Fix Sound in Ubuntu 9.0.4

Recently we came across an issue where a Ubuntu 9.0.4 desktop suddenly stopped playing sound. All you would get is a crackling noise when trying to play a sound file.

Nothing had changed in recent history, except for potential user based configuration changes, which were rolled back, reset etc.

The general consensus was a conflict or misconfiguration between Pulse and Alsa and the default OSS sound system.

Thanks to Christopher Biltoft who found a solution on the Ubuntu Community site which showed how to remove pulseaudio and blacklist Alsa modules and install the OSS4 sound system instead.

The article with all the detail can be found here.