O5C to the positive terminal (ten terminal) of the comparator 6-2. The comparator 6-2 extracts a portion of the input oscillation signal that is higher than the reference voltage V rat, smooths it with the smoothing circuit 6-3, generates a switching signal, and inputs it to the analog switch 3-1. The analog switch 3-1 to which this switching signal is input is connected to the electronic volume 4.
Select the volume position signal input from , input it to audio level display IC1, and level display device 2.
The corresponding LED on the top is made to emit light to display the level of the volume position.

In addition, electronic volume 4, push signal and UP/DOW
Based on the N signal, the oscillation signal internally oscillated by the press signal is counted (added x/ilI&'') and the line L
, R is used to adjust the amplitude (gain adjustment) of the stereo audio signal input from the speakers 7-1, 7-2, and output the sound from the speakers through the amplifiers 7-1, 7-2.

〔Effect of the invention〕

As explained above, according to the present invention, the switch UP
/[) Since the level of the polynyme position of the electronic volume 4 is displayed on the level display device 2 during the OWN operation, one level display device 2 can be used in two ways. In addition, even when there is no sound, you can press the UP/DOWN switch to know the approximate volume of the sound, which prevents you from being surprised by a sudden sound that exceeds your expectations.
When the N operation is not performed, the level of the audio signal is displayed on the level display device 2 and the Jii! You can adjust the volume to the desired level.

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 shows a specific circuit example of the present invention.

In the figure, 1 is an audio level display IC 12 is a level display device, 3 is a selector, 3-1 is an analog switch, 4 is an electronic volume, 5 is a switch, 6 is a switch state detection circuit, 8 is a mixer, 10 is an A/ Represents a D converter.

Claims (1)

[Claims] A level display device that displays the level of an audio signal or a volume position signal, which includes a level display device (2) that displays the level of the audio signal or the volume position signal, and a level display device (2) that displays the level of the audio signal or the volume position signal; A selector (3) which selects one and inputs it to the level display device (2), and a switching signal from the time of UP/DOWN operation to the electronic volume (4) until a predetermined time elapses after the said operation is completed. A switch state detection circuit (6) that inputs input to the selector (3) is provided. An audio/volume position level display device, characterized in that the level display device (2) displays the level of a volume position signal input from the device (2), and displays the level of an audio signal at other times.