As an improviser, breaking down whom you play with into specific 'groups' is an imprecise activity. Nevertheless, here is, mainly, a selection of active and long-lived collaborations which have, I think, special individual qualities.
Steve BERESFORD: electronics.
Chris BURN: piano + "ENSEMBLE".
The CONTEST OF PLEASURES: Xavier Charles clarinet, Axel Dörner trumpet.
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Rhodri DAVIES: harp.
John EDWARDS: double bass - duo / quartet - Alberto Braida & Fabrizio Spera.
Gerry HEMINGWAY: drums.
Christof KURZMANN: lloopp.
Phil MINTON: voice - duo / trio - Erhard Hirt / quartet - Veryan Weston & Roger Turner.
Torsten MÜLLER / Dylan VAN DER SCHYFF: bass & drums
Paal NILSSEN-LOVE: drums - duo / quartet - Sten Sandell & Johan Berthling.
Eddie PREVOST: tam-tam & percussion.
Gino ROBAIR: drums & percussion.
The SMALLER BRETHREN: Steve Beresford electronics, Paul Lovens drums & percussion.
THERMAL: Andy Moore guitar, Thomas Lehn synth.
+ + +
Toshimaru NAKAMURA: no-input mixing desk
Akio SUZUKI: sound artist
Bill HSU: computer & real-time timbre recognition
CORTET: piano, harp, synth
Fred LONBERG-HOLM/MICHAEL ZERANG: cello/drums
SPONTANEOUS MUSIC ENSEMBLE:
Roger Smith spanish guitar, John Stevens drums.BUTCHER / DURRANT / RUSSELL:
John Russell acoustic guitar, Phil Durrant violin.Derek BAILEY: guitar.
NEWS FROM THE SHED:
Radu Malfatti trombone, John Russell acoustic guitar, Phil Durrant violin,
Paul Lovens drums & percussion.Phil DURRANT: live electronic processing.
Vanessa MACKNESS: voice.
Peter NYKYRUJ: drums.
EMBERS:
Chris Burn piano, Jim Denley flute, Marcio Mattos cello.FRISQUE CONCORDANCE:
Georg Gräwe piano, Hans Schneider double bass, Martin Blume drums.POLWECHSEL:
Burkhard Beins perc., Martin Brandlmayr perc., Werner Dafeldecker double bass,
Michael Moser cello / computer.