...Barry Altschul's roots are in bebop. His approach to that music draws from an unusually rich and varied sonic vocabulary. He uses the past as grounding and guide, not as a directive. His strong listening skills support his ability to invent and respond freely in the moment. He can thus begin with a tune, but take it anywhere that his ears might lead him in the moment--within, around, or away from the tune. (Bob Gluck, The Miles Davis Lost Quintet and Other Revolutionary Ensembles, 2016, p. 93.