Rhythmbox requires packages like libgpod, libbonoboui, gstreamer, gnome-keyring, and nautilus-cd-burner to be present for the installation to work properly. Banshee needs things like mono, dbus-sharp, hal, gtk-sharp-2, musicbrainz, nautilus-cd-burner, gstreamer and others. In short, much of the normal Gnome environment would need to be on your system. But no, technically you do not need to install a full Gnome desktop to run these applications -- just the actual required programs and libraries.
|