This CD brings back one of altoist Lee Konitz’s greatest sessions. In 1967 he recorded a series of very diverse duets, all of which succeed on their own terms. Konitz is matched with valve trombonist Marshall Brown on a delightful version of “Struttin’ With Some Barbecue” and matches wits with the tenor of Joe Henderson on “You Don’t Know What Love Is.” He plays “Checkerboard” with pianist Dick Katz, “Erb” with guitarist Jim Hall, “Tickle Toe” with the tenor of Richie Kamuca (Konitz switches to tenor on that cut), and an adventurous and fairly free “Duplexity” with violinist Ray Nance. Konitz also has three different duets on “Alone Together” and, on “Alphanumeric,” welcomes practically everyone back for a final blowout. The music ranges from Dixieland to bop and free, and is consistently fascinating. – Scott Yanow