Saxophonist and flutist Henry Threadgill is, alongside fellow Chicagoans Muhal Richard Abrams, Roscoe Mitchell, and Anthony Braxton, one of the most original jazz composers to emerge from the 20th century. Threadgill's art transcends stylistic boundaries; he embraces music wholesale from ragtime, circus marches, classical, bop, free jazz, reggae, funk, and more. He spent the '70s in the groundbreaking experimental jazz trio Air with Fred Hopkins and Steve McCall, issuing six albums. Between 1982 and 1989, the Henry Threadgill Sextet issued a half-dozen more including You Know ...