DAF, which stands for Dynamische Akustische Forschung (Dynamic Acoustic Research), is a free collective that first emerged from a class at the Academy of Fine Arts in Nuremberg and Munich. Its members explore contemporary and historical sound practices that exist beyond purely musical contexts. For DAF, sound is an unstable material, which allows it to be as sculptural as it is time-based. This book is a collection of previous projects as well as a composition in its own right. It was put together to encourage the appreciation of sound as an exploration of reality from various social, personal, and cultural perspectives. The reality of sound is, after all, everything that reflects and bounces off, and it is constructed and filtered by people and objects as well as by people in relation, both to each other as well as to objects. Thus, sound is not what we think it is, but what we live through and what lives through us.