He also planned a sequel composition-studio project for the 1970 Darmstadt courses, which was to have been performed outdoors in the woods surrounding Schloss Kranichstein. It was provisionally titled "Musik im Wald" (Music in the Woods), but in the end Stockhausen abandoned the idea in favour of a series of retrospective analytical lectures . The shape of the whole was formed around the spaces in which it was performed, and the technical arrangement for the amplification of sound and the linking of microphones and speakers between the various rooms employed. While the Georg-Moller-Haus predetermined the shape of the spaces, the technical setup was designed by Stockhausen together with Ludwig Klapproth, the technical director of the Ferienkurse . The simultaneous performances in different rooms on three different floors of the Georg-Moller-Haus were synchronized by Stockhausen as different layers of a polyphonic composition. The audience could pass from one layer to another by moving from room to room, but the combined effect could only be heard over loudspeakers in the basement control room, where none of the performers were .