Siedl/Cao is a Vienna-based composer-performer and sound artist group. They work in the field of contemporary electronic and instrumental music, music theatre and sound art. They are Cao Thanh Lan from Vietnam and Gregor Siedl from Austria. Siedl/Cao is one of 5 groups from Austria that are selected for the renowned program New Austrian Sound of Music 2018-2019 in the category Contemporary Music.

Their works have always been centered on the physical experience of sound the inherent link between visual and audio elements.

Hanoi traffic noise, clarinet, Vietnamese hubble bubble smoking pipe, daxophone, air pump, servo motors, precompressed spring, modular synthesizer, crackers, text-to-speech, marxophone, plastic plants, gaffer tape, infusion bags… are their sound sources for diverse works and performances for sites such as opera house, bowling alley, theatre, living room, university auditorium, vinyl shop, gallery, etc.

For their projects and cooperations, they have received grants from – Austrian Federal Chancellery (BKA) for Art and Culture, Austrian Cultural Forums in Tokyo, Brussels, Bangkok, Tehran, Hanoi and Warsaw, Cultural Department of Lower Austria, Austrian Embassies, ON-Neue Musik Cologne, Ministry for Culture in Nordrhein-Westfalen (MFKJKS-NRW), Rhein-Energie Stiftung.

Duo works of Cao Thanh Lan and Gregor Siedl have been featured at international festivals and concert venues around the world, amongst others – Operadagen Rotterdam 2018, Musiktheatertagen Vienna 2018, Festival „Krieg singen“ im Haus der Kulturen der Welt Berlin, FIME – Festival Intern. de Musica Experimental Sao Paulo, Frischzelle Festival für Intermediale Performance Köln, Strom Festival Köln, Opera Hanoi, Festival Ankunft Neue Musik Berlin, Ftarri Tokyo, Nomart Osaka, WIM Zürich, CHELA Buenos Aires, Institut Francais Hanoi, etc. They have been touring in Europe, Japan, Brazil, Iran, China, Taiwan, Argentina, Uruguay, Chile, Finland, Vietnam, Australia and Indonesia.

Duo Siedl/Cao has also given workshops on contemporary composition and improvisation at Monash University Melbourne, BoxHill Institute Melbourne, National University of Hsinchu Taiwan, Sungshin Women’s University Seoul,Mahidol University Bangkok, Äänen Lumo Helsinki, Universidad de La Serena Chile, Universidad de Montevideo Uruguay, Meridian Space Beijing, DOMDOM Center for experimental music Hanoi, etc.


piano, modular synthesizer, zither, electronics, composition

born 1987 in Hanoi, Vietnam. She works in the fields of contemporary instrumental and electronic music, sound art and music theatre. She was trained as a classical contemporary music pianist (with Pierre-Laurent Aimard) in Cologne and in Brussels Conservatories. She has been experimenting with analogue and modular synthesizer, amplified objects, prepared marxophone/zither, low-tech electronics, etc. She is the scholarship holder of Startstipendium 2018 from Austrian Federal Chancellery. Active as an experimental sound artist composer in Berlin, Vienna and Cologne in many different projects, notably the composer-performer Duo Siedl/Cao – in collaboration with Gregor Siedl, she has been touring and giving workshops for contemporary music and improvisation in Europe, Japan, Brasil, China, Taiwan, Argentina, Uruguay, Chile, Finland, Australia and Vietnam. Her works have been released on labels Impakt, Flaming Pines, Acefalo Records and Syrphe. Also active as a guest pianist of Kammerensemble Neue Musik Berlin (KNM Ensemble), she has performed at Ultraschall Festival, Musica Electronica Nova Wroclaw, Galeriewanderung Berlin, etc. She has also earned a wide range of ensemble experience in festivals namely Klangspuren with Ensemble Modern Frankfurt, Darmstadt Festival for new music, Festival Ircam Paris@Manifest, Impuls Festival, International Kamermuziek Festival Schiermonnikoog, etc.


saxophones, clarinet, tubes, gamecalls, electronics, composition

was born in Vienna, Austria. He is deeply engaged in the field of experimental and improvised music. Through his explorations of extended techniques, preparations on the saxophone, clarinet and the use of extra-musical instruments such as game-calls and water, he has developed a unique voice in music.

Gregor won first prizes as best improviser at international music competitions XL-Jazz and Gent Jazz festival competition. He has been involved in experimental music, jazz, multi-disciplinary projects with performers, visual artists and artificial intelligence. He is a band-member of Junk Orbit, Parallel Asteroid, DOKO, Auralisation Ensemble, Osmosis Project and critically acclaimed European-Saxophone-Ensemble. He has performed all over Europe, Asia and South-America at international music festivals and concert venues, such as: Festival Ankunft Neue Musik Berlin, Festival Internacional de Musica Experimental Sao Paulo, Shanghai Jazzfestival, Jazz D`Or Strassbourg, HdKW Berlin, Belgrade Jazz Festival, Vilnius Jazz Festival, Gent Jazzfestival, Toots Thielemans Jazz Award Brussels, Follow the sound Festival Antwerpen, Storm!-Festival, LeXGiornate Milan, Gaume Jazz, Porgy&Bess Vienna, Ftarri Tokyo, LE Osaki Tokyo, Koko Club Helsinki, Hot Club Lisboa, Estonian Academy of music, Improvised Music Co. Dublin.



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