Stop is a composition for orchestra (divided into six groups) by Karlheinz Stockhausen, work-number 18 in the composer’s catalogue of works, where two performing realisations are also found as Nr. 18½ and Nr. 18⅔.
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.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. 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. A "London Version" was made in 1973. Although this version was performed and recorded, it is close to the Paris version 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.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. 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:
Near the end, a concealed children's song appears "like wind", in agitated, dissonant tremolos over a solemn bass line.This tonal melody, introduced as a simulated short-wave radio signal, appears to be intended to provoke a strong emotional reaction.
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.
The instrumentation in this version is flexible, but the following scoring is suggested by way of example:
The instrumentation is based on the Paris version:
Although the details of the scoring are more exactly worked out in this version, it is also possible to substitute instruments, or even to increase the numbers, so long as the balance among the groups is maintained.
In addition to the performers and a conductor, both versions are electronically amplified, requiring microphones, loudspeakers, and a mixing desk operated by a sound director.
Kontra-Punkte is a composition for ten instruments by Karlheinz Stockhausen which resolves contrasts among six instrumental timbres, as well as extremes of note values and dynamic levels, into a homogeneous ending texture. Stockhausen described it: "Counter-Points: a series of the most concealed and also the most conspicuous transformations and renewals—with no predictable end. The same thing is never heard twice. Yet there is a distinct feeling of never falling out of an unmistakable construction of the utmost homogeneity. An underlying force that holds things together—related proportions: a structure. Not the same Gestalten in a changing light. But rather this: various Gestalten in the same light, that permeates everything".
Tierkreis (1974–75) is a musical composition by the German composer Karlheinz Stockhausen. The title is the German word for Zodiac, and the composition consists of twelve melodies, each representing one sign of the zodiac.
Kontakte ("Contacts") is an electronic music work by Karlheinz Stockhausen, realized in 1958–60 at the Westdeutscher Rundfunk (WDR) electronic-music studio in Cologne with the assistance of Gottfried Michael Koenig. The score is Nr. 12 in the composer's catalogue of works, and is dedicated to Otto Tomek.
Sirius: eight-channel electronic music and trumpet, soprano, bass clarinet, and bass is a music-theatre composition by Karlheinz Stockhausen, composed between 1975 and 1977. It is Nr. 43 in the composer's catalogue of works, and lasts 96 minutes in performance.
Klang —Die 24 Stunden des Tages is a cycle of compositions by Karlheinz Stockhausen, on which he worked from 2004 until his death in 2007. It was intended to consist of 24 chamber-music compositions, each representing one hour of the day, with a different colour systematically assigned to every hour. The cycle was unfinished when the composer died, so that the last three "hours" are lacking. The 21 completed pieces include solos, duos, trios, a septet, and Stockhausen's last entirely electronic composition, Cosmic Pulses. The fourth composition is a theatre piece for a solo percussionist, and there are also two auxiliary compositions which are not part of the main cycle. The completed works bear the work (opus) numbers 81–101.
In Freundschaft is a composition by Karlheinz Stockhausen, number 46 in his catalogue of works, which is playable on a wide variety of solo instruments. It was first performed on a clarinet on 28 July 1977.
Carré (Square) for four orchestras and four choirs (1959–60) is a composition by the German composer Karlheinz Stockhausen, and is Work Number 10 in the composer's catalog of works.
Jubiläum (Jubilee) is an orchestral composition by Karlheinz Stockhausen, work-number 45 in the composer's catalogue of works.
Adieufür Wolfgang Sebastian Meyer is a composition for wind quintet by Karlheinz Stockhausen composed in 1966. It is Number 21 in the composer's catalog of works, and the second of Stockhausen's three wind quintets.
Mittwoch aus Licht is an opera by Karlheinz Stockhausen in a greeting, four scenes, and a farewell. It was the sixth of seven to be composed for the opera cycle Licht: die sieben Tage der Woche, and the last to be staged. It was written between 1995 and 1997, and first staged in 2012.
Zeitmaße is a chamber-music work for five woodwinds composed in 1955–1956 by German composer Karlheinz Stockhausen; it is Number 5 in the composer's catalog. It is the first of three wind quintets written by Stockhausen, followed by Adieu für Wolfgang Sebastian Meyer (1966) and the Rotary Wind Quintet (1997), but is scored with cor anglais instead of the usual French horn of the standard quintet. Its title refers to the different ways that musical time is treated in the composition.
Atmen gibt das Leben, is a choral opera with orchestra by Karlheinz Stockhausen, written in 1974 and expanded in 1976–77. It is Number 39 in the catalogue of the composer's works, and lasts about 50 minutes in performance.
Punkte (Points) is an orchestral composition by Karlheinz Stockhausen, given the work number ½ in his catalogue of works.
Formel (Formula) is a composition for chamber orchestra by Karlheinz Stockhausen, written while he was still a student in 1951. It is given the number 1⁄6 in his catalog of works, indicating that it is amongst the pieces preceding the composition he recognised as his first mature work, Nr. 1 Kontra-Punkte.
Harlekin (Harlequin) is a composition for unaccompanied clarinet by Karlheinz Stockhausen, named for the commedia dell'arte character Harlequin. It was composed in 1975 and is Number 42 in his catalogue of works. A shorter, derived work called Der kleine Harlekin is Number 42½.
Sternklang, is "park music for five groups" composed in 1971 by Karlheinz Stockhausen, and bears the work number 34 in his catalogue of compositions. The score is dedicated to Mary Bauermeister, and a performance of the work lasts from two-and-a-half to three hours.
The Dr K–Sextett is a short, occasional composition for six instrumentalists, written in 1969 by Karlheinz Stockhausen and given the number 28 in his catalogue of works.
Solo for a melody instrument with feedback is a work for a soloist with live electronics composed in 1965–66 by Karlheinz Stockhausen. It is Nr. 19 in his catalogue of works. Performance duration can vary from 10½ to 19 minutes.
Drei Lieder, for alto voice and chamber orchestra, is a song cycle by Karlheinz Stockhausen, written while he was still a conservatory student in 1950. In the composer's catalogue of works, it bears the number 1/10.
Europa-Gruss is a composition by Karlheinz Stockhausen for wind ensemble with optional synthesizers, and is assigned Number 72 in the composer's catalogue of works. It has a duration of about twelve-and-a-half minutes.