The Yamaha PortaSound PC-50 is an entry-level portable musical keyboard produced by the Yamaha Corporation in 1983.
Specifications 44 keys 6 voice polyphony: organ, violin, clarinet, piano, harpsichord, and vibraphone 6 rhythm patterns: march, waltz, slow rock, jazz rock, swing, rumba Power source: 9VDC by six "C" size batteries or external Output ports: 3.5mm headphone jack, aux RCA connector, and expression pedal. Input port: power in: 9-12VDC
References
External links Yamaha PC-50 Owner's Guide at manufacturer's site Yamaha history of electronic music instruments