Any metadata questions?
Release Version (OPTIONAL): Please leave empty, or if have Compilation - you can put version - Unimixed or Mixed By Tiesto etc...
Catalog Number – Your number of catalog (ex. AUR001)
Single - It is one track or remixes of one title.
EP - from 2 to 7 different titles of tracks in release.
Album - Can be 50 min total duration whole release, and all tracks have identical artist names.
Compilation - from 7 to 99 tracks of different artist names.