Saxophonist Joshua Redman leaves precious little of the horn's sonic potential unblown. He delivers even the most labyrinthine improvisations with immense inner swing, even unaccompanied.

Redman sows a steady trail of clues through even the wildest of improvisations. This makes his performances highly accessible and the ingenuity of his solos seem all the more resourceful. The downside is a perceptible air of calculation. Coupled with a fondness for spectacular set-pieces and a repertoire of originals from his new album, Beyond, the mix can flag a little by the end of a 90-minute set.

Redman stayed close to the American postbop line, but exploited it with his customary energy, aided by a supporting trio that plays with the eager understanding that comes from high skill mixed with regular contact. The saxophonist opened with an unaccompa nied sermon-like exposition that burst into an up-tempo swinger, Leap of Faith, and followed it with the more oblique and exploratory Suspended Animations. Redman's sublime tenor tone and his uncanny multiphonic duetting with himself showed his class, but it was a standard, The Shadow of Your smile, and not his own repertoire that unfolded his most distinctive strengths.

At the Corn Exchange, Cambridge (01223 357851) tonight and De Montfort Hall, Leicester (0116 2333111) tomorrow.