In recent years, with the rapid development of science and technology, the application of single-chip microcomputer has been deepened, and the traditional control test has been updated rapidly. In the real-time detection and automatic control of microcomputer application system, single chip microcomputer is often used as the core knowledge component, and it is not enough to have single chip microcomputer. It should be improved according to the specific hardware structure and the characteristics of specific application objects, combined with software.

Nowadays, there are not many music chips that use single-chip microcomputer to control the music playback of provincial bureaus, but single-chip microcomputer is the most widely used to store music and control playback. It has the characteristics of multi-function, competitive price and simple external circuit, and is very popular among music lovers and music chip manufacturers. This paper introduces the AT89C5 1 chip and some external music playing control circuits.