i use the onboard nForce2 sound
i was going to try the line in port next time i give it a go.
I know theres still some troubles with NF2 boards and sound (lack of sound storm drivers)
Could this be my problem ??
Another problem i have, which might be related is that even with ALSA, only one device can use the sound card at a time
eg if i am playing music and Gaim beeps up, it cuts the music at the end of the song and plays back all queued up Gaim message beeps.