The playing of multi-instrumentalist Gebhard Ullmann is full of power and radicalism. Shuttling between New York and Berlin for many years, he continues to represent the forefront of the German jazz scene at the forefront with exciting ventures.

In the current project Hemisphere 4. Kapitel 2, the continuation of Ullmann's continuing project Hemisphere 4 (JHM 303), he once again builds on the jazz tradition by exploring realms of new music and free improvisation expressively and with exciting conceptions.

Ullmann's lasting impact as an improvising musician has always been the result of the fact that he - more than many of his colleagues - works as a composer of chamber music works including two string quartets and several compositions for solo wind instruments. In addition he has composed several larger works for classical orchestra, most recently his first symphony entitled “Symphonic Interweavings for Orchestra, Voice, Piano and Percussion“. In 2020 Ullmann released his 60th recording as bandleader/coleader; in 2024 his 60-minute piano cycle "Impromptus und Interationen" was also published. From the very beginning, Ullmann's plan was to release a second part of Hemisphere 4; this contains considerably more compositional elements than the previous suite. The work is always played completely live, without cuts and overdubs, and is also reproduced in exactly the same way by the ensemble live. In comparison to its predecessor, Gebhard Ullmann describes the character structures of Chapter Two as "very quiet audio films", with a large part of the improvisational sections taking place in duo with Liz Kosack.

Gebhard Ullmann has worked with Paul Bley, Han Bennink, Herb Robertson, Keith Tippett, Andrew Cyrille, Alexander von Schlippenbach, Willem Breuker and Michael Riessler, among others. For his work he received the Julius Hemphill Composition Award, the German Phono Academy Prize, the SWF Jazz Prize and in 2022 the German Jazz Prize in the woodwind category.