The music festival series holo sounds was created during the curating cycle of Sebastian Stein (2015/16). holo sounds was originally conceived as a series linking music, theory, visual arts and performance. Since 2018 it has been organised as an infrequent series in an extended environment of experimental music by Jens Fleischer (HB), Nika Breithaupt and Helena Ratka (HH), Claudia Franke and Sebastian Stein (H), Mario Michel and Mélodie Melak (B).