NTS aired an episode dedicated to the music of Jon Hassell on 30 June 2021. Jon Hassell has been played over 400 times on NTS, first on 11 February 2014. Jon Hassell's music has been featured on 356 episodes.

Jon Hassell (born March 22, 1937, Memphis, Tennessee, died June 26, 2021) was an American musician and trumpet player. He is most well-known for his special trumpet technique learned from training with Indian classical musicians such as singer Pandit Pran Nath. Hassell learned to apply a unique style of trumpet playing by mimicking Nath's vocal stylings, and later connected with Brian Eno and began using harmonizer effects on his recordings. Hassell is also known as the creator of "Fourth World" music, which is a combination of ancient music and "futuristic" technological treatments.

Hassell studied with Karlheinz Stockhausen in the 1960s and worked with Terry Riley, first appearing on record on Riley's recording of In C. He was a member of La Monte Young's ensemble. Riley, Young, and Hassell all studied with Pandit Pran Nath.

Hassell co-composed with Pete Scaturro the electronic theme music for the hit television show The Practice.

He has played trumpet on CD's by (a.o.): Talking Heads, David Sylvian, Peter Gabriel and k.d. lang.