Pianist Matthew Shipp and bassist William Parker, whose avant-garde musical relationship spans four decades, reunite for the fourth time in the duo format on their new Tao Forms release, Whole System Of. (Their first duo effort, 1994’s Zo, has been rereleased simultaneously on ESP-Disk. CD and vinyl are available for both titles via Bandcamp.) Also recently released is a fine live recording of the Cecil Taylor Unit’s memorable 1979 appearance in Albuquerque.