The PSR-31 uses 2-operator FM synthesis based on the Yamaha YM3812 OPL chip.
Year Released: 1991
Keyboard: 61 keys
Polyphony: 9 notes
ROM: 16 sounds, 16 rhythms
Dimensions: 913 mm x 331 mm x 96 mm
Weight: 6.8 kg
This keyboard has built-in 2.5-watt stero speaker(s).
Batteries: D x 6
Yamaha Portatone PSR-31 Service Manual [Three Wave Music] ($12)
Power Supply Replacement for YAMAHA PSR-31 KEYBOARD ADAPTER UK 12V ($14.36)
YAMAHA PSR 31, mid 80s, FM sounds, PCM rhythms ($96.68)
Rockville 61 Key Keyboard Case w/ Wheels +Trolley Handle For Yamaha PSR-E263 ($119.95)
The Sound Programming site is copyright © 2006-2024 Jason Champion.