Abstract: A chord-generating synthesizer system including an electronic keyboard instrument and a remote control unit operable by a musician's foot--while the musician is using both hands to simultaneously play an instrument such as a guitar. The keyboard instrument is formed with circuit electronics for generating polyphonic music, and has internal wiring that provides a plurality of normally open circuit loops. Each circuit loop includes a pair of connector output terminals for closure of the loop. The circuit electronics is responsive to closure of the loops for generating a note or chord. The remote control unit is separate and external from the instrument, but is selectively connected to the instrument by a multi-lead cable; the unit includes multiple connector inputs and a plurality of switches. Each switch is wired between at least a pair of the connector inputs for remote control of the chord-generating function of the keyboard instrument.