Aleph (1966)
Instrumentation: for flute solo
Duration: 4' 00"
Manuscript
Bläserquintett (wind quintet) (1972)
Instrumentation: for flute, oboe, clarinet, horn and bassoon
Duration: 12' 00"
Manuscript
Puzzle (1973)
Instrumentation: variable - for between 1 and 20 flutes
A "kit" composed of 20 different elements of varying degrees of difficulty, which can be combined in any way.
Duration: variabel
Hug & Co. Musikverlage
Limmatquai 28-30
CH-8001 Zürich
...Streichquartett.... (...string quartet....) (1973)
Contains theatrical elements, which the interpreters required to stage and act out.
Duration: 15' 00"
Manuscript
Reduktion (1974)
3 movementsInstrumentation: for flute, violoncello and harpsichord
Duration: 10' 00"
Hug & Co. Musikverlage
Limmatquai 28-30
CH-8001 Zürich
Refrains (1975)
Instrumentation: for flute, harp, celesta and percussion
Duration: 15' 00"
Manuscript
Nachtstück (1977)
Instrumentation: for alto flute in G solo
Duration: 5' 00"-10' 00"
Manuscript
Ritual (1979)
Instrumentation: for flute and string orchestra
Was composed for an amateur orchestra and can be performed by one.
Requirements: each 4 violins I and II, violas and violoncelli or larger, similarly unequally distributed instrumentation, but with only one double bass (partly solo).
The (flutes-) solo part is demanding and requires flexibility.
Duration: 15' 00"
Manuscript
Rencontre (1984-2003)
Instrumentation: for flute and harpsichord
Duration: 8' 00"
Manuscript
Verlorene Spur (1987)
Instrumentation: for piano
Duration: 4' 00"
Manuscript
Studie (study) (1990)
Instrumentation: for flute solo
Duration: 5' 00"
Manuscript
Fragmente (fragments) (1992)
Instrumentation: for 4 flutes
Duration: 6' 00"
Manuscript
Was aber höre ich? (1997)
Instrumentation: for flute and speaking voice
Texts: Christian Vetz
Duration: 6' 00"
Manuscript
Rand (2000)
Instrumentation: for flute solo
Duration: 5' 00"
Manuscript
Zeichen (2002)
Instrumentation: for harpsichord solo
Duration: 4' 00"
Manuscript
Keller - Steinbrecher: musica riservata (Grammont Portrait/ Musikszene Schweiz Nr. MGB CTS-M 85, 2003)
Interpreters:
Keller, HeinrichWorks:
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)
With more works of: Rudolf Kelterborn, Jia Guoping, Wang Peng