One of his compositions for six vocalists is based
One of his compositions for six vocalists is based on a single B-flat ninth chord and requires the singers to emphasize overtones up to the 24th partial . He included a serialized part for a mime making prayer gestures in his Inori, and Plus-Minus was the first of his "process compositions." His work with indeterminacy includes Zyklus, a spirally-bound score that can begin on any page, and Refrain, which features circular notation. Another piece is scored for three orchestras with three conductors, and is called Gruppen. Each part of his most ambitious work opens with a "Greeting" and ends with a "Farewell." The "Farewell" for Thursday was played, at its premiere, from the rooftops of the square outside La Scala. For 10 points, identify this composer of several Klavierst?cke, the seven-part operatic cycle Licht, and the Helicopter Quartet.
One of his compositions for six vocalists is based on a single B-flat ninth chord and requires the singers to emphasize overtones up to the 24th partial .
Karlheinz Stockhausen