Wolfgang Gartner - Forever mix?
 

Earlier I heard a mix (20 minutes long or so), which included wolfgang gartner's forever. It included lots of other electronic songs, but I didn't know what they were. It was across 5 tracks, and they were all end-to-end, so you couldn't tell where one song ended and the next started (what is this called by the way?). Does anyone have any ideas what the album could be? If not, can anyone tell me what it's called where an album has no gaps between songs, and they continue from the previous song?
Thanks