Audacious is a popular music player among Ubuntu users and the new release has some important updates. Notable are

- New "queue manager" window which shows the songs queued in the current playlist
- New configuration system, which does fewer disk writes and has a cleaner API
- New plugin to convert from mono to stereo and vice versa
- Audacious can now run in "headless" mode, controlled by DBus clients such as audtool
- audtool can now query and set "stop after this song" option
- New option to delay loading song information until a song is played, reducing I/O
- Audio CD plugin now reads mixed data and audio CD's correctly
- Dockable plugin windows such as LyricWiki now have a sane default window size

Install Audacious 3.1 in Ubuntu 11.10 Oneiric Ocelot

Add the PPA to the respository by using the following commands and install the music player

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install audacious