C-Media Audio Card ---> help?

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http://www.linuxforums.org – Hi! I'm using a C-Media CMI8738 Audio Card but... Sound quality is REALLY BAD! and sometimes the sound mutes! I don't know if the driver is outdated (i'm new at linux and i don't want to do something bad...) What I do? :confused: P.S: I'm using ALSA and, sorry for bad english. (HowTos)