oboe, clarinet, bassoon, trumpet, trombone, tuba, and viola, Nr. 90 (2007) Eleventh Hour: Treue (Fidelity), for E-flat clarinet, basset horn, and bass clarinet, Nr. 91 (2007) Twelfth Hour: Erwachen (Awakening), for soprano saxophone, trumpet, and cello, Nr. 92 (2007) Thirteenth Hour: Cosmic Pulses, electronic music, Nr. 93 (2006–07) Fourteenth Hour: Havona, for bass voice and electronic music, Nr. 94 (2007) Fifteenth Hour: Orvonton, for baritone and electronic music, Nr. 95 (2007) Sixteenth Hour: Uversa, for basset-horn and electronic music, Nr. 96 (2007) Seventeenth Hour: Nebadon, for horn and electronic music, Nr. 97 (2007) Eighteenth Hour: Jerusem, for tenor and electronic music, Nr. 98 (2007) Nineteenth Hour: Urantia, for soprano and electronic music, Nr. 99 (2007) Twentieth Hour: Edentia, for soprano saxophone and electronic music, Nr. 100 (2007) Twenty-first Hour: Paradies (Paradise), for flute and electronic music, Nr. 101 (2007) Klavierstücke Klavierstücke I–IV, Nr. 2 (1952) Klavierstücke V–X, Nr. 4 (1954–55/61) Klavierstück XI, Nr. 7 (1956) Klavierstück XII, ex Nr. 49¾ (1979/83) Klavierstück XIII, Nr. 51½ (1981) Klavierstück XIV, ex Nr. 57⅔ (1984) Synthi-Fou (Klavierstück XV), ex Nr. 61⅔ Klavierstück XVI, Nr. 63½ (1995) Klavierstück XVII, 7½ ex Nr. 64 (1994/99) Klavierstück XVIII, Nr. 73⅔ (2004) Klavierstück XIX, Nr. 80 (2001/2003) Kontakte ("Contacts"), for electronic sounds, Nr. 12 (1958–60); Kontakte, for electronic sounds, piano, and percussion, Nr. 12½ (1958–60); Originale, musical theatre with Kontakte, Nr. 12⅔ (1961) Kontra-Punkte ("Counter-Points"), for 10 instruments, Nr. 1 (1952–53) Kreuzspiel, for oboe, bass clarinet, piano, and 3 percussionists, Nr. 1/7 (1951) Kurzwellen, for 6 players with live electronics, plus sound director, Nr. 25 (1968) Licht, Nr. 47–80 (1977–2003) Licht-Ruf, Nr. 67 (1995) Litanei 97, Nr. 74 (1997) Mantra, for 2 pianists (with wood blocks and antique cymbals) and electronics, Nr. 32 (1970) Mikrophonie I, for tamtam (2 players), 2 microphones, 2 filters with potentiometers, and 4 pair of loudspeakers, Nr. 15 (1964) Mikrophonie II, for 12 voices, Hammond organ (or synthesizer), 4 ring modulators, and tape, Nr. 17 (1965) Mixtur, for orchestra, 4 sinewave generators, and 4 ring-modulators, Nr. 16 (1964) Musik im Bauch, for 6 percussionists and music boxes, Nr. 41 (1975) Momente, for soprano solo, 4 choirs, and 13 instrumentalists, Nr. 13 (1962–64/69) Oktophonie (1990/91) electronic music of Tuesday from Light Plus-Minus, 2 x 7 pages for realization, Nr. 14 (1963) Pole, for 2 players or singers with 2 short-wave radios, Nr. 30 (1969–70) Prozession, for 6 players with live electronics, Nr. 23