DUET SOUND GENERATING METHOD OF ELECTRONIC MUSICAL INSTRUMENT

摘要

The duet sounds are provided by turning on both of an automatic chord (1) and duet (2) switches. When the melody key (3) is pressed, a microprocessor (5) determines the present chord like minor or major key. If it is a major key, the microprocessor provides the dual data to an IC (6), which one corresponds to the present key and another to the major three degree. If it is a minor key, the microprocessor provides the dual data to the IC, which one corresponds to the present key and another to the minor three degree so dual sounds are generated by pressing one melody key.