Yamaha YM3812

The Yamaha YM3812, also known as the OPL2 (OPL is an acronym for FM Operator Type-L), is an FM synthesis sound chip created by Yamaha in 1985. It was widely used in PC sound cards and some Yamaha keyboards. The YM2413 (OPLL) is a simpler version of the IC.

YM3812

 * Yamaha PSR-11 49-keys 16-sounds (1986)
 * Yamaha PSR-12 49-keys 32-sounds (1987)
 * Yamaha PSR-31 61-keys 16-sounds, additional YM3301 chip for drums (1991)
 * Yamaha PSR-32 61-keys 32-sounds, additional YM3301 chip for drums (1987)
 * Yamaha PSS-360 49-keys 21-sounds, low-cost mono version of PSS-460 (1986)
 * Yamaha PSS-460 49-keys 21-sounds (1986)
 * Yamaha PSS-470 49-keys 21-sounds (1987)
 * Yamaha PSS-560 49-keys 21-sounds, additional YM3301 chip for drums (1986)
 * Yamaha PSS-570 49-keys 21-sounds, additional YM3301 chip for drums (1987)

YM2413

 * Yamaha PSR-6 49-keys 100-sounds (1994)
 * Yamaha PSS-140 37-keys 100-sounds (1988)
 * Yamaha PSS-170 44-keys 100-sounds (1986)
 * Yamaha PSS-270 49-keys 100-sounds (1986)