Karlheinz Stockhausen - Gesang Der Jünglinge ("Song of the Youths")

Gesang der Jünglinge ("Song of the Youths") is electronic music work by Karlheinz Stockhausen realized in 1955–56 at the Westdeutscher Rundfunk studio in Cologne, originally in five-channel sound, which was later reduced to just four channels (mixed to monaural and finally to stereo for commercial recording release). Three basic types of material used: 1) electronically generated sine tones 2) electronically generated pulses (clicks) 3) filtered white noise To these is added the recorded soprano voice of a 12-year-old boy, which incorporates elements of all three types.