This 1977 date joins two jazz giants with contrasting approaches: Gillespie's explosive bop trumpet virtuosity and Basie's laconic piano style. The bare-bones quartet format--with the sterling rhythm team of bassist Ray Brown and drummer Mickey Roker--does nothing to conceal the differences, but it sets up a comfortable middle ground that accommodates swing and bop nuances alike. Differences apart, the co-leaders share infectious warmth, a deep feeling for the blues, and an absolute compulsion to swing. Basie's understatement triggers some of Gillespie's most thoughtful playing of his later career, developing long, intricate solos that combine harmonic exploration and direct, speechlike inflections, often with the distinctive burr of a harmon mute. The settings--two Gillespie tunes, the ancient "St. James Infirmary," and a series of impromptu collaborations--are casual, doing nothing to encumber the musicians in a session they're clearly enjoying. --Stuart Broomer