In 1971, Guru Guru had already released two LPs on Rolf-Ulrich Kaiser"s Ohr label, distributed by Metronome in Hamburg, namely "UFO" (1970) and "Hinten" (1971). On September 21, 1971, Guru Guru played in the then line-up of Mani Neumeier (drums, vocals), Uli Trepte (bass) and Ax Genrich (guitar) in the auditorium of the Bremen High School at Leibnizplatz. The sound engineers of Radio Bremen were present and took the opportunity to record the concert. Guru Guru"s program that evening consisted of three long pieces with extensive improvisations: the almost 24-minute opener "LSD Marsch" was taken from the 1970 debut album, followed by "Bo Diddley" and "Space Ship" from the then current second album. "Hinten" had just been released shortly before the Bremen concert and had already caused quite a stir in the press. "With this recording, sound engineer Conny Plank has created a masterpiece," wrote the German music magazine Sounds: "The Gurus have musically changed a lot for the better, their music is no longer so nervous and scattered, the long, free excursions of the three instrumentalists now lie over calm, drawn-out bass lines and a powerfully marching drum set. The idiosyncratic blend of rock, jazz and funk with African polyrhythms and psychedelic sound cascades is finally available in its full length and revised form in record stores and, of course, digitally.