Amarok can be installed by installing the amarok package. For example, using apt-get:
Amarok versions currently in Debian
Amarok plays media via the Phonon multimedia framework. You can choose either VLC (recommended) or GStreamer Phonon backend.
GStreamer
apt-get install phonon-backend-gstreamer
VLC
apt-get install phonon-backend-vlc
Please note that some Amarok features might not be available with this backend. See /usr/share/doc/amarok/README.Debian (2.8.0-1 or later) for details.
Xine (Debian oldstable only, deprecated in later versions)
apt-get install phonon-backend-xine
For more on Phonon, see the Phonon page.