1) Update DAC stuff.May be nice,but still some noise there. 176400HZ was recommended.
2) Use a new technique called 'Twirler' to improve YM2612 playback.
3) Update 3D surround.
4) Update Gens32 Antialiasing III to Gens32 Antialiasing III Advance. Add mix color stuff in advance version to make it looks more better.
http://gens32.emubase.de/