The Skywalker listens to the sounds floating high above us. He is a little blimp filled with helium, equipped with two ears with whom you can go for a walk  and experience a vertical sonic landscape. As you walk with the Skywalker you can hear the ground ambience from a higher perspective.  It  simultaneously creates an alienated feeling as well as a richer sensory experience.

The sounds of the walks are recorded at the same time :