Tracks 1 to 4 originally released on [m=604] (R&S 1992-01, cat. no. RS 9201). US versions of the EP featured track 9 instead of track 4. Track 4 is an extended version; the original version ("Isopropophlex") was released on [m=870] (1991). Tracks 5 to 8 originally released on [m=984] (R&S 1992-06, cat. no. RS 9209) Track 9 is missing a second of the beginning of the track; the original version was released on [m=870] (1991). Track 10 originally released on [m=19308] (1992). Tracks 11 to 12 are remixes originally released on [m=6696] (R&S 1992-07, cat. no. RS 92019) Track 13 is previously unreleased (rec. 1990).