The Sperm has been played on NTS shows including No Weapon Is Absolute, with Jazz, Jazz first played on 26 April 2016.

The Sperm was a Finnish underground band formed in 1967 by Mattijuhani Koponen and Pekka Airaksinen. The band was the biggest name of Helsinki underground, having in its line-up among all Mattijuhani Koponen, P.Y. Hiltunen, Antero Helander, J.O. Mallander, Markus Heikkerц and the musical primus motor Pekka Airaksinen. The group arranged happenings, performances and concerts (with appropriate psychedelic light shows); and managed to cause some debate and public outrage at the time in Finland. Sperm created their experimental compositions using only various guitar effects and tape manipulations; the results of which could these days be called "ambient noise".