VirtualBox guest CDROM question

The VirtualBox docs are a bit ambiguous (to me, at least) about the CD/DVD
capabilites of a guest accessing the CD/DVD player. They state that the
device is opened (by the guest) as r/w but they go on to state that this is
only for digital (filesystem) access. Does this mean that an XP guest
session is unable to access an audio CD even as a ro device or have I just
missed a setting somewhere. oS 11.1 host, VB 3.0.0 running XP Pro as

Will Honea