Although earlier graphic scores by Cage, Feldman and Earle Brown handed Cornelius Cardew a starting point, no other graphic score has quite captured the collective imagination like the 193 pages of Treatise, written between 1963 and 1967. This was the piece that gave Cardew his entrée into AMM and the Eddie Prévost/John Tilbury/Keith Rowe incarnation of that group recorded a selection of pages in 1984. There is also a fine recording from 1967 led by the flutist Petr Kotik on Mode Records, while a HatArt version from 1998, featuring a group of Chicago-based improvisers led by Art Lange claims to be the first ‘complete recording’ – a claim matched by this new recording from the Dorset-based experimental new music ensemble Gerauschhersteller. No recording of Treatise can, by definition, ever be considered definitive, and no matter what arguments either group might present about their deployment of that word ‘complete’, I'm just pleased to have another thoughtful and beautifully heard performance. The Chicago ‘complete’ performance is 140 minutes while this new one sprawls over the five-hour mark, that apparent discrepancy explained by Gerauschhersteller's decision to allocate 90 seconds to each page. The performance begins with a reiterated high note, reminiscent of Terry Riley's In C, but then the soundscape broadens exponentially: occasional free jazz energies fizzle out inside a labyrinth of trippy electronic drones and instrumental chess moves.