Critics tend to fall over themselves when describing Canadian violinist James Ehnes: “The wondrous James Ehnes, a thinker of the violin as well as a supreme virtuoso of the instrument” wrote the Daily Telegraph. But why take their word for it, when you can hear him for yourself - playing with his regular collaborator Andrew Armstrong in a programme that sets the power of Shostakovich’s brooding Violin Sonata against the sheer dazzlement of the 19th century virtuoso tradition?