He has played and recorded with a large number of fine musicians, from Jim O'Rourke to Christian Marclay, from Butch Morris to Otomo Yoshihide.
Müller was a founding member of the trio Nachtluft, with Andres Bosshard and Jacques Widmer, who have been creating sound-installations and sound-architecture, and of the electronic quartet Poire_Z with Erik M and Voice Crack.
He is part of MKM with Jason Kahn and Norbert Möslang, and of the Signal Quintet with Jason Kahn, Tomas Korber, Norbert Möslang, Christian Weber.
Müller plays solo, and now and then in various combinations - often in duo - with Taku Sugimoto, Jason Kahn, Steinbrüchel, Norbert Möslang, Toshimaru Nakamura, Tomas Korber, Lê Quan Ninh, Keith Rowe, eRikm, Carlos Zingaro, Sachiko M, Michel Doneda, Urs Leimgruber.
He played allover Europe, in Russia, USA, Canada, Latin America, Japan, Corea, New Zealand, and Australia.
Various recordings released on For 4 Ears, the label he founded in 1990, as well as on Erstwhile, Cut, Grob, List, Audiosphere, Amoebic, Rossbin, Creative Sources.
- 3 Remix
- 107 Instruments & Performance
- 25 Writing & Arrangement
- 1 Featuring & Presenting
- 10 Production
- 36 Technical
- 24 Visual
- 1 Acting, Literary & Spoken