20th century classical Alvin Lucier ambient ambient/drone AMM Another Timbre avant-jazz avantgarde Black Truffle contemporary classical dark ambient drone eai ECM Editions Mego electroacoustic Elsewhere Erstwhile experimental experimental electronic field recordings free impro free jazz Hubro Inexhaustible Editions John Tilbury Jürg Frey Keith Rowe Melaine Dalibert Michael Pisaro minimalism modern classical new age New Focus Recordings noise Norway reductionism Reinier Van Houdt Room40 silence Sofa Music sound art Stephen O'Malley Unseen Worlds Wandelweiser