Fantasie (1962-1963)
for organ
Duration: 8' 00"

Doppelrohrblatt-Trio (1963)
for oboe, English horn and bassoon
Duration: 10' 00"

Kammermusik (1964)
for flute, clarinet and string quartet
Duration: 12' 00"

Gelöstes Haar (1967)
Cantata
for alto and string quartet
Texts: Toyotama Tsuno (Manfred Hausmann)
Duration: 12' 00"

Kammermusik (1966-1968)
for oboe, viola and harpsichord
Duration: 13' 00"

Metamorphosen (1969)
for wind quintet
Duration: 12' 00"

Gravitation (1969-1970)
Two quintet movements
for clarinet, bassoon, violin, violoncello and harp
Duration: 15' 00"

Abraxas (1970-1971)
Trio
for flute, violoncello and piano
Duration: 12' 00"

Notturno (1969-1971)
for string orchestra
The names of the movements: ‘Invocazione’, ‘InterMezzo’, ‘Reazione’ indicate the compositional ideas. The string orchestra is transparent and often used in a chamber musical fashion.
Duration: 14' 00"

Quattre Moments Musicaux (1971)
for piano
Duration: 7' 00"

Gitanjali (1971-1972)
Cantata
for mixed choir and organ
Texts: Rabindranath Tagore (G.M. Muncker, A. Haas)
Duration: 14' 00"

Zwei Szenen (1973-1974)
for large orchestra (pic.2.2.ca.2.bcl.2.cbn/4.3.3.1/3perc/hp.pf(cel)/str)
Duration: 15' 00"

Sieben Miniaturen (1974)
for transverse flute and harpsichord
The rigorous tone of the harpsichord and the modulatory tonal capacity of the flute were the starting points for this sound game. The individual passages proceed sometimes with and sometimes against each other.
Duration: 8' 00"

Konzert (1974-1975)
for string orchestra (min.:10.4.3.1)
Duration: 16' 00"

Tönungen (1976)
Nonet
for flute, clarinet, bassoon, horn, string quartet and double-bass
Duration: 11' 00"

Anrufungen (1976-1977)
for clarinet and organ
Invocations of a higher entity and the invocations of the partner. Whereas the invocation of the co-player produces musical reactions, the evocation of a Godly power happens in another dimension; it remains abstract and can only be experienced subjectively.
Duration: 8' 00"

Esquisses (1976-1977)
for violin solo
Duration: 6' 00"

Festmusik (1976-1977)
for two trumpets, two trombones and percussion

Legende (1977)
Trio
for flute, clarinet and piano
Duration: 12' 00"

Bellica Pax (1978)
for mixed a-cappella choir
Duration: 6' 00"

Vor- und Nachspiel (1978-1979)
for organ
Duration: 7' 00"

musica riservata (1979)
for string sextet
For all who want to get out of silence to listen into silence.
Duration: 11' 00"

Alkezir (1981)
Music
for orchestra (2(2pic).2(2ca).2(2bcl).2/4.2.1.0/1perc/hp/str)
A colourful, contrasting orchestral piece in a single movement with a rich associational content which is hinted at in the ambiguous title.
Duration: 14' 00"

Skizzen (1981)
for guitar
Duration: 5' 00"

Suono del Ceresio (1984)
for large orchestra (pic.2.2(2ca).2(2Ebcl).bcl.2.cbn/4.3.2.0/3perc/hp/str)
The people of Tessin call their southern most situated lake ’Il Ceresio’, the Celtic word ‘Keresios’ (Cernunnos) means ‘the horned’ and characterises the fantastically formed see, hill and mountain landscape “…a more sentimental impression than painting….”
Duration: 13' 00"

Pulsationen (1984)
for piano
Duration: 6' 00"

Fadensonnen (1984)
for string trio
Based on a poem by Paul Celan: “above the grey-black wilderness.
A tree-high thought tunes in to light's pitch: there are still songs to be sung on the other side of mankind.” (Paul Celan, Tr. Michael Hamburger)

Duration: 15' 00"

Toccata (mi-h f-re) (1984-1985)
for organ
Duration: 7' 00"

Sequenz zu "Missa in festo Pentecostes" (1985)
for Soprano, clarinet, viola and organ
Texts: Bibel / Liturgie
Part of a joint composition: Proprium part of the Whitsunday mass by H. Holliger, H.U. Lehmann, J. Haselbach, P. Wettstein, G. Bennett and J. Wildberger.
Duration: 9' 00"

Aphoriphone (1982-1986)
for twelve solo strings (4.3.2.2.1) and Clown ad lib
This work is broken down into twelve pieces in four groups:
Evolution - Phantom I - Phantom II
Aufgang - Tangran - Evolution
Fata morgana - Charade I - Charade II
Aufforderung... - Vision
A scenic version was developed in 1986 in close cooperation with Dimitri. A version with any other clown must be adapted in respect to the personality of that clown.

Duration: 16' 00"

Sieben Bilder aus dem Alten Buch (1986)
for piano
In cooperation with the painter Elisabeth Wettstein-Wille.
Duration: 8' 00"

Sehnsucht (1986)
Three songs
for bass-baritone and piano
Texts: Katharina Sallenbach
Based on poems by Katharina Sallenbach.
Duration: 11' 00"

Musica concertante (1986)
for oboe, violin, harpsichord and strings
As a counterpart to Bach's double concerto for oboe and violin. This piece stems from a commission by a good amateur orchestra. A colourful single-movement concerto grosso stamped with aleatoric and firmly fixed sections.
Duration: 14' 00"

Quintatön (1986)
for piano
For ‘CH-Piano’ published by Nepomuk publishers.

Acht nostalgische madrigaletti (1986)
for a-cappella choir
Texts: Mascha Kaléko
Duration: 9' 00"

Air dans l'aube (1987)
for flute
Duration: 6' 00"

Janus (1987)
for string quartet
This work lives from a sonority rising from an environment of whispered tremoli and the slightest of tonal movements. Ascending to multi coloured sotto-voce effects and dialogues spoken under breath eventually falling back to the soft vibrations of the beginning. It is signed over to Janus, and so it develops around a short intermezzo, two strings whose affinity is audible but who have absolutely separate lineaments; where it comes to refined sound effects in Face I, Face II departs into melodic developments and contrapuntal associations…(NZZ)
Duration: 14' 00"

CHF: 34.00

Starowy (1987)
Trio
for clarinet, altosaxophone and piano
Duration: 11' 00"

Skizzen für Flöte und Duettino für Flöte und Gitarre (1988)
Supplement to the sketches for guitar (1981).
Duration: 5' 00"

Canto trasognato (1988)
for violoncello and piano
Duration: 12' 00"

Elegy (1988)
Cantata
for male and female voices, wind ensemble and staff music instrument (SATB-each min.4)/2fl(pic:afl).ob.ca.cl.bcl.bn/hn.tpt.tbn/1perc)
“Pictures full of poetic beauty emerge here, rooted in the original experience of the human condition. Fear and lust, cruelty and love (referring in its multi faceted ways to the process of dying) become intimately associated with words in sound and in music.”
Duration: 15' 00"

Concerto grosso (1989)
for female dancer, violinist and ensemble (fl(afl).cl/vc/pf/perc)
Duration: 15' 00"

Arkadische Spielereien (1989)
for panpipes and keyboard instrument
Duration: 6' 00"

Sieben Märchenbilder (1989)
for flute, viola and guitar
Duration: 14' 00"

Capriccio (re-fa + es-c-h) (1990)
for flute (or piccolo) and double-bass
Duration: 4' 00"

Puzzle-Duo (1990)
for two violins
For ‘CH-VIolino’ published by Nepomuk publishers.
Duration: 3' 00"-5' 00"

Viriditas (1990)
A play on the subject of the past and future of our word
for instrumental ensemble, voices (2S1A1T2B) and moving players (1.1.1.1/1.1.1.0/2perc/1.1.1.2.1)
This two-part mystery play was written as a commission from the Swiss Confederation for its 700th anniversary. Music and movement are intertwined, the instrumentalists are implicated in the visual handling. The texts are derived from various sources and compiled by the composer.

Concerto violinissimo (1991-1992)
for violin and orchestra (2(2pic).2.2(2bcl).2/2.2.1.0/2perc/str)
“….a fantasy full discourse between the pre-existing and the powerful tradition of the virtuoso concert. It centralises the soloist, a soloist who multiplies and finds himself in partnership with five subsidiary soloists who, from various parts of the concert hall, offer support. Even the orchestra is not the collective against which the soloist stands out - it presents itself much more as a group of individuals who act, in certain parts, even independent of the conductor….”
(NZZ, 19.3.93)

Duration: 21' 00"

Une Liaison (1992)
Duo
for clarinet in B and piano
‘Annäherungen’ and ’ Spiele’ are the names of these interconnected parts in which the gesticulatory actions and movements of the performers are important.
Duration: 12' 00"

Rhapsodie (1992)
for wind orchestra (pic.2fl.2ob.ca.Ebcl.9Bbcl.bcl.2asx.tsx.barsx.2bn.cbn/4hn.3tpt.3tbn.euph.2tba/4perc)
An attempt to produce a musicianly, joyful to play wind orchestral work using new playing techniques and unusual tone combinations.
Duration: 10' 00"

Seifenblasen (1993)
A play
for three musicians with voices, piano and staff instruments
Texts: Silvia Gillardon
A theatre like scenic presentation with musical and textual supplementation.
Duration: 13' 00"

Kaleidos (1993)
for sixteen string instruments and percussion (9.3.3.1/2perc)
Sixteen solo strings are separated into chamber music groups and arranged around the percussion ensemble. From a light relaxed transparent sound surface and rhythmically pulsating figures, there develops chordal and melodic but also harmonic coloured structures which, like coloured glass splinters in a kaleidoscope, continually produce new combinations. Single soloists and small formations are set against each other resulting in an interplay between effectively fixed and improvised segments: tensions begin to mount leading to discharges; relationships develop from contacts which then lead to consensus or dissent.
Duration: 13' 00"

Un giro immortale (1994)
Death dance 1995
for baritone, m and f orators, choir, clarinet (also piccolo, clarinet in Eb, bass clarinet), three violins, viola, two violoncelli, four-handed piano, two percussion and pantomime (ad libitum)
Texts: Dante Alighieri, Giuseppe Ungaretti
Scenic or concertante performance with demanding solo parts (baritone and clarinet), but simple choir and instrumental parts.
Duration: 20' 00"

FÜNF PLUS DREI (1994-1995)
Octet
for clarinet, horn, bassoon, two violins, viola, violoncello and double-bass
Five centrally placed string instruments are combined with three decentralised wind instruments. The numbers 5 and 3 also stand for the fifth and third intervals which constitute the characteristic cell of the piece. In a wider sense, rhythmic forms and formal organisation are similarly derived from the 5:3 relationship.
Duration: 15' 00"

RITORNELLI (1995)
for small orchestra (1(pic).1.1.1/1.1.1.1/1-2perc/pf/str)
Part of the feature-length project (KREUZENDE WEGE), of the Zurich ‘Komponistensekretariat’. The motives came from composer colleagues Werner Bärtschi, Ulrich Gasser, Max Eugen Keller and Martin Sigrist (at least one motive from an earlier piece, one especially "invented" for this project, and one which is "borrowed" from an especially appreciated contemporary composer), forming the basic material that gives the piece its character.
Duration: 15' 00"

Nachtstück (1996)
for clarinet in B and piano
For CH-KLARINETTE of Nepomuk publishers.
Duration: 4' 00"

(T)raummusik (1996)
for three clarinets and three brass instruments (2cl-b.bcl/hn/tpt.tbn)
The three clarinettists are positioned on the concert podium; the three brass players are decentralised to the side and to the back of the concert room. The segments are to be played partly in strict coordination and partly in a looser coordination.
Duration: 10' 00"

Begegnung (1997)
from/for violoncello and large orchestra (2 (pic).2(ca).2(bcl).2(cbn)/4.3.3.1/str)
Convergence of a sophisticated individuum with the brutal masses, a combination of a virtuoso solo part and technically simple orchestral parts.
Duration: 9' 00"

Das Narrenspiel (1997)
for violin and piano
Thirteen tarot cards laid on 06.11.1997.
Duration: 14' 00"

Blaue Stunde (1997-1998)
for 21 solo strings (6.5.4.4.2)
'BLAUE STUNDE' (the blue hour) a time of dawn / twilight, the margin between night and day, day and night. A moment of potential metamorphosis, which can alter existential orientation and lead to increased awareness and intensified perception.
Duration: 12' 00"

eine e-musik (1998)
Three album leaves
for flute and harpsichord (alto flute)
Duration: 6' 00"

Rotondo (1999-1999)
for nonet (oboe, bassoon, trumpet, trombone, viola, double-bass, accordion, piano and percussion)
A collaboration between members of the 'Komponistensekretariats Zürich' (Werner Bärtschi, Ulrich Gasser, Max Eugen Keller, Martin Sigrist und Peter Wettstein): The score is sent back and forth between the five composers, each fills in a 50-second section before sending it on to the next.
Duration: 50' 00"
Manuscript

CHF: 122.00

Hesli-Musik (1999)
for five clarinets and strings
Simple classical instrumental music from 'Von Kissen und Küssen in Chüesenacht'.
Duration: 5' 00"

Alla Polacca (1999)
for violin solo
Virtuoso bravura piece from 'Von Kissen und Küssen in Chüesenacht'.
Duration: 3' 00"

Von Kissen und Küssen in Chüesenacht (1999)
for four soloists, four choirs, two wind, clarinet ensemble and string orchestra
For the inauguration of the ‘Hesli-Halle’ in Küsnacht.
Hesli-Fanfare - an interlude for violin solo, flute, clarinet, trumpet and ensembles - Fanfare intervention for trumpet and wind orchestra - New sounds on old grounds for clarinet and soloists.

Inannas Abstieg in die Unterwelt (2000)
Quintet
for flute, violin, two violas and violoncello
The Sumeric myth of the moon god Inanna, who loses herself in the underworld and is born anew, stimulates combinations and scenes in the world of sound.
Duration: 11' 00"

Pierre de Lune (2000)
for saxophone and strings (asx/6.5.4.4.2)
Duration: 17' 00"

Die Göttin (2001)
for male voice and piano
Texts: Robert Walser
Duration: 5' 00"

Sechs Miniaturen (2001-2002)
for wind quintet (fl.ob.cl.bn/hn)
Duration: 12' 00"

Topas (2002)
for farblichtfluegel
Duration: 6' 00"

Image mysterieuse (2002-2003)
Music
for large orchestra (3(pic,afl).2.ca.2(Ebcl).bcl.2.cbn/4.3.3.btba/hp/cel/4perc and a large string section)
Duration: 15' 00"

Vier Gesänge (2003)
for baritone and piano
Texts: Hans Magnus Enzensberger
For Hans Adolfsen and Ruben Drole.
Duration: 8' 00"

Bassiade (2004)
for doublebass solo
For the Koeckert Competition 2005 of the Hochschule Musik und Theater Zürich.
Duration: 4' 00"

Durch Raum und Zeit (2004)
for solo quartet (recorder or flute, oboe, trumpet, violine), string orchestra (9 violins, 3 violas, 2 violoncelli, double bass) and harpsichord
For the Braunwalder-Musikfestwoche 2005.
Duration: 14' 00"

Flechtwerk (2005)
for three bassethornists
For the trio CLARINO.
Duration: 9' 00"

Trio (2005)
for violine, violoncello and piano
For Seung-Yeun Huh and Eckart Heiligers.
Duration: 12' 00"

Wozu weiter? (2007)
Eight dongs
for soprano and piano
Texts: Kurt Marti
Duration: 11' 00"

Psalm (2008)
for baritone, bass clarinet, trumpet and organ
Texts: Paul Celan
Duration: 7' 00"

Die Glocke von San Nicolas in Valencia (2009)
Scene
for speaking voice, trumpet and assisting piano (without pianist)
Texts: Hugo Loetscher
Duration: 3' 00"
Manuscript

Schattenaug (2010)
for mixed choir and 3 clarinets
Texts: Jannis Zinniker
Duration: 15' 00"
Manuscript

5 Facetten (2010)
for piano
Duration: 7' 00"
Manuscript

Interpunctum (zum Musikalischen Opfer von J.S. Bach) (2010)
for flute, violin, violoncello and organ
Duration: 4' 00"
Manuscript

Ping-Pong (2011)
for piano trio, trumpet and female speaker
Texts: Hans Magnus Enzensberger
Duration: 23' 00"
Manuscript

Zwiegetön (2012)
for trumpet and piano (or organ)
Duration: 7' 00"

Traumbilder (2013)
for soprano, baritone and string quartet
Seven haikus by Peter Benary.
Duration: 15' 00"

(2014)


Duration: 6' 00"
Manuscript

(2014)


Duration: 13' 00"
Manuscript

(2017)


Duration: 12' 00"
Manuscript

(2018)


Duration: 13' 00"
Manuscript

See Siang Wong: Swiss Piano Project (Musiques Suisses Nr. MGB CTS-M 143, 2014)

Interpreten:

Wong, See Siang

Werke:

Kelterborn, Rudolf: Klavierstücke 1-6 (2001-2004)
Baumann, Felix: ich und ich (2009)
Marti, Cécile: changing five (2010)
Steinauer, Mathias: kurzkurz© (Live at Carnegie), op. 24 (2009)
Zimmerlin, Alfred: Klavierstück 11 (2009)
Zinsstag, Gérard: Cinq petites études sur les résonances (2008)
Baer, Walter: Zwielicht (2011)
Marti, Heinz: Méditation interrompue (2011)
Lehmann, Hans Ulrich: Klavierstück 2009 (2009)
Mettraux, Laurent: Traces gravées dans le sable, M. 673 (2009)
Wyttenbach, Jürg: ... innig beflügelt... (2009)
Wettstein, Peter: 5 Facetten (2010)
Hoch, Francesco: Flashback (2009)
Kinzler, Burkhard: circles & commas (2010)
Frank, Patrick N.: (.....) (2004)
Fueter, Daniel: Slumberland (2009)
Neukom, Martin: Studie 19.4 (2009)
Derungs, Martin: 5 Ausgänge (2010)
Rechsteiner, Franz N.: Ver-Fügungen (2011)
Ringger, Rolf Urs: So Tender was the Night (2011)
Nick, Andreas: Menora, sieben Erleuchtungen (2008-2009)
Wohlhauser, René: Morphologia - Polyphonia (2011)
Marti, Valentin: Storr (2012)
Karrer, Bruno: Helle Seelen ohne Saum (2013)
Dayer, Xavier: Cantus I (2014)
Lehmann, Hans Ulrich: Drei Miniaturen (2001)
Mit weiteren Werken von: Thomas Läubli, Jannis Weggenmann, Jonas Bühler

Info: www.fonoteca.ch

Keller - Steinbrecher: musica riservata (Grammont Portrait/ Musikszene Schweiz Nr. MGB CTS-M 85, 2003)

Interpreten:

Keller, Heinrich

Werke:

Lehmann, Hans Ulrich: Minuties (1998)
Mäder, Urban: en suite (1997)
Wettstein, Peter: Sieben Miniaturen (1974)
Zimmerlin, Alfred: Anderer Ort (1998)
Vassena, Nadir: Formulae (1995-1997)
Langlotz, Lukas: Facetten (1997)
Mit weiteren Werken von: Rudolf Kelterborn, Jia Guoping, Wang Peng

Info: www.fonoteca.ch

Rotondo oder "die Kunst des Fügens" (stv/asm Nr. 16, 2002)

Werke:

Bärtschi, Werner: Rotondo (1999-1999)

Info: www.fonoteca.ch

Kreuzende Wege - Komponistensekretariat Zürich (Grammont Porträt Nr. CTS-M 54, 1997)

Interpreten:

Griffiths, Howard

Werke:

Bärtschi, Werner: Federkopf (1996)
Gasser, Ulrich: Pasticcio (1995)
Keller, Max E.: Pentalog (1995-1996)
Wettstein, Peter: Ritornelli (1995)
Sigrist, Martin: INCROCIANDO ()

Info: www.fonoteca.ch

4 Streichquartette (Jecklin Szene Schweiz Nr. 283-2, 1992)

Interpreten:

Euler Quartett (ehemalig)
Carmina Quartett

Werke:

Moser, Roland: Neigung (1969-1972)
Streiff, Peter: Wandelnde Gänge (1985-1987)
Voegelin, Fritz: 4 Szenen für Streichquartett (1980)
Wettstein, Peter: Janus (1987)

Info: www.fonoteca.ch

Missa in Festo Pentecostes (Jecklin Nr. JD 617, 1987)

Interpreten:

Graf, Kathrin
Schiller, Christoph

Werke:

Holliger, Heinz: Introitus zu "Missa in festo Pentecostes" (1986)
Lehmann, Hans Ulrich: Alleluja 1 zu "Missa in festo Pentecostes" (1985)
Wettstein, Peter: Sequenz zu "Missa in festo Pentecostes" (1985)
Wildberger, Jacques: Communio zu "Missa in festo Pentecostes" (1985)
Haselbach, Josef: Alleluja II zu "Missa in festo Pentecostes" (1985)
Bennett, Gerald: Offertorium: confirma hoc (1986)

Info: www.fonoteca.ch

Kübler, Susanne: Frequenzen 2. Vier Schweizer Komponisten. Rudolf Kelterborn, Ernst Pfiffner, Rolf Urs Ringger, Peter Wettstein, Rüffer & Rub, Zürich 2005

Kreuzende Wege (Orchesterwerke von Werner Bärtschi, Ulrich Gasser, Max E. Keller, Martin Sigrist und Peter Wettstein), in: Katalog zum Projekt "Kreuzende Wege" des Komponistensekretariats Zürich 1996