The filmed black-and-white performance of “Impressions” with Coltrane and Dolphy captures two radically different improvisational approaches in real time. Coltrane builds his solo from long, sustained tones and expansive modal phrases, while Dolphy favors sharp, angular lines rooted in bebop language. As with “Milestones” and “So What,” it is the modal approach introduced by Miles Davis that ultimately proved more enduring. Among jazz musicians, modal phrasing became the dominant vocabulary, while the bebop-based lines of players like Adderley and Dolphy remained more individual and less widely adopted.