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Jon Hassell

American trumpeter and composer who developed Fourth World music, fusing electronics with non-Western vocal and instrumental technique.

Jon Hassell playing trumpet through an effects rig, mixing console in the foreground

Jon Hassell (1937-2021) was an American trumpeter and composer, a student of Stockhausen and collaborator with La Monte Young, who developed “Fourth World” music — a hybrid of electronically processed trumpet, studio production, and vocal and instrumental techniques drawn from non-Western traditions.

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