Johannes "Hannes" Bauer was a German trombonist of improvised music and free jazz. He was the brother of the trombonist Conny Bauer.
He was born in Halle. From 1979 onwards, he worked as a freelance musician in Berlin.
Among others, he worked with the following groups: the Manfred Schulze Wind Quintet, Doppelmoppel, Slawterhaus, Futch, Ken Vandermark Territory Band, and the Peter Brötzmann Tentet.
Bauer died on 6 May 2016 at the age of 61.
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