I'm italian and my english isn't very good... i'm sorry

I've a lot of problem with audio card. I've a integrated chip C-Media CMI9880 7.1 on Asus p5ad2-e premium.

The digital output doesn't work (any solution?).

The analogic ouput works, without volume control, but from itunes i can control it.

The problem is that if I listen a song, and for example, i open the Graphic Effects from itunes, the audio become distorted, and the song plays very bad. The same thing appened if i open a program, like Word, Photoshop, firefox... i can't listen anything!!
Itunes isn't the cause, becouse i've tested other audio program: all have the same problem.

HELP! Anything work great, display, internet, all programs... but audio not! and for me it's very important!!

Thanks a lot smile.gif

Grazie!!

OS: MAC OS X 10.4.3
CPU: P4 551 @ 3,86
HD: MAXTOR 120gb
VIDEO: nVIDIA 6600GT