a quartet with superb and well famous musicians – free improv.
- Anna Kaluza, alto saxophonist, studied in Cologne, Vienna and London, where began prestigious collaborations; since 2009 has been in Berlin where, in 2010, she established the Berlin Improvisers Orchestra – BerIO; member of various groups, she has several recordings to her credit.
- Willi Kellers, drummer, improviser, composer, based in Berlin, is one of the well-known names in European radical music. On his active numerous collaborations and recordings since the 80s, with internationally renowned musicians. He is permanent member of the BerIO.
- Emilio Gordoa, Mexican sound artist, composer, percussionist, vibraphonist, based in Berlin since 2012, where joined the new free music scene; he played prestigious recordings and important collaborations in Europe and America.
- Tommaso Vespo, Italian jazz pianist, active in the Italian and European free music scene; member of various groups and orchestras with which he has played in festivals in NY, London, Vienna and Italy; he has to his credit recordings as leader and member; since 2013 he has been member of BerIO.