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 received the award New Austrian Sound of Music 2018-2019 in the category Contemporary Music. With their recent transdisciplinary and sound art works, many of which incorporate site-specific sound installations and audience participation, they research into the relationship and balance between visual and audio elements, intentionality and un-intentionality, nature and artificiality, human and machine. In their experimental music projects, they work with various sound sources – 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, etc. for sites such as opera house, bowling alley, theatre, living room, university auditorium, vinyl shop, galleries, etc.
Duo works of Cao Thanh Lan and Gregor Siedl have been featured at art institutions, international festivals and venues around the world, amongst others – Ming contemporary art Museum Shanghai, Taipei Contemporary Art Center, Koganecho Art Center Yokohama, Figya Art space Osaka, Operadagen Rotterdam, Musiktheatertage Vienna, 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, Hanoi New Music Festival, Ftarri Tokyo, Nomart Gallery Osaka, CHELA Buenos Aires, National Opera Hanoi, Institut Francais, The Factory Contemporary Art Center HCMC etc. They have been touring in Europe, Iran, Japan, China, Taiwan, South Korea, Argentina, Brazil, Uruguay, Chile, Finland, Vietnam, Australia and Indonesia.