On paper, it looks like a world jazz supergroup made in heaven: Dhafer Youssef, Miguel "Angá" Díaz and their leader, the Cuban pianist Omar Sosa. The instrumentation, augmented by digital effects and samples, precludes any temptation to slip into jazz trio conventions. Tunisian oud player and singer Youssef is known for his glassy soundscapes; Echu Mingua, the current CD by Cuban conguero Díaz, is an eclectic concept album.

What we hear on this first gig of the new trio's UK tour is a tug-of-love between Afro-Cuban jazz and a host of contemporary and traditional influences. What distinguishes Sosa's playing from other dazzling pianists on the scene is the way his improvisational muse is governed by the clave and montuno of Afro-Cuban music. Even at his most florid, Sosa's pattern-making is drawn back to this invisible scaffolding, and Díaz is on hand - with a gorgeous-sounding percussion set-up - to pick up the beat at a moment's notice.

The material, by Sosa and Youssef, is based on dynamic riffs and attractive motifs, developed more like jams or movie cues at present than fully worked arrangements. In terms of effective jazz composition, the supergroup could learn much from Byron Wallen's quartet Indigo and the tightness and freedom with which they interpret Wallen's material.

The highlights of their set include The Journeyman and What Happens to a Dream Deferred, both based on the poetry of Langston Hughes, and presented by Wallen with communicative style and commitment. Indigo is a great British band that can really cut it on the international circuit.

· The Omar Sosa Trio play the Salisbury festival (01722 320333) tonight, then tour.