Comment 9 for bug 751265

Here is another case. I have same problem mentioned in recorded audio sample (#7).
Problem comes out with other applications also: rhytmbox, totem, xine, flashplugin ...

Ubuntu 11.04 (fresh installation)

Linux 2.6.38-8-generic x86_64 GNU/Linux

Pulseaudio: 1:0.9.22+stable-queue-24-g67d18-0ubuntu3
vlc: 1.1.9-1ubuntu1

Old installation of Ubuntu10.04 has no this kind of problems with audio quality.

Command pulseaudio -k helps in most cases. Sometime new starting distortion "fade away" during playback after few seconds.

Other problem with pulseaudio -k is sound levels. After restart of my computer Uubuntu sound theme after login is absolute too loud. Now it is not possible to know what is normal audio level because there is variations of sound levels after pulseaudio restart.