“Every seasoned jazz listener knows Thelonious Monk’s Epistrophy, a jazz classic that’s been around for ever. Here, Bill Frisell (guitar) and Thomas Morgan (double bass) begin with what sounds like isolated random notes. The notes become melodic fragments that gradually grow together, revealing tantalising, Monkish hints until, finally, Epistrophy itself emerges. As an improvised duet, that’s not j”