The first rule of MANTRA is “You do not talk about MANTRA.” The second rule is that if you find yourself unable to stop thinking about MANTRA, you talk around it, circle it, cultivate the soil from which it grows. That is how this album begins, not with Karlheinz Stockhausen’s looming monolith, but with John Liberatore’s Sedgeflowers, a choice that feels both mischievous and deeply principled. Pianists Ryan McCullough and Andrew Zhou do not kick down the door. They plant something. And what emerges is an astonishingly inventive and coherent program that understands that radicalism is a spirited little ouroboros