Michael Formanek (born May 7, 1958) is an American jazz bassist born in San Francisco, California and associated with the jazz scene in New York City. In the 1980s, Formanek worked as a sideman with Freddie Hubbard, Joe Henderson, Dave Liebman, Fred Hersch, and Attila Zoller. His debut release as a leader was 1990's Wide Open Spaces, featuring saxophonist Greg Osby, violinist Mark Feldman, guitarist Wayne Krantz, and drummer Jeff Hirshfield. In 1992 he released Extended Animation with the same ensemble, except with Tim Berne replacing Osby on sax.

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