I tried to solve the problem of rather crappy sound on my workhorse PC, so I bought a low-profile PCI soundcard:
$ /sbin/lspci | grep -i audio
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
04:01.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
I blacklisted the onboard soundcard like this:
# echo "blacklist snd_hda_intel" > /lib/modprobe.d/onboard-sound.conf
The new card works in the sense that I have sound all right. But when I play back some music in Audacious, I have some unnerving jitter. Every five to ten seconds, every song on my playlist has a little "hiccup".
Now what can I do to get rid of that?