Brian Kellock, Jon Erik Kellso

There's no more famous Duet in Jazz than the 1928 Weather Bird collaboration of Louis Armstrong and Earl Hines.

The trumpeter and pianist showed that jazz could be a thrilling conversation, with two soloists spurring each other on, and responding sympathetically to everything their partner did. It was a revolution in jazz. Kellock and Kellso are musicians inspired by such approaches, and they can also sound like Hines and Armstrong, although they'll honour all the greats of swinging jazz in their Edinburgh summit.