The ability to delete a music file directly from Audacious can be useful. However, the version of Audacious that ships with latest Ubuntu does not have this feature. Thankfully, it has been implemented as a plugin and ships with Audacious 3.5.2.
To remove your Audacious and install the latest Audacious from PPA:
$ sudo apt-get remove audacious $ sudo add-apt-repository ppa:nilarimogard/webupd8 $ sudo apt-get update $ sudo apt-get install audacious
To turn on the feature to delete files, enable Files -> Settings -> Plugins -> General -> Delete Files. Right-click on a file in the playlist and choose Services -> Delete Selected Files. The files will be moved to Trash, so you can recover them later if you want.
Tried with: Audacious 3.5.2 and Ubuntu 14.04