The overall concept for a Zentrum für Kunst und Medientechnologie in Karlsruhe positioned music as integral part of it from the very beginning in 1985. The following text does not list accomplishments by discussing individual works, productions and research projects; this report describes and contextualises what happened and how it happened, it talks of people and concepts, of politics and ideas. It tries to illuminate the complex path between politics and technology, individual interests and cultural perspectives that led to and shaped ZKM. The uniqueness of ZKM is not only that it comprises museums as well as institutes, which actively produce art. The uniqneness of ZKM also lies in that music was planned as an equally important partner in the original concept, and that the Institute for Music and Acoustics still holds a major position in the institution today even though ZKM as a whole shifted towards the dominance of visual media. The focus of this text is on how the Institute for Music and Acoustics forms an integral part of ZKM as a whole while evolving its own inner direction and dynamics.