Changes
/* Technical information */
* One setting converts 3 of the FM channels into a 5-channel percussion set
* Another setting pairs 12 of the FM channels into 6 FM 4-op channels
* Both settings can be used at the same time
Also, The base waveform of each chan can be chosen between 8 waveform types, including a square one. So the OPL3 can play square waves like the PSG.
