The German trio Ainigma was a remarkable school band from Garmisch-Partenkirchen in southern Bavaria. The band members were the teenagers Willy Klüter (vocals, keyboards), aged 18, his brother Michael Klüter on drums, and guitarist and bassist Wolfgang Netzer, both 16 years old. In the spring of 1973, the young musicians recorded their debut album Diluvium in the parish hall in Garmisch using a simple 4-track Revox tape recorder in just two days. It was released in the summer of 1973 as a private pressing in a limited run of just 500 copies, exclusively in Germany.

The album is characterized by heavy fuzz guitars with echoes of West Coast acid rock, as well as distorted organ sounds reminiscent of early American heavy psych bands. Overall, however, it is a fairly straightforward and melodic foray into the realm of heavily distorted guitar rock, accompanied by varied organ playing. Obvious amateurish qualities and the lo-fi recording further contribute to its underground charm, which is also free from the whims of the record industry.

But the band members were dissatisfied, and hardly any albums were sold. A year later, the group disbanded. Nowadays, their first and only LP is highly regarded in psychedelic rock collector circles and fetches correspondingly high prices.