Members: Heinz Glass, Michael Karch, Rolf-Dieter Schnapka, Fred Felder, Waldemar Ruth

Penicillin were a German band (based in the town of Kottweiler) rooted in jazz-rock.
Formed in 1971 by Fred Felder (vocals) and Waldemar Ruth (drums), they had changed a lot over the years before their debut recordings. This was down to the fact that the band was often a large metamorphic troupe of up to 12 or 15 musicians, based around a pretty constant core of five, and that they'd experimented with everything from Hörspiel through to classical, combining such elements into their own unique sound.