Ethan Iverson, ‘I Can’t Get Started (Live at the Village Vanguard)’

Free of tempo, with just enough clutter in the left hand to sow some doubt, the pianist Ethan Iverson starts this famously bittersweet melody in one key before slipping absently into another, then another. Finally he returns to where he began, and his all-star quartet — the trumpeter Tom Harrell, the bassist Ben Street and the drummer Eric McPherson, doing delicate brushwork here — slumps down around him, all hands on deck to carry the piece forward together. He and Harrell each take coolly elucidated solos, savoring the melody and taking time to draw a lot out of certain individual phrases, before Iverson finishes the way he began: alone, wandering between keys, destabilizing his resolutely sturdy sound. GIOVANNI RUSSONELLO

Taylor Ho Bynum 9-tette, ‘Neither When Nor Where’