On Sun, 3 Jun 2001, UrosM wrote: > Maybe this could help : > > http://www.yamaha.com/lsi/products/pdf/212413B20.PDF That's YM2413 OPLL, a cut-down version of the YM3812 OPL2. It has a subset of the capabilities of the OPL2, but is register-incompatible. A while ago I was looking for some of these chips; still haven't found any. Richard