Stop (Stockhausen)

Stop is a work of about 20 minutes duration, written in a single session at the blackboard in 1965 during a composition seminar at the Cologne Courses for New Music 1964–65, in response to a request from a student for a demonstration of the process of creating a work, including "precise details". The instrumentation is flexible, and an organic process binding the whole together must also be developed from the basic score to make a version before it can be performed. The title stems from the fact that, from time to time, noises or coloured silences stop these processes of unfolding of groups of pitches (Stockhausen 1971, 72; Kurtz 1992, 146). In addition to the original score, two performing versions made by the composer have been published: a "Paris Version" for nineteen instruments, Nr. 18½ (1969), and Stop und Start (Stop and Start) for six instrumental groups (twelve performers) (2001) Nr. 18⅔. The altered title of the 2001 version simply reflects the fact that a new sound group starts up after each interruption (Stockhausen 2002, 9 and 36). The "Paris Version" was that of the world premiere, given on 2 June 1969 under the baton of Diego Masson in the Théâtre National Populaire, Palais de Chaillot, as part of the fifth of a series of seven concerts of Stockhausen's works (Stockhausen 1971, 72, 75–76). A "London Version" was made in 1973. Although this version was performed and recorded, it is close to the Paris version (Stockhausen 1978, 77) and has neither been published nor given a separate number in the composer's catalog.

Stop consists of forty-two sections, each characterised by a different configuration of pitches, or by noises (Stockhausen 1971, 73). The durations of these groups are related by proportions of Fibonacci numbers, while their pitches are based on a twelve-note "central chord", within which a succession of nine single tones progresses gradually downward, alternating with a rising progression of six bichords that suddenly falls into the bass register for an ending, seventh bichord. Interspersed amongst these single and double pitches there are six trichords in a falling-rising pattern, four tetrachords in a jagged down-up-down shape, and two widely separated six-note chords in groups 9 and 41 (Frisius 2008, 174). According to a different analysis, there are twelve central tones that gradually fall (with one deviation in the middle) over the course of the work (Stockhausen 1978, 77):

Near the end, a concealed children's song appears "like wind", in agitated, dissonant tremolos over a solemn bass line (Stockhausen 2002, 9 and 36). This tonal melody, introduced as a simulated short-wave radio signal, appears to be intended to provoke a strong emotional reaction (Maconie 2005, 262).

Although the score specifies that the six groups be placed "as far apart from one another as possible", the version conducted by the composer in London on 9 March 1973 did not differentiate them spatially (Griffiths 1973).

• Stockhausen: Stop; Ylem. London Sinfonietta, Karlheinz Stockhausen (cond.). LP recording. DG DG 2530 442. Hamburg: Deutsche Grammophon, 1974. Stop reissued on CD, Stockhausen: Kontra-Punkte; Zeitmaße; Stop; Adieu. Stockhausen Complete Edition CD 4. Kürten: Stockhausen-Verlag, 2002.
• Stockhausen: Europa-Gruss; Stop und Start; Two Couples; Elektronische und Konkrete Musik zu Komet; Licht-Ruf. Stockhausen Complete Edition CD 64. Kürten: Stockhausen-Verlag, 2002.

• Frisius, Rudolf. 2008. Karlheinz Stockhausen II: Die Werke 1950–1977; Gespräch mit Karlheinz Stockhausen, "Es geht aufwärts". Mainz, London, Berlin, Madrid, New York, Paris, Prague, Tokyo, and Toronto: Schott Musik International. ISBN 978-3-7957-0249-6.
• Griffiths, Paul. 1973. "Music in London: New Music: Stockhausen". Musical Times 114, no. 1563 (May): 503.
• Kelsall, John. 1975. "Compositional Techniques in the Music of Stockhausen (1951–1970)". PhD diss. Glasgow: University of Glasgow.
• Kurtz, Michael. 1992. Stockhausen: A Biography, translated by Richard Toop. London and Boston: Faber and Faber. ISBN 0-571-14323-7 (cloth) ISBN 0-571-17146-X (pbk).
• Maconie, Robin. 2005. Other Planets: The Music of Karlheinz Stockhausen. Lanham, Maryland; Toronto; Oxford: The Scarecrow Press, Inc. ISBN 0-8108-5356-6.
• Stockhausen, Karlheinz. 1971. "Stop für Orchester (1965)". In his Texte zur Musik 3, edited by Dieter Schnebel, 72–74. DuMont Dokumente. Cologne: DuMont Buchverlag. ISBN 3-7701-0493-5.
• Stockhausen, Karlheinz. 1978. "Stop für Orchester (1965)". In his Texte zur Musik 4, edited by Christoph von Blumröder, 76–77. DuMont Dokumente. Cologne: DuMont Buchverlag. ISBN 3-7701-1078-1.
• Stockhausen, Karlheinz. 2002. "Stop and Start (2001) for 6 Instrumental Groups". In Programm zu den Interpretations- und Kompositionskursen und Konzerten der Musik von Stockhausen 27. Juli bis 4. August 2002 in Kürten / Programme for the Interpretation and Composition Courses and Concerts of the Music of Stockhausen July 27th to August 4th 2002 in Kuerten, 8–9 (German), 35–36 (English). Kürten: Stockhausen-Stiftung.

• Maconie, Robin. 2016. Other Planets: The Complete Works of Karlheinz Stockhausen 1950–2007, updated edition. Lanham, MD, and London: Rowman & Littlefield. ISBN 978-1-4422-7267-5.
• Rigoni, Michel. 1998. Stockhausen: ... un vaisseau lancé vers le ciel, second edition, revised, corrected, and enlarged. Lillebonne: Millénaire III Editions. ISBN 2-911906-02-0.