Christian Wolff, now 83, is the last surviving member of the New York School, a loose coalition of composers that grouped around John Cage during the 1950s and also included Morton Feldman and the jazz-loving Earle Brown. This set finds him in partnership with percussionist Eddie Prévost, rekindling an association that stretches back to the late 1960s when Wolff became a semipermanent member of AMM and, subsequently, their regular guest. The first set was recorded at IKLECTIK in Lambeth and the second a few months later at Dartmouth College in Hanover, New Hampshire, which boasts a better piano – the IKLECTIK piano, which used to be housed at Cafe OTO, is surely the worst instrument in London – but a remarkable consistency of gesture and mood is sustained throughout. The duo incarnation of AMM – Prévost and pianist John Tilbury, following the abrupt departure of guitarist Keith Rowe in 2005 – is an obvious point of reference and, although Uncertain Outcomes could credibly have been released under the AMM tag, Wolff's brand of pianism bears little relation to Tilbury's congregations of harmony underpinned by a tremble of excitement. Matching the obsessions of his composed work, Wolff is a more linear player who relishes taking apparently simple lines for complex walks, while Prévost's knack of sculpting melodies that gyrate through the air like ticker-tape by manipulating the vibrations of his tam-tam rather leaves me in awe.