How does music morph when it crosses listening traditions? Based on an album by Ensemble Extrakte, 4 iterative live concerts and their sound and video recordings are interwoven step by step. Following an always identical instruction score by Bhagwati, the musicians comment on, accompany, and imitate the preceding concert - before they themselves become the inspiration for the following one: as acoustic memories in the headphones of their colleagues, and as fragments and samples in the sound of the Gebr. Teichmann. The audience can hear and see how new music is created: designed but unpredictable, guided yet involuntary, rich in tensions - and in unexpected beauty. Between the concerts, renowned historian of science Hans-Jörg Rheinberger will reflect on such “iterative listening as artistic research”.