目前,有相当一部分中高档电子琴使用集成电路M208作音源电路,并配用一定的外部电路以充分发挥其功能。本文介绍一种配合M208使用的伴奏电路。一、电路功能本电路可给出:一组触发8种打击乐节奏音源的触发信号;一组配合M208改变BASS(低音)音高及给出BASS触发时刻的ABC信号;一个长短BASS At present, a considerable part of the high-end electronic keyboard uses integrated circuit M208 as the audio circuit, and with a certain external circuit to give full play to its function. This article describes an accompaniment circuit used with the M208. First, the circuit functions This circuit can be given: a group of triggering eight kinds of percussion rhythm sound source trigger signal; a group with the M208 change BASS (bass) pitch and gives the BASS trigger time of the ABC signal; a length BASS