source: http://www.uluga.ubuntuforums.org/showthread.php?p=7332557
Soluition:
1) Use Synaptic Package Manager to load "mt-daapd"
2) Edit /etc/init.d/mt-daapd to add the "DAEMON_OPT=-m" assignment
3) Create file /etc/avahi/services/daap.service containing
Code:
%h
_daap._tcp
3689
_rsp._tcp
3689
4) Start the mt-daapd ('/etc/init.d/mt-daapd start')
5) web-browser http://localhost:3689/ to configure Firefly. Let the initial scan run until it has found all your tunes, then create your smart playlist(s).
6) Restart your Roku Soundbridge and select a playlist.