On PlainsPeak, alto saxophonist Jon Irabagon leads a pared‑down yet powerful quartet that includes trumpeter Russ Johnson, bassist Clark Sommers, and drummer Dana Hall, traversing a sonic map of Chicago. This work of original compositions balances playful invention with the horn interplay and nimble instrumental dialogue, all anchored by a rhythm section whose groove deepen the listening experience. It’s a production of engaging immersion into its courageous exploratory approach.