I've got a pretty good number of physical CDs and most of them have been ripped and imported into MC. I have several with tracks near the end (like track 98 and 99) and nothing in between. I've got several with giant passages of silence in the middle and then music at the end, to try to trick you into thinking the song is over (hidden in that way).
But I don't know what you mean by track 0 or "hidden track". I've never seen this. What is it?
Brian.
This sort of hidden track is called HTOA for Hidden Track One Audio. The hidden audio is put in the pre-gap area before the first track on the CD. When you play a CD in a regular audio CD player the CD will start at the end of the pre-gap. So it will start playing at the beginning of the first track, essentially hiding any audio that happens to be in the pre-gap area before the first track. To play that audio you have to start playing the first track then use the back button on the CD player to go backwards all the way into the pre-gap and keep on going to get to the beginning of the audio that is hidden there. It's an effective way to hide a track. If you don't know the HTOA is there you'd never find it in normal playback of the CD.
Here's a hydrogenaudio wiki article on HTOA:
http://wiki.hydrogenaud.io/index.php?title=HTOAHere's a wikipedia article that lists CDs that have an HTOA:
https://en.wikipedia.org/wiki/List_of_albums_with_tracks_hidden_in_the_pregapRipping a HTOA track can be tricky. You need a CD drive that is capable of reading into the pre-gap before track 1. Not all drives will. And you need a ripping program that will read into that pre-gap area. Not all will.
I rip an HTOA track by first ripping the CD as a single WAV and CUE file using EAC (Exact Audio Copy). Then I use CUETools to split that CUE rip into tracks. There is a setting in CUETools to keep the HTOA track and make the HTOA a separate track. The setting is in Gaps handling >> Gaps appended + HTOA.