City of Sounds and Silence (C.O.S.A.S) is a soundscape of the green city. Is electric mobility making the city silent again, so we can hear birds singing again? Or should electric vehicles play classical music for safety? Idea created by Amsterdam-based music theatre collective Sun City, City of Sounds and Silence is an interactive Dolby Surround radio play with the length of a pop song. C.O.S.A.S takes you on a walk through the city. You will not hear anything about flying cars or office buildings made entirely out of glass. Instead, the installation leaves the details to the imagination of the visitor. C.O.S.A.S. strives towards an emotional experience of the post-fossil city, where sound plays an important role in really involving the visitor in the post-fossil city. Through stimulation of other senses, different parts of the city are highlighted and the installation can be 're-lived' time and time again. Listen and watch Car engines have disappeared; the city grows silent. Sit down, put helmet and headphones on and shut your eyes. Immerse yourself in a three dimensional soundscape, and choose your own way. Experience the city of the future: your ears will guide you.