- Yamaha YM2151
The Yamaha YM2151, also known as the OP-M (FM Operator Type-M) is a
sound chip in theYM2100 family . It was Yamaha's first single-chipFM synthesis implementation, created originally for theYamaha DX series of keyboards. It has eight voices with four operators per voice.It was also used in
arcade games , starting with Atari'sMarble Madness , and later being licensed for use by many other companies includingSega ,Konami ,Capcom ,Data East Pinball andNamco , with its heaviest use in the late1980s , as well as inSharp X1 andSharp X68000 home computers.This chip was used in some Yamaha budget electric pianos, such as the YPR-7/8/9. It is identical to the chip in the FB-01 (YM2164), except that operator 4 of voice 8 can be used to generate noise, all other data is identical.
Finally, the chip was used in the Yamaha SFG-01 and SFG-05 FM Sound Synthesizer Units. These are expansion units for
MSX computers and were already built in in some YamahaMSX machines like the CX5M. It provides the FM synthesizer with stereo output jacks, MIDI ports and a connector for an external keyboard. Note that at least some SFG-05 modules contain an YM2164 chip.
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