Brazilian saxophonist Ivo Perelman's goal to release on the historical ESP label originated from the impression Gato Barbieri's 1967 ESP album left on him, here assembling ESP alumni, drummer Bobby Kapp, pianist Matthew Shipp and bassist William Parker (who made his recorded debut on ESP in 1973), in a lyrical album of advanced and impressive collective free jazz.

Releasing albums at a furious pace, Brazilian/NY saxophonist Ivo Perelman continues his collaborations with some of New York's finest players, here in a quartet with Matthew Shipp on piano, William Parker on bass and Bobby Kapp on drums, in the appropriately titled 7-part "Heptagon" of lyrical free improvisation of great intensity and dialog.