|“||Nobody wanted to play with us because we did all kinds of strange things... feedbacks and overtones and sounds and rhythms. No drummer wanted to work with us because we had these electronic gadgets.||”|
Perhaps the least characteristic album of their output, it features little use of synthesizers, the instrumentation being largely electric guitar, bass guitar, fluteand violin. The electronics on display generally belong to the realm of 1960s tape-based music more usually produced in academia, with heavy use of tape echo (for example the massed looping flute layers of "Strom"), and reverse and altered speed tape effects. Overall, the sound has a rather muted, twilit, dusky feel, similar in feel to "Megaherz" on Kraftwerk's debut album, as Hütter and Schneider explored the possibilities for electronic and auto-mechanical enhancement of their music.
The lengthy, almost side-long "Klingklang" which opens the album is notable for its use of a preset organ beatbox to provide the percussion track. It opens with a clangourous Stockhausen-like metallic percussion montage and gives rise to the unmistakable Kraftwerk sound. Later, the song title also became the name of the band's own self-built studio, in Düsseldorf. "Atem" is a recording of breathing, while "Harmonika" features a tape-manipulated mouth organ.
The cover design, credited to Ralf and Florian, further hints at a deliberate association with conceptual art, being a virtual repeat of the first album's pop artdesign – except printed this time in fluorescent green and with slight modification by the number '2'.
It was eventually released in the UK, combined with the first Kraftwerk album as a double LP package, by the Vertigo label in March 1973, more than a year after its German release in January 1972.
No material from this album has been performed in the band's live set since the Autobahn tour of 1975, and to date, the album has not been officially reissued on compact disc. The band is seemingly reluctant to consider the release as a part of their canon; in later interviews, Schneider described the first three Kraftwerk albums as "archaeology". However, pirated CDs of the album have been widely available since the mid-1990s on the Germanofon and Crown labels. Kraftwerk has hinted that the album may finally see a re-mastered CD release after their Der Katalogbox set.
- "Klingklang" - 17:36
- "Atem" - 2:57
- "Strom" - 3:52
- "Spule 4" - 5:20
- "Wellenlänge" - 9:40
- "Harmonika" - 3:17