YM3812
1985
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 YM3812 Chip | |||
| Latest Revision: | — | ||
|---|---|---|---|
| Release Date: | 1985 | ||
| Company: | Yamaha | ||
| Developer(s): | Unknown | ||
| Category: | Audio Hardware | ||
| Type: | Synthesizer | ||
| Website: | www.yamaha.com/ | ||
A.K.A.
Description
The YM3812, known more colloquially as the OPL2, is an integrated circuit created by Yamaha. Specifically, it is a programmable sound generator which creates audio waveforms using FM synthesis. The YM3812 was used in many arcade games, but was especially popular on home computer sound cards from the late 1990s to the mid-1990s, particularly in the AdLib Music Synthesizer Card and SoundBlaster lines. The YM3812 outputs mono audio, but some sound cards, like the SoundBlaster Pro, linked two chips together for stereo output.
Yamaha created an entire family of chips designated OPL, which is short for FM Operator Type-L. The YM3812 is the second chip in the line and is fully backward compatible to its predecessor, the YM3526, or OPL. In fact, the two chips are identical except for the additional 3 waveforms of the YM3812. Another near identical chip is the YM2413 or OPLL, a slimmed down version of the YM3812. The chip's successor is the YMF262 or OPL3, which was found on many 16-bit sound cards.
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