1. Force 8-bit sound option confused some users who thought it might be an emulation accuracy option instead of selecting output bit depth, replaced it with a drop-down that's consistent with the other sound output options instead (hiding the temptation of setting "8-bit" and thinking that's a desirable thing for an NES emulator).
2. Making the default samplerate 48000, because it is the most common native device rate now.
3. Increasing the AVI output's 1 second buffer size to allow the maximum samplerate of 96000.
Brad Smith