I haven't listened to anything but lower bitrate movies and fm radio on my tablet so far, but I have noticed fuzz (and mono output) when the headphone jack is not firmly seated. It takes quite a shove sometimes to get it in there, I otherwise have not noticed and sound issues (using decent over the ear sennheiser headphones). I don't want to suggest the obvious, but check the jack,other wise sounds like you might have a bum audio circuit.