Fedora with noisy audio
If at any given moment the audio is very noisy, which happens most often when using Kontact or Kmail, edit the following file
[root@amd64 ~]$ nano /etc/pulse/default.pa
and look for the following section:
### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect
.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
.endif
Fedora has support for udev, so edit the first line of load module to
load-module module-udev-detect tsched=0
Then restart pulseaudio or restart the computer.
[pratajo@amd64 ~]$ pulseaudio --kill
[pratajo@amd64 ~]$ pulseaudio --start