Abstract: A backing chorus reproducing device is disclosed wherein human backing chorus is PCM coded and then combined with MIDI Standard based instrumental sound to produce karaoke music. In reproduction, the instrumental sound and the chorus sound are played back with no out-of-synchronization therebetween. The backing chorus reproducing device comprises a communications controller, an input/output device for inputting an instruction for a music number and a change of scale, a memory for storing karaoke information received, a main controller for analyzing the karaoke information read from the memory to decompose it into header information, song's words information, and musical information, while outputting in synchronism the electronic musical sound data and the backing chorus data of the musical information according to the processing type of the control data included in the header information.