The short-lived German band Häx Cel from Hanover existed for just one year, between late 1971 and the winter of 1972. The line-up consisted of singer and flautist Dieter Neumann, keyboardist Achim Neubauer, bassist and singer Michael Moebus and Rainer Greffrath on drums. During this period, they first released a single, followed by their debut album, before disbanding at the end of 1972. Several live concerts and appearances as the support act for well-known bands, as well as positive press reviews, brought the quartet regional recognition. The jazz drummer and label owner Dietmar Siebrasse (aka Dizzy Brassé) was so impressed after one of their performances that he decided to record an album with them.

A single was released in June 1972, followed by a live concert at the Beethovensaal in Hanover was recorded on 29 October. This live recording was released later that same year as the first LP on Siebrasse’s tiny label, Dizzy Records, for which he also acted as producer. Their music, a kind of fusion of classical music with elements of progressive rock, consists of adaptations of classical works by composers including Bach, Handel, Vivaldi and Beethoven, which were then embedded in their own rock compositions. Their only album Zwai is one of the rarest German progressive LPs and is highly sought after by Krautrock collectors.