- Yamaha YM3526
The YM3526, better known as OPL (for "FM Operator Type L"), is a
sound chip that was manufactured by Yamaha. It was aimed at the low cost market. It usesfrequency modulation synthesis to generate sound, and has 9 channels with 2 operators each. Its follow-up was the popularYM3812 (OPL2), to which it was very similar - the "OPL2" added only the possibility of using 4 differentwaveform s instead of onlysine wave , and was otherwise backwards compatible. The "YM3526" (OPL) was used in aCommodore 64 expansion, the "Sound Expander" which was never very popular, as well as severalArcade game s, such asBubble Bobble .A very closely related chip is the "Y8950", or MSX-AUDIO, which was used as an
MSX expansion. It is basically a "YM3526" (OPL) with the added capability of recording and playingADPCM samples using up to 256KB sample-RAM and 256KB of sample-ROM. The simpler and incompatible YM2413 was more popular though.External links
*http://www.oplx.com/
Programming information about the OPL series sound chips. Has very little on the YM3526 though.
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