The last set is over, and the club is almost empty. The bassist has already gone home, the drummer is walking out the door. That leaves the saxophonist and the pianist, but they decide they're not done yet. They have more ideas to exchange, more confidences to share. They begin to play again, only this time just for themselves. Do most saxophone and piano duets start out this way? Surely not, and yet the best of them could fool you, with their intimate, nocturnal ambience, their exploration of 'songs of love and regret', as the saxophonist Marion Brown and the pianist Mal Waldron called their 1986 album. On Random Dances and (A)Tonalities, the new album by the pianist Aruán Ortiz and the reedman Don Byron, the music is unapologetically cerebral, like the title.


