Chick’s early collective Circle was a trailblazing unit in the world of free jazz, putting aside traditional harmonic structures in favor of texture and pure, freewheeling invention. Paris-Concert is one of the lynchpin recordings of the genre: it demonstrates the true passion that lies at the heart of free music, and what’s possible when four deeply engaged musical minds — Chick, Anthony Braxton on saxophone, Dave Holland on bass and Barry Altschul on drums — combine for a set of probing, relentless explorations.