How to activate MP3 in Ubuntu 9.04

Playing MP3s doesn't work by default in the new Ubuntu (Jaunty Jackalope).

Here's what I did to get it working.

• Start up Synaptic (System>Administration>Synaptic)
• Click on Settings>Repositories
• Select all repositories that are downloadable over the internet
• Click on Close
• Click on Reload
• When it is done reloading, close Synaptic
• Click on any MP3 file; Movie player should start up.
• It will ask if you want to add the necessary codecs. Answer yes, and let it do it.

The end.