- Fix incorrect operator volumes in some cases for OPL (MT8108)
- Fix PCM playback to cut off previous notes when new waveforms are selected (see dragnblz)
- Fix reversed OPM noise frequency
- Fix bug preventing CSM key ons from being noticed
- Fix bug where SSG EG envelope could be left in inverted state
- Fix SSG envelope handling when tone and noise are off
- Increase strength of DAC discontinuity in YM2612
- Improve latching logic for fnums in OPN
- Increase envelope suppression threshold so some effects don't get prematurely muted
- Improve ADPCM-B behavior at stop/limit addresses (more thorough rewrite here coming later)