I know what you mean the sound appears very muffled. Could be the amount of channels on the Pocket PC ? I also have the same problem with some of the latest GBA games

Its a pity about the sound but yeah its cool on the Asus. If you have MegamameCE theres tons of games to possibly play, finding the right game is tough as theres so many different builds of 0.36 roms it seems but i've found about 40 or so at the moment and theyre working superbly