If audio-CD does not mount, find the CDROM and add it to the /etc/fstab file and reboot computer.

Command dmesg | grep sr tells CDROM´s name

The line to add if CDROM is /dev/sr0

/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0

PS. Of course there must be a folder for a CDROM too, so add it first.

sudo mkdir -p /media/cdrom0