Olli Aarni has been played over 20 times on NTS, first on 25 April 2020. Olli Aarni's music has been featured on 24 episodes.

Olli Aarni is a Finnish sound artist and musician based in Helsinki. His work combines a range of analog and digital processes. Active since the early 2010s, Aarni has released music on labels including Laaps, Dauw, Longform Editions, Students of Decay and Mondoj. In addition to solo recordings (also as Ous Mal or Nuojuva), he has participated in collaborations, sound poetry and audiovisual projects. Aarni holds a Master of Arts in Finnish language from the University of Helsinki.