First reissue of While the Recording Engineer Sleeps, the first album by The Cocoon, recorded in 1985 and originally released in 1989. The Cocoon was a kind of psychedelic supergroup featuring legendary figures of the German music scene of the 1960s, '70s, and '80s: Gunter Hampel (vibraphone, piano, flute, bass clarinet, lead vocals), Jürgen Gleue (lead vocals, bass, guitar), Matthias Arfmann (guitar, bass organ, electric piano, lead vocals), Rüdiger Klose (drums, vocals), and Thomas Keyserling (flute, alto saxophone). Most songs were written by Hampel and Gleue with Gleue providing the lyrics. The legendary jazz composer, bandleader, vibraphonist, bass clarinetist, flutist, and baritone saxophonist Gunter Hampel is one of the most influential musicians, composers, and pioneers of the worldwide jazz evolution. He is the major instigator of the European jazz movement since 1958. On his own Birth Records label he has recorded more than 200 albums, most of them together with his Galaxie Dream Band. Jürgen Gleue was a founding member of the infamous neo-psychedelic band 39 Clocks, with whom he released four albums between 1981 and 1987. Under the moniker Phantom Payn, he later recorded another six albums of acid-driven psychedelia, and, together with Rüdiger Klose, he also played in the psychedelic rock band Exit Out. Klose also contributed to 39 Clocks, Phantom Payn, and avant-garde group Die Kastrierten Philosophen. First known as a founding member of Die Kastrierten Philosophen, Matthias Arfmann later became famous as the producer of German hip-hop/reggae star Jan Delay. And Thomas Keyserling, also a member of Hampel's Galaxie Dream Band, played with Agitation Free and was a guest musician on two legendary 1970 German krautrock albums: Tangerine Dream's Electronic Meditation and Amon Düül II's Yeti.