To uninstall audacious just follow these instructions.
/debian/stretch/main///install/index.html small and fast audio player which supports lots of formats Debian 9.0 sound 3.7.2-1+b1
sudo apt-get remove audacious
Which will remove just the audacious package itself.
sudo apt-get remove --auto-remove audacious
This will remove the audacious package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for audacious then this will work.
sudo apt-get purge audacious
Or similarly, like this audacious
sudo apt-get purge --auto-remove audacious
|Maintainer||Debian Multimedia Maintainers
|Description||small and fast audio player which supports lots of formats|