Cao Keller Siedl Trio_(c) Photomusix:Cristina Marx
Photo credit (c) Photomusix/Cristina Marx

Realtime Composition for prepared marxophone, feedbacker guitar, clarinet and electronics.

Cao-Keller-Siedl is a Swiss-Austrian-Vietnamese trio, with Beat Keller (CH) on a customised feedbacker guitar, Gregor Siedl (AT) on clarinet and electronics, and Cao Thanh Lan (VN/AT) on self-built electronics and prepared marxophone.
For Cao Keller Siedl, “energy” means “intensity,” and of course musical intensity can be at its maximum in the quietest moments. Pulsating patterns of high-frequency beats, suddenly emerging dreamy chords, then again deep growls of feedback that come rising up from the lower registers are only a very few of the varied, but never arbitrary, structural devices of their music. Creating beauty from harsh and tender materials alike, their music certainly has a redeeming quality in facing some of the ugliness of the human condition.

Text: Gerald Fiebig


Cao Thanh Lan (VN) – prepared marxophon, electronics
Beat Keller (CH) – feedbacker guitar, electronics
Gregor Siedl (AT) – clarinet, electronics