TerraTec Aureon 7.1 Space (Optical SPDIF output)

# create /etc/asound.conf
cat < /etc/asound.conf
pcm.!default {
type plug
slave.pcm {
type dmix
ipc_key 1478
slave {
pcm "hw:0,1"
format S32_LE
period_time 0
period_size 1024
buffer_size 8192
}
}
}

pcm.!iec958 {
type plug
slave.pcm "hw:0,1"
}
EOF

# test with Mplayer
mplayer -ao alsa:device=iec958 FILE_TO_PLAY

# LINKS
http://alsa.opensrc.org/index.php/Ice1724