Well i have turned on eax and i think its sounds a lot better, and i also have a sound card that supports it, but it seems to chop up my game quite a bit, and of you find a way to get around that problem? Also im gettn a 5.1 sound system and if eax is too much to handle will miles 2d positional audio work with surround sound? Also what is the difference between eax, eax2 and eax 3?.. plz write back if u know any of these answers ty:)
The difference between EAX and newer versions (the newest one is EAX 4) is better performance and better quality as you would expect with a newer product. About your issues, I don't think there is something you can do that doesn't affect the sound quality, but you can update to the latest drivers for your soundcard if you don't have them allready. And yeah Miles works with 5.1 too.