If this looks crunchier than normal it's because it's using emulation from Nuked-OPN2, a cycle accurate YM3438 emulator. Credit to Corrscope for being able to track these rowdy waveforms. Masahiro Kajihara / Gainax 1994
This is because the PCM is handled by the 8-channel sample synthesis chip Ricoh RF5C68 while the Yamaha YM2612 can work on the 6 FM synthesis channels in a similar manner to the Sega Mega-CD.