Fo[u]r Alto is the quadrupling of the alto saxophone as a unified body of sound. Since the ensemble was founded in 2008, the four Berlin saxophonists Frank Gratkowski, Christian Weidner, Leonhard Huhn (until 2018 Benjamin Weidekamp) and Florian Bergmann have found an unmistakable sound language characterised by artistic uncompromisingness and continuous musical research. In autumn 2012, they released their first CD "4 compositions by Frank Gratkowski" on the English label Leo Records. Now follows the second release on impakt Records "2 compositions by Frank Gratkowski": Spectral swarm music on four alto saxophones.