Songplayer (from Aminet) will play audio from the SCSI bus.
You need to set up AHI, which you probably have already, and set the scsi device
and unit ID of the CDrom.
Works fine on all(?) SCSI drives and most IDE ones.
Also try MUI CD Player (Aminet) which has drivers to suit most CDroms. Played
audio will only be available at the earphone socket and rear audio port of the
drive.