Edition ZKM is dedicated to productions from the ZKM-Institute for Music and Acoustics. The institute is part of the Center for Art and Media Karlsruhe, Germany, (ZKM) which also includes the Museum for Contemporary Art, the Media Museum, a Media Library and the Institute for Visual Media. Guest artists from all over the world are invited to work in the music studios to realize specific projects. The projects, ranging from digital synthesis and algorithmic composition to the integration of live electronics, from radio art to sound installation, encompass a broad spectrum of that locus where digital technology stimulates musical fantasy. This radio-play (in German) features Bernhard Wicki as protagonist searching the European capitals of Berlin, Paris, London, Vienna and Lisbon for "the stone". His obsession with the stone is driven by his deceptive hope that he could predict the journey of the stone. - The author and composer Martin Daske realized his work in co-production with German radio-stations in ZKM's music studios. Bernhard Wicki: narrator / Erwin Schastok, Ortwin Speer, Brita Sommer, Elisabetta Niccolini, Roberto Cornea da Costa, Anna Carewe, Gerhard König, Marc Altmann: speakers.