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.
A first version of In Freundschaft was composed on Sunday, 24 July 1977 in Aix-en-Provence as a birthday gift for Suzanne Stephens. This version was written for the clarinet, but Stockhausen immediately made a fair-copy transposition for flute, and it was this version that was first performed, one time each by two American flautists, Lucille Goeres and Marjorie Shansky, for Stephens’s birthday party in Aix on 28 July 1977. The first public performance, also of the flute version, was given by Lucille Goeres on 6 August 1977, in a concert by course participants of the Centre Sirius at the Aix Conservatory. Stockhausen reworked the composition on 27 April 1978, at which time he also made versions for oboe, trumpet, violin, and viola (Stockhausen 1978). The premiere of the version for clarinet was given by Suzanne Stephens on 30 November 1978 as part of a concert Hommage à Olivier Messiaen, in the Salle Wagram, Paris, and the version for oboe was premiered by Heinz Holliger on 6 July 1979 in a Musik des 20. Jahrhunderts concert in the large hall of Funkhaus Halberg at the Saarländische Rundfunk in Saarbrücken. At around this time, Stockhausen adapted the clarinet version for the basset horn, with extended range to low C, and this version was first performed by Suzanne Stephens at a private gathering at the composer’s house on the occasion of his fifty-first birthday on 22 August 1979. Both the clarinet and basset-horn versions are authorised for performance on bass clarinet, and the first public performance of the extended-range version was given by the Dutch bass clarinetist Harry Sparnaay on 10 January 1981 in Haarlem (Stockhausen 1989a, 136–37).
In the following years, Stockhausen adapted the work for most of the other orchestral instruments. Between 7 and 10 January 1981, in collaboration with Warren Stewart, Stockhausen made a version for cello, which Stewart premiered at the Eastman School of Music on 23 April 1981. Even before this premiere, Stockhausen had adapted it, from 16 to 19 April 1981, as a new version for violin. A version for bassoon followed the next year, composed on 19 and 20 April 1982 for Kim Walker. During rehearsals, Stockhausen came to imagine the piece being played by a teddy bear, like the one he had had as a small child, only much larger. Walker had a costume made, and gave the premiere in the Wigmore Hall in London on 10 May 1982 under the title "In Freundschaft, for a teddy bear with bassoon". A version for trombone was requested by Mark Tezak, who finalized the details with Stockhausen during rehearsals in August and September 1982. Around the same time, John Sampen requested and performed a version for soprano saxophone, though Stockhausen made further adjustments the next year with the saxophonist Hugo Read. At the request of the hornist Alejandro Govea Zappino, a version for his instrument was prepared during rehearsals on 17 November 1983, but further changes were carried out up to 11 September 1984 and the premiere was only finally given by Jens McManama, hornist with the Ensemble InterContemporain, at a concert in Baden-Baden celebrating Pierre Boulez’s 60th birthday on 31 March 1985 (Stockhausen 1989a, 137). Even a version for alto recorder came into existence, at the instigation of Geesche Geddert, first in an exchange of letters, then in rehearsal with Stockhausen on 6 April 1984 (Geddert 1985, 416; Stockhausen 1989a, 137). The published score of the cello version can also be played on double bass, and a version for tuba also exists (Stockhausen-Verlag 2010, 25). In response to a suggestion by his trumpet-player son, Markus (who had put off attempting the work for 20 years), he replaced the original trumpet version with a new one for trumpet in E♭ with a special fourth valve. Markus gave the world premiere of this new version in Kürten on 31 August 1997 (M. Stockhausen 1998, 8, 14, 20).
The four parameters of pitch, duration, dynamics, and timbre in In Freundschaft are all determined from the construction of a musical formula, the basic form of which is presented at the outset of the work (Zelinsky and Smeyers 1985, 412). This basic form consists of five segments, containing 1, 3, 2, 5, and 8 notes—therefore 19 notes in all—occupying durational units of approximately 1, 2, 3, 5, and 8 quarter-notes' duration, though the ending is altered in the introductory statement—a "reduced formula" ending with a slow oscillation between two notes a semitone apart (Zelinsky and Smeyers 1985, 413; Stockhausen 1989b, 672 and 674–75). This formula is then presented in two registrally separated and permuted alternating statements, similar to the arrangement in Stockhausen’s Mantra, so that the work may be said to be monothematic (Conen 1991, 54). Initially, the separation of the two layers is emphasized through the dynamics: the higher level is consistently pp, the lower one ff (Conen 1991, 243).
Each layer consists of five segments, and the rests separating the segments in the upper layer correspond to the lengths of the sounding segments in the lower one. Measured in sixteenth-notes (and therefore on average a quarter the lengths of the upper-layer segments), these are: 4, 7, 2, 11, and 0 (= grace note) (Conen 1991, 242; Stockhausen 1989b, 672). The segment statements are separated by a middle-register semitone trill (A to B♭ in the clarinet version), which first emerges out of a gradual acceleration of the last interval of the fifth segment in the introduction (Stockhausen 1989a, 137; Zelinsky and Smeyers 1985, 413).
After the initial presentation, the opposing characters of the two layers is gradually evened out, in a process of development over seven cyclical statements of the formula, until the two layers are merged into a single melody (Frisius 2008, 328). This is accomplished by progressively transposing the upper level downward by one semitone per cycle, and the lower level upward by the same degree. In this way, the entirely separate ranges in the first cycle (F♯5–F6 and F♯4–F5 are brought into the single octave C5–B5 in the seventh (Zelinsky and Smeyers 1985, 418).
The overall form is interrupted by two cadenzas, the first between the third and fourth cycles, the second at the point of union between the two layers, beginning near the end of the sixth cycle and leading to the seventh (Conen 1991, 251–52; Zelinsky and Smeyers 1985, 415).
- Karlheinz Stockhausen: Musik für Flöte. Kathinka Pasveer, flute. 2-CD set. Stockhausen Complete Edition CD 28A-B. Kürten: Stockhausen-Verlag, 1992.
- Karlheinz Stockhausen: In Freundschaft für Blockflöte, für Fagott, für Horn, für Kontrabass. Geesche Geddert, alto recorder. Stockhausen Complete Edition CD 101. Kürten: Stockhausen-Verlag, 2012.
- Cristian Hommel: Bach, Mozart, Huber, Stockhausen. Christian Hommel, oboe; Kay Johannsen, cembalo. Preisträger Deutscher Musikwettbewerb. CD recording. Ars Musici Primavera AMP 5005-2. Primavera HM 2067-2. Freiburg: Ars Musici, 1993.
- Stockhausen: In Freundschaft, Traum-Formel, Amour. Suzanne Stephens, clarinet & basset horn. CD recording. Deutsche Grammophon 419 378-2. Hamburg: Polydor International GmbH, 1988. Reissued on Deutsche Grammophon 423 378-2. Hamburg: Polydor International GmbH, 1988. Reissued on Stockhausen Complete Edition CD 27 (CD). Kürten: Stockhausen-Verlag, 1992.
- Clarinet in the XXth Century. Ivan Stochl, clarinet; Boris Nedeltchev, piano. CD recording. Gega GD 120 1991. Sofia: Gega, Ltd., 1992.
- 20th Century Music for Unaccompanied Clarinet. Paul Meyer, clarinet. CD recording. Denon CO-78917. [Tokyo]: Nippon Columbia Co., Ltd., 1994.
- Dal Niente. Eduard Brunner, clarinet. CD recording. ECM New Series ECM1599 453 257-2. [Germany]: ECM Records GmbH, 1997.
- Alain Damiens Clarinette. Alain Damiens, clarinet. CD recording. ADDA 581066. 1988. Reissued as: Damiens: Clarinet Solos. 06/17/2002. CD recording. Accord 472337.
Basset horn 
- Musik für Klarinette, Baßklarinette, Bassetthorn: Suzee Stephens spielt 15 Kompositionen. Stockhausen Complete Edition CD 32 A–C (3 CDs). Kürten: Stockhausen-Verlag, 1994.
Bass clarinet 
- Karlheinz Stockhausen: Bass Clarinet & Piano. Volker Hemken, bass clarinet; Steffen Schleiermacher, piano. 09/25/2007. CD recording. MDG 6131451. Detmold: Musikproduktion Dabringhaus und Grimm, 2007.
- Daniel Kientzy: Saxophones. Daniel Kientzy, saxophone. CD recording. ADDA 581047. With works by: Berio, Cacana, Mache, Scelsi, Stroe, and Vaggione.
- Arno Bornkamp: Reed My Mind: Contemporary Music for Saxophone. Arno Bomkamp, alto saxophone. CD recording. BVHaast CD 9304. Amsterdam: BVHaast, 1994.
- Outline. Giovanni Nardi, soprano saxophone. CD recording. Video Radio Classics (Italy) VR CD 000412.
- The Solitary Saxophone. Claude Delangle, saxophone. CD recording. Bis CD-640. Djursholm: Grammofon AB BIS, 1994.
- Scena. Timothy McAllister, saxophone. Mead, Lauba, Steinberg, Carter,07/25/2000 CD recording. Equilibrium EQ 32. Dexter, MI: Equilibrium, 1999.
- In Friendship. James Romain, saxophone; Kevin Class, piano. 05/27/2008 CD recording. Centaur CRC 2916. [Baton Rouge, La.]: Centaur Records, 2008.
- Saxophon. Julien Petit, saxophon. CD recording. Stockhausen Complete Edition CD 78. Kürten: Stockhausen-Verlag, 2005.
- Stockhausen: Music for Bassoon. Knut Sönstevold, bassoon; Kina Sönstevold, piano. CD recording. Nosag CD 42. [Sweden]: Nosag Records, 2000.
- Bassoon XX/Fagott XX. Rino Vernizzi, bassoon; Gianpaolo Ascolese, drum set; Gianluca Renzi, double Bass; New Music Studium, Antonio Plotino, cond. CD recording. Arts Music 47644. [Germany]: Arts Music, 2001.
- Karlheinz Stockhausen: In Freundschaft für Blockflöte, für Fagott, für Horn, für Kontrabass. Edurne Santos, bassoon. Stockhausen Complete Edition CD 101. Kürten: Stockhausen-Verlag, 2012.
- Karlheinz Stockhausen: In Freundschaft für Blockflöte, für Fagott, für Horn, für Kontrabass. Christine Chapman, horn. Stockhausen Complete Edition CD 101. Kürten: Stockhausen-Verlag, 2012.
- Markus Stockhausen Plays Karlheinz Stockhausen. Markus Stockhausen, trumpet; Niek de Groot, contrabass; Annette Meriweather, soprano. CD recording. EMI Classics 7243 5 56645 2 5. Cologne: EMI Electrola GmbH, 1998. Reissued on: Stockhausen: Aries, Halt, Pietà, In Freundschaft. Stockhausen Complete Edition 60. Also reissued on: 20th Century Classics. 2-CD set. EMI Classics 6955982. [London]: EMI Classics, 2009.
- The Solitary Trombone. Christian Lindberg, trombone. CD recording. Bis CD-388. Djursholm: Grammofon AB BIS, 1989.
- Musik für Posaune und Euphonium. Michael Svoboda, trombone and euphonium. CD recording. Stockhauen Complete Edition CD 44. Kürten: Stockhausen-Verlag, 1997.
- Ciaccona. Friedrich Gauwerky, cello. LP recording. Edition Michael F. Bauer MFB 048. [German]: Edition Michael F. Bauer, 1987.
Double bass 
- Karlheinz Stockhausen: In Freundschaft für Blockflöte, für Fagott, für Horn, für Kontrabass. Heiko Maschmann, double bass. Stockhausen Complete Edition CD 101. Kürten: Stockhausen-Verlag, 2012.
- Bitondi, Matheus Gentile. 2006. "A estruturação melódica em quatro peças contemporâneas". Nondoctoral dissertation. São Paulo: Mest, Music from Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP).
- Conen, Hermann. 1991. Formel-Komposition: Zu Karlheinz Stockhausens Musik der siebziger Jahre. Kölner Schriften zur neuen Musik 1, edited by Johannes Fritsch and Dietrich Kämper. Mainz: Schott Musik International. ISBN 3-7957-1890-2. Reprinted, as Formel-Komposition: zu Karlheinz Stockhausens Musik der 1970er Jahre. Kürten: Stockhausen-Verlag, 2009. ISBN 978-3-00-027202-8
- Decarsin, Francois. 1998. "Metamorphoses of Invention". Perspectives of New Music 36, no. 2 (Summer): 13–39.
- Faria, Richard. 2002. "In Freundschaft by Karlheinz Stockhausen". The Clarinet 29, no. 3 (June): 4–9.
- 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, Toronto: Schott Musik International. ISBN 978-3-7957-0249-6.
- Geddert, Geesche. 1985. "In Freundschaft von Karlheinz Stockhausen jetzt auch für Altblockflöte". Tibia: Magazin für Freunde alter und neuer Bläsermusik 10, no. 3:416–19.
- I, Mi-jin (이미진). 2002. "윤곽이론에 기초한 현대음악의 리듬분석 연구" [Rhythmic Analysis of Contemporary Music Based on Contour Theory]. Yeonse Eum'ag Yeongu/Yonsei Music Research 9:53–90.
- 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. 1978. "In Freundschaft für Flöte oder Klarinette oder Oboe, Trompete, Violine, Viola (1977)". In his Texte zur Musik 4: 1970–1977, edited by Christoph von Blumröder, 345. Cologne: DuMont Buchverlag. ISBN 3-7701-1078-1
- Stockhausen, Karlheinz. 1989a. "In Freundschaft (1977): Einzelausgaben für Klarinette, Flöte, Blockflöte, Oboe, Fagott, Bassetthorn oder Baßklarinette, Violine, Violoncello, Saxophon, Horn, Posaune". In his Texte zur Musik 5: 1977–1984, Komposition, edited by Christoph von Blumröder, 136–38. Cologne: DuMont Buchverlag. ISBN 3-7701-2249-6.
- Stockhausen, Karlheinz. 1989b. "Die Kunst, zu hören". Texte zur Musik 5: 1977–1984, Komposition, edited by Christoph von Blumröder, 669–98. Cologne: DuMont Buchverlag, 1989. ISBN 3-7701-2249-6. Published as an offprint, titled Die Kunst, zu hören: eine Analyse der Komposition In Freundschaft. Cologne: DuMont Buchverlag, 1989. Originally published 1987 in Musiktheorie 2, no. 3:207–30. English translation as "The Art of Listening". In Stockhausen in Den Haag: Documentatie van het Karlheinz Stockhausen Project in het Koninklijk Conservatorium te Den Haag 27 oktober tot en met 1 december 1982, edited by Frits Weiland, 35–37. The Hague: Koninklijk Conservatorium1982. ISBN 90-07-41376-0. Expanded English version as "The Art, to Listen [sic]—A Musical Analysis of the Composition In Friendship", translated by John McGuire, edited by Suzanne Stephens. Kürten: Stockhausen-Verlag, 2002.
- Stockhausen, Markus. 1998. "Markus Stockhausen spielt Karlheinz Stockhausen: Meinem Vater zum 70. Geburtstag von Herzen gewidmet". Liner notes for Markus Stockhausen Plays Karlheinz Stockhausen, 7–11; English translation by Clive Williams, 13–17; French translation by Christian Hinzelin, 19–24. EMI Classics 7243 5 56645 2 5. Cologne: EMI Electrola GmbH.
- Stockhausen-Verlag. 2010. "Stockhausen: August 22nd 1928–December 5th 2007 ", English edition of brochure with official worklist and list of CDs. Kürten: Stockhausen-Verlag.
- Zelinsky, Beate, and David Smeyers. 1985. "Karlheinz Stockhausen In Freundschaft: Eine Herausforderung für Interpreten und Publikum". Tibia: Magazin für Freunde alter und neuer Bläsermusik 10, no. 3:412–16.