Lehn has recorded with Marcus Schmickler, Keith Rowe, John Butcher, Phil Minton, Phil Durrant, Radu Malfatti, Axel Dörner, Cor Fuhler, Gerry Hemingway, and Andy Moor of The Ex. He is a member of the electronic orchestra M.I.M.E.O..
In 1997 Lehn formed a free improvisation band Konk Pack. They have released three CDs.
- Big Deep (1999)
- Warp Out (2001)
- Off Leash (2005)
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