Karlheinz Stockhausen - Kontakte (1959)
Kontakte is the epitome of Stockhausen's pioneering "moment form," characterized by long periods of inactivity broken by sudden changes. The prepared tape used in the work consists of a variety of metallic effects, some sped up to create radically different sounds and timbres. Probably Stockhausen's most famous work, Kontakte has been performed in two versions, one with four-channel tape and another with four-channel tape with added piano and percussion. The only widely available version, released on Ecstatic Peace, was recorded in Toronto in 1978 with tape plus pianist James Tenney and percussionist William Winant.