JPH0578026U - Audio equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the trouble of adjusting the sound quality each time the music source is switched. When a music source switching key of a key input device is pressed, first in step S1, a signal corresponding to the pressed key is output from the microcomputer to the source switching switch to switch the music source to the designated one. . Next, in step S2, the sound quality setting data is read from the address corresponding to the currently selected source and is output to the sound quality adjusting circuit to perform the sound quality adjustment, and the source switching routine is completed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an audio device that selects audio signals from various sources, adjusts the sound quality, and outputs the sound, and particularly relates to a sound quality adjusting means.

[0002]

[Prior Art]

 Figure 1 shows the general configuration of an audio device that selects audio signals from various sources and adjusts the volume and sound quality for output. Reference numeral 1 shown in the figure is a microcomputer, which includes a ROM and a RAM, operates according to a program written in a ROM and a signal from the key input device 5, and has a source changeover switch 2, a sound quality adjustment circuit 3 and a volume adjustment circuit Operate 4.

The source changeover switch 2 is composed of an analog switch, and selects a signal input terminal from a tape recorder, a tuner, a CD player, or a TV according to a signal from the microcomputer 1 to be an input terminal of the sound quality adjustment circuit 3. Connecting.

The sound quality adjustment circuit 3 is composed of a filter and an electronic volume, and adjusts the high-frequency and low-frequency levels of the input signal according to the signal from the microcomputer 1 and outputs the adjusted signal to the volume adjustment circuit 4.

The volume adjusting circuit 3 is composed of an electronic volume and adjusts the level of the input signal according to the signal from the microcomputer 1 and outputs it to the output terminal. The output signal is power-amplified to drive the speaker.

Conventionally, in the audio device having the above-described configuration, the sound quality adjustment and the music source switching have been performed by independent operations. That is, when the specific source is designated by the key input device 5, the microcomputer 1 outputs a signal for switching to the music source designated by the key input device 5 to the source changeover switch 2, as shown in FIG. The music source switching operation ends.

[0007] The sound quality adjustment and the volume adjustment are performed by different routines, respectively, and are independent of the selected music source.

[0008]

[Problems to be solved by the device]

 In the above-described conventional audio device, when it is desired to enjoy music with respective sound quality for each music source, the sound quality must be adjusted every time the source is switched, which is inconvenient.

The present invention has been made in view of the above points, and its purpose is to store the setting data of the sound quality for each source and switch the setting data corresponding to each source. Is to provide an audio device whose sound quality is adjusted by.

[0010]

[Means for Solving the Problems]

 The audio device of the present invention is an audio device in which audio signals from various sources such as a tape recorder, a tuner, a CD player, and a TV are input, and the audio signals are selected by a selector switch to adjust the sound quality and output. A memory for storing sound quality setting data is provided for each, and the sound quality is adjusted using the setting data corresponding to the selected source when each source is selected by the changeover switch.

[0011]

[Action]

 According to the audio device of the present invention, when adjusting the sound quality, the setting data is stored in the address of the memory corresponding to the source selected at that time, and when the source is selected again, the address is set. The setting data stored in is called, and the sound quality is adjusted by the setting data.

Therefore, it is not necessary to adjust the sound quality to suit the source each time the source is switched.

[0013]

【Example】

 An audio device according to an embodiment of the present invention will be described with reference to the drawings. The configuration of the audio device in which the present invention is implemented is the same as that described with reference to FIG. However, the microcomputer 1 is provided with a RAM that is powered by a sub power source or a battery even when the main power source is turned off, and the RAM stores the sound quality setting data for each source.

In the audio device of the embodiment, when the volume is adjusted by the key input device 5, when the volume is specified, the microcomputer 1 causes the volume adjusting circuit 4 to specify the volume specified by the key input device 5. The setting signal is output to adjust the volume. In this case, the volume is adjusted regardless of the selected music source.

When adjusting the sound quality, when the sound quality is specified by the key input device 5, the microcomputer 1 outputs a sound quality setting signal specified by the key input device 5 to the sound quality adjusting circuit 3. The sound quality is adjusted. In this case, the microcomputer 1 stores the sound quality setting data at the RAM address corresponding to the currently selected music source.

The operation of switching the music source is shown in FIG. When the key for switching the music source of the key input device 5 is pressed, first, in step S1, the signal corresponding to the pressed key is output from the microcomputer 1 to the source changeover switch 2 and the music source is switched to the specified one. Be done.

Next, in step S2, the sound quality setting data is read from the address corresponding to the currently selected source and is output to the sound quality adjusting circuit 3 to adjust the sound quality, and the source switching routine is completed.

As described above, when the source is switched, the sound quality is adjusted by the sound quality adjustment data specified by the source, so that it is not necessary to adjust the sound quality every time the source is switched.

[0019]

[Effect of the device]

 According to the audio device of the present invention, the sound quality is stored for each music source and the sound quality is automatically adjusted when the music source is switched, so that the trouble of sound quality adjustment is eliminated.

Further, as compared with the conventional one, since the change can be dealt with by changing the software of the microcomputer, the cost does not become particularly high.

[Brief description of drawings]

FIG. 1 is a block diagram showing a general configuration of an audio device that selects audio signals from various sources, adjusts volume and sound quality, and outputs the adjusted audio signals.

FIG. 2 is a flow chart showing the operation of the audio device according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an example of the operation of a conventional audio device.

[Explanation of symbols]

 1 Microcomputer 2 Source selector switch 3 Sound quality adjustment circuit 4 Volume adjustment circuit 5 Key input device

Claims (1)

[Scope of utility model registration request] 1. An audio device in which audio signals from various sources such as a tape recorder, a tuner, a CD player, and a TV are input, and the audio signals are selected by a selector switch to adjust the sound quality and output. An audio device, comprising a memory for storing setting data of sound quality, wherein the sound quality is adjusted using the setting data corresponding to the selected source when each source is selected by the changeover switch.