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like YM2203, but with twice the FM channels, stereo, an ADPCM channel and built-in drums ("rhythm")!
it was one of the available sound chips for the NEC PC-88VA and PC-98 series of computers.
it was one of the available sound chips for the NEC PC-88VA and later models of PC-98 series of computers.
the YM2610 (OPNB) and YM2610B chips are very similar to this one, but the built-in drums have been replaced with 6 sample channels.
@ -95,6 +95,12 @@ the YM2610 (OPNB) and YM2610B chips are very similar to this one, but the built-
- `59xx`: **set DR of operator 3.**
- `5Axx`: **set DR of operator 4.**
- `5Bxx`: **set D2R/SR of all operators.**
# system modes
## extended channel 3
in ExtCh mode, channel 3 is split into one column for each of its four operators. feedback and LFO levels are shared. the frequency of each operator may be controlled independently with notes and effects. this can be used for more polyphony or more complex sounds.
all four operators are still combined according to the algorithm in use. for example, algorithm 7 acts as four independent sine waves. algorithm 4 acts as two independent 2op sounds. even with algorithm 0, placing a note in any operator triggers that operator alone.
- `5Cxx`: **set D2R/SR of operator 1.**
- `5Dxx`: **set D2R/SR of operator 2.**
- `5Exx`: **set D2R/SR of operator 3.**