Audio signal switching device

Abstract

The invention discloses an audio signal switching device, comprising an MCU (microprogrammed control unit) module (1), wherein an input interface of the MCU module (1) is connected with a computer (2); an output interface of the MCU module (1) is connected with an audio switch chip AS1747; the MCU module (1) transmits a switching command transmitted by the computer (2) to the audio switch chip AS1747; an input channel of the audio switch chip AS1747 is respectively connected to different audio equipment; an output channel of the audio switch chip AS1747 is connected to a standard signal test source (3); the switching command transmitted by the computer is received by virtue of the audio switch chip AS1747; to-be-switched audio equipment is switched into the corresponding channel, thus audio connection is built by the audio equipment and the standard signal test source. The switching device is simple in structure; switching between different audio equipment and the standard test signal source can be rapidly achieved; the problem of audio signal distortion in a switching process of an ordinary relay and an analog switch is avoided, and therefore, the communication quality is ensured.

Description

technical field [0001] The invention relates to the communication field, in particular to an audio signal switching device. Background technique [0002] In the field of communication, audio signals are widely used as a medium for transmission, and the transmission quality of audio signals is becoming higher and higher. In some demanding industries, audio equipment generally needs to be strictly Strict testing and simulation are generally required before being put into use; generally, these audio devices are connected to a standard test signal source, so that the standard test signal source performs a simulation test on each audio device separately, and in a certain During an audio device simulation test, the audio device must be switched to a standard test signal source. At present, manual switching is generally used: first, an audio device is manually connected to a standard test signal source, and the standard signal source is used to test the audio device; Then, remove ...

AI Technical Summary

Problems solved by technology

However, the above switching method requires the staff to connect and unplug each audio device, the operation process is cumbersome, the efficiency is low and the labor force is greatly wasted.

In addition to the traditional manual method, there is another way to switch audio signals using ordinary relays or analog switches. Although this method can realize automatic switching and improve efficiency, ordinary relays and analog switches are switches of physical devices. The cause of the lead wire or contact will introduce noise, resulting in distortion of the audio signal, and the quality of the signal cannot be guaranteed during the switching process, making it impossible for normal communication between the standard signal source and the audio device

Images