Trancemaster is a CD compilation series, issued by the label Vision Soundcarriers, a sub-label of Eurovision Soundcarriers.
As a result, early volumes contained a variety of genres, including ambient house, Goa trance and techno, as well as a sub-title (such as 'The Goa Gap' or 'Hardtrance Experience'), but gradually the series stabilized to become centred on the European trance sound.
Initially each edition featured a single disc of 12" mix tracks, before double disc volumes began with 'Trancemaster 7 - The Future Watch'.
[1] In 2013 Vision soundcarriers announced that due to piracy the label would no longer release any new albums.
Their domain vision-soundcarriers.de is currently available, and its last content can be found in the internet archive here: Former website before being removed