The remarkable 1965 New York Concerts performances offer a rare, revealing glimpse into the discographic dark period. This captivating double LP would be valuable solely for the brilliant music, which finds Jimmy Giuffre leading otherwise undocumented trio & quartet lineups, advancing his experiments in counterpoint and abstraction into more adventurous avant-garde territory. But it also offers insight into one of jazz’s most innovative thinkers at a key moment in his development. 180-gram vinyl.