Groups and multidisc albums

[simoncn]

It is fine (and fairly common) for a composition to have non-consecutive tracks. This will not produce an error message. The problem occurs when you try to create a group with non-consecutive tracks.

For example, suppose you have an album with 9 tracks and you try to tag tracks 2, 4 and 6 as a group. This is a problem because either the group would also need to contain tracks 3 and 5 or the order of tracks would need to change to become 1, [2, 4, 6], 3, 5, 7, 8, 9. I have used [ ] to represent the group.