reflects one of the many possible audio walks. As the app adapts the music to the position, direction of movement and walking speed of the flaneur, no opera walk will be like the one before. Musically, „Vergehen“ combines the classical voice of Sarah Aristidou with a hybrid of acoustic and processed cello played by Anja Lechner, analogue techno electronics and digital sound art by Mathis Nitschke. At times bringing to mind the drive of popular electric cello ensembles, then paying homage to the heritage of musique concrète, then again delivering allusions to jazz and world music, composer Mathis Nitschke doesn’t tie himself down to one genre. Using special miking techniques and the latest binaural filters for the production lead to a 3D audio experience that is optimized for headphones, yet fully compatible to speakers. Soprano: Sarah Aristidou. Narrators: Sarah Aristidou, Mathis Nitschke, Google Android. Cello: Anja Lechner. Concept, composition and programming: Mathis Nitschke. Text: Mathis Nitschke, freely using motives and paraphrases out of Douglas Trumbull’s movie “Brainstorm”, Benjamin Stein’s novel “Replay” (C. Beck) and most of all Judith N. Klein’s essay “Rückkehr nach Lindeira” (Neues Literaturkontor). Translation: Alex Schmidt. Additional samples out of productions with Mathis Mayr (cello) und Gabriel Hahn (drums). Made possible by the city of Munich’s “Projektstipendium Junge Kunst / Neue Medien für Musik 2015”.