I think you should try to describe the noise and circumstances a little. Is only with mp3 (not with wave, for example) ? Will be influenced by loudness ? (alsamixer PCM gain, or equalization) Is the same in different players, like vlc and amarok ?
Perhaps you can drop a note at http://alsa.opensrc.org/index.php/Sound_cards ? (if the problem is card specific) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]