If the music cd is in /dev/cdrom[1-x] and not /dev/cdrom amarok failed to read the cd.
For me it showed up as having no tracks. Now call the audiocd io slave with the correct device

audiocd:/<path>?device=/dev/sr0

Kudos to Kevin Ottens for the explanation.
Hacking solid was no fun tho.

These bugs please check if it helps for your problem too.