The first and only album by the obscure and short-lived band McChurch Soundroom, produced by Jürgen Schmeisser with the collaboration of Conny Plank as sound engineer. Formed in September 1970 in Basel, Switzerland, the band consisted of singer and flautist Sandro Chiesa (aka Sandy McChurch), guitarist Heiner Althaus, bassist Kurt Hafen and Norbert „Nobbi“ Jud on drums. Keyboardist and singer Alain Veltin, who joined later, completed the quintet. After countless sessions in their rehearsal room known as the „Soundroom“ – an old pumping station made available by the local municipality – they secured a record deal with Pilz, the fledgling BASF sub-label.

In just two days, on 3 and 4 June 1971, they recorded their debut album Delusion at Star Studio in Hamburg, which was released in Germany that same year. They played jazz-influenced, at times hard-hitting blues-rock jams, complemented by progressive arrangements featuring a Hammond organ and expressive flute elements. However, they only released this one album, and the group split up soon afterwards. Not only is it one of the rarest releases on the highly sought-after Pilz label, but also the iconic cover featuring a skull in melting candle wax, designed by Holger Matthies, certainly plays a major part in the album’s legendary status as an ultra-rare collector’s item.