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Karlheinz Stockhausen's Gesang der Jünglinge (Song of the Children), composed in 1956, was one of the first works to include spatialization as an compositional element. The original version utilized five loudspeakers, positioned spatially to surround the audience. As Stockhausen describes it: "The direction and movement of the sounds in space is shaped by the musician, opening up a new dimension in musical experience."

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The photo at the left shows Stockhausen in Cologne in 1958. Courtesy Stockhausen-Verlag.

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