Matthew Shipp, the supreme jazz pianist of his generation, and Mat Walerian, the finest Polish jazz woodwind player of his, have combined their talents in concert on several occasions. This album documents one such instance, from May 2012. Shipp hardly needs an introduction at this point thanks to a career of over a quarter century, including not only many acclaimed albums under his own name but also a long and prominent tenure in the David S. Ware Quartet and a vast array of collaborations with…