DJIncendration1

Yes. FCEUX (2.3.0 and later), Mesen and BizHawk's QuickNES core all emulate sound accurately.

Also, the sound issues appear to be on the square 2 channel.

Nestopia UE is also inaccurate in terms of sound for some games, including MTPO.

Mesen is pretty fast, too. Better yet, it's accurate (aside from the additional frame like FCEUX.)

I really think this would be a great core to add, as I'm having trouble using LibTAS with my screen reader. I want to make a TAS of Final Fantasy...

Yes, I'm referring to the whistle sound. The Dragon Chan kick actually has a punch sound on one speaker for both the arcade and Mame. It's the other speaker that's...