In the 19th episode of the series “Lautstark, der Talk rund ums Hören” of the German Cochlear Implant Society (Deutsche Cochlea Implantat Gesellschaft e.V.), Prof. Dr. Tobias Moser, speaker of the MBExC, explains vividly how optogenetics can restore lost hearing function. The round table is simultaneously translated into written text. A lecture is followed by an in-depth discussion and Q&A session.