The trio played piano, guitar, cello, flute, percussion, and organ, all of which were electronically treated by engineer Konrad (Conny) Plank.

According to Conrad Schnitzler in a 1980 interview he gave to David Elliott an advertisement by an organist interested in new music led to the recording session being sponsored by a church.

These early copies were issued by the dubious reportedly Luxembourg-based Germanofon label, who produced numerous unauthorized and illegal (bootleg) Krautrock reissues and managed to get them into mainstream distribution.

The album was first legally reissued on the U.S. based Hypnotic label in 1996 with new cover art and a sticker touting Cluster and Conrad Schnitzler's previous membership in Tangerine Dream.

The album was also reissued on the Japanese Captain Trip label on April 20, 2007 as a 450 copy limited CD edition with an adaption of the original cover art and a bonus track by Schnitzler's later band Eruption, "Cold Winter", from their 1971 sessions.