Der Transistor

A concept album exploring themes of broadcast communications, Radio-Activity marked Kraftwerk's return to more obtuse territory, extensively utilizing static, oscillators, and even Cage-like moments of silence to approximate the sense of radio transmission; a pivotal record in the group's continuing development, the title track – the first they ever recorded in English – is their most fully realized electro-pop effort to date, while "The Voice of Energy" precipitates the robot voice so crucial to their subsequent work.

Amon Düül was a German art commune whose members began producing improvisational psychedelic rock music during the late '60s. The group's members released several albums, mostly recorded during a single extended jam session. Concurrently, some of the commune's more musically inclined members formed the longer-lasting Amon Düül II, who made their debut with 1969's Phallus Dei and continued releasing ambitious efforts such as 1971's Tanz der Lemminge and the more pop-minded Made in Germany (1975). Both acts proved to be a major influence on generations of experimental rock musicians to come and are regarded as pioneers of the Krautrock style.

Amon Düül was a German art commune whose members began producing improvisational psychedelic rock music during the late '60s. The group's members released several albums, mostly recorded during a single extended jam session. Concurrently, some of the commune's more musically inclined members formed the longer-lasting Amon Düül II, who made their debut with 1969's Phallus Dei and continued releasing ambitious efforts such as 1971's Tanz der Lemminge and the more pop-minded Made in Germany (1975). Both acts proved to be a major influence on generations of experimental rock musicians to come and are regarded as pioneers of the Krautrock style.