The gap is optional too. You can burn CDs with no gap between audio tracks. I've done this for disks that are just one continuous track. I break it up into 9

The gap is optional too. You can burn CDs with no gap between audio tracks. I've done this for disks that are just one continuous track. I break it up into 90 small tracks with 0 gap between them. This way if you need to pull the disc out and continue playback on a different device you can seek to the track instead of having to hold down the fast forward button for ages.