Multiple key electronic instrument having background songs each associated with solo parts which are synchronized with and harmonious with the background song

摘要

An electronic instrument and method includes manual control switches for producing and controlling creative variations on pre- recorded song selections that remain synchronized and melodiously oriented to the selected song substantially independent of the timing of manual operation of control switches. Several instruments of similar design can be connected together to facilitate `playing in a band` of such instruments which synchronize on the song selected via one instrument and which respond to individual solos or riffs `played` on one instrument with corresponding, timed solo or riff capabilities on other instruments.