Here is a nice listen:
Pearl & Umbra (1999) is a rare and impressive recording, involving 34 musicians. The gotha of the new musics scene is contributing to this album: Eraldo Bernocchi, Michael Brook, Harold Budd, Sussan Deyhim, Brian Eno, Roger Eno, Peter Gabriel, Robin Guthrie, Bill Laswell, Paul Schutze, David Sylvian, Ian Walton and Hector Zazou, to name but a few...
http://justanothergarden.blogspot.com/2008/12/russell-mills-undark-pearl-umbra-1999.html