On the cover: Manuel Göttsching (the Ash Ra Tempel guitarist reveals how he made electronic masterpiece E2-E4, influencing 30 years of repetitive house and track rock). Features: Roger Reynolds (American New Music's answer to Xenakis is extending the power of percussion on Sanctuary); Andre Vida (Clive Bell meets a sax improviser who's worked with everyone from Anthony Braxton to Jamie Lidell); Invisible Jukebox: Spinn & Rashad (Chicago's Juke duo perform some fancy Footwork around The Wire's mystery record selection); Grouper (For Liz Harris, escaping a childhood sect unlocked a range of morbid confrontations with the void, from tape works to Ambient song); Sandwell District (Robin Howells keeps the peace between the brutalist international techno trio who have created a label hub for fetishistic electronica); The Primer: Turkish psychedelia (A user's guide to the byzantine East-West acid folk and rock fusions of Anadlou psych); Collateral Damage (Sharing out-of-print records online confounds received narratives of musical history, argues Mutant Sounds' Eric Lumbleau); Global Ear: Belfast (Peter Rosser observes Northern Ireland's ascension as a world capital of sound art); Cross Platform: Nathalie Djurberg (The Swedish artist's creepy video animations are enhanced by the sonic machinations of collaborator Hans Berg); Epiphanies: Man Booker-nominated novelist Esi Edugyan praises the voice of Polish soprano Marcella Sembrich).