Editing Radio-Activity (section)

== Composition and recording ==
The album was recorded in [[Kling Klang Studio]], [[Düsseldorf]],<ref name="dig" /> and it was self-produced by Hütter and Schneider.{{Citation needed|date=October 2022}} It was their first purely electronic album,<ref name="cambridge99" /> and the first one to be performed by the "classic" band line-up.<ref name="omnibus70">{{cite book |last1=Esch |first1=Rudi |title=Electri_City: The Düsseldorf School of Electronic Music |date=26 August 2016 |publisher=Omnibus Press |isbn=978-1-78323-776-0 |page=70 |url=https://books.google.com/books?id=GUn_DAAAQBAJ&dq=kraftwerk+%22radio-activity%22+hutter+schneider+bartos+flur&pg=PT70 |access-date=27 October 2022 |language=en}}</ref> Karl and Wolfgang worked on electronic percussion.<ref>{{cite book |last1=Hardy |first1=Phil |last2=Laing |first2=Dave |title=The Da Capo Companion To 20th-century Popular Music |date=21 August 1995 |publisher=Da Capo Press |isbn=978-0-306-80640-7 |page=531 |url=https://books.google.com/books?id=CCoaAQAAMAAJ |access-date=27 October 2022 |language=en}}</ref> LP liner notes state music and production was by Hütter and Schneider, with [[Emil Schult]] collaborating on lyrics. For this album, the band had decided to record some vocals in English and Schult's command of the language after studying for a while in the United States was better than Hutter's or Schneider's. Tim Barr pointed out the impact his experiences had in the United States on his ability to speak the language and in more subtle ways as well.{{sfn|Barr|2013|p=96}} Schult also designed the artwork, which was based on a late-1930s '[[Volksempfänger|Deutscher Kleinempfänger]]' radio.{{Sfn|Stubbs|2014|p=145-147}}

The overture instrumental piece "Geiger Counter" used Geiger counter beats based on [[musique concrète]].<ref>{{cite web |title=Kraftwerk: Radioactivity |url=https://www.clashmusic.com/features/kraftwerk-radioactivity/ |website=Clash Magazine Music News, Reviews & Interviews |access-date=27 October 2022 |date=13 February 2013}}</ref> The album featured use of the distinctive [[Orchestron|Vako Orchestron]] keyboard to provide vocal choir on title track.<ref>{{cite web |title=Vako Orchestron - Kraftwerk - Trans-Europe Express & Radioactivity |url=https://www.matrixsynth.com/2011/01/vako-orchestron-kraftwerk-trans-europe.html |website=MATRIXSYNTH |access-date=27 October 2022}}</ref> "Antenna" used an echo chamber effect, and Hütter's [[Farfisa]] electronic piano was used on "Transistor".{{Sfn|Stubbs|2014|p=145-147}} For the recording, extensive use was made of the [[vocoder]].{{Citation needed|date=October 2022}}