 Another key relationship has been with singer Phil Minton, which included Butcher's participation in "mouthfull of ecstasy", Minton's setting of texts from James Joyce's "Finnegans Wake".More recently he has become centrally involved in the form of rarefied, minimalist improvisation that has been dubbed "electroacoustic improvisation" or "lowercase", most notably as a member of the pioneering Austrian group Polwechsel.Other playing partners have included John Edwards, Simon H. Fell, Gino Robair, Georg Gräwe, Gerry Hemingway, Akio Suzuki and Dylan van der Schyff.