Triptych in B♭ is a spontaneous piano improvisation unfolding in three contrasting yet connected sections — the outer panels in B♭ Mixolydian ♭6 frame a reflective central panel in B♭ Dorian. Rapid interlocking triplets create a sense of kinetic motion, while the middle section opens into spacious lyricism. The whole work balances precision and abandon, shimmering between brightness and shadow.