The COB is a large orchestra, with strings, horns and rhythm section, founded in autumn 2010 by composer & conductor Hazel Leach. The members of the orchestra are not only improvising instrumentalists, but are also the composers. There is no fixed line-up: the composers can select instruments from the pool, to develop a brand-new and innovative orchestral repertoire with stylistic influences ranging from classical to jazz and from folk to free…. the music written for this band has no exclusion zones.
Since the first concert in January the COB has become an established part of the Berlin jazz-scene, with regular concerts in the Kunstfabrik Schlot and the production of 5 CDs and an audiobook.

The latest orchestral CD is ‘Telling Stories’, to be released in April 2026 (Jazzhausmusik 328).