Description of problem:
Having a SB Live soundcard (PCI) on my box, driven by emu10k1. But when 
using F12 Beta, the sound is totally blurred and overdriven.

Board: NVIDIA nForce2 chipset
CPU: AMD ATHLON XP3000+

Version-Release number of selected component (if applicable):
alsa-plugins-pulseaudio-1.0.21-2.fc12.i686
pulseaudio-esound-compat-0.9.19-1.fc12.i686
kde-settings-pulseaudio-4.3-12.noarch
pulseaudio-module-gconf-0.9.19-1.fc12.i686
pulseaudio-0.9.19-1.fc12.i686
pulseaudio-module-x11-0.9.19-1.fc12.i686
pulseaudio-libs-glib2-0.9.19-1.fc12.i686
pulseaudio-gdm-hooks-0.9.19-1.fc12.i686
pulseaudio-module-bluetooth-0.9.19-1.fc12.i686
pulseaudio-libs-0.9.19-1.fc12.i686
pulseaudio-utils-0.9.19-1.fc12.i686

uname -r
2.6.31.5-96.fc12.i686.PAE

lspci:

01:09.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 0a)
01:09.1 Input device controller: Creative Labs SB Live! Game Port (rev 0a)


How reproducible:
each time

Steps to Reproduce:
1. Play sound, e.g. with timidity or mplayer (from rpmfusion)
2.
3.
  
Actual results:
Sound is cracking, even when volume is near 0%

Expected results:
Normal sound

Additional info: