Through it's strength, it's cohesive force, this National Triangle of Jazz is irresistible. Watch out for the subtlety of the pyrotechnist - his swift virtuosity is simply the emanation of the most touching internal joy. There is nothing ostentatious about this man who ushers his two rhythmic brothers in a flurry of twirling notes. Ten years ago, Barthelemy was 'Modern'. In 1994, he is still so.