Can was an experimental rock group (commonly credited as the pioneers of the German kraut-rock movement) who released the majority of their more celebrated work from 1968-1979. They often used non-traditional (in regards to rock music, at least) techniques when writing/recording their music–such as improvisation, tape editing as a means of composition, and the creation of soundscapes (utilizing synthesizers, strange vocal performance, and even shortwave radios).
Interesting fact: Kenji “Damo” Suzuki, the most influential of the vocalists that came and went throughout the years, was inducted into the band when the founding members stumbled upon him busking outside of a cafe in Munich, Germany.
Recommended listening: “Vitman C” off of the album Ege Bamyasi. You might have heard this song before–in the opening credits of the movie Inherent Vice (adapted from the novel of the same name by Thomas Pynchon).