bass Dave Holland
tracks a1 to b3 bass Miroslav Vitous
tracks b5 to d4 cello, guitar Dave Holland
tracks b5 to d4 clarinet, alto saxophone Anthony Braxton
tracks b5, b6, d1 to d4 contrabass clarinet Anthony Braxton
design Bob Cato
tracks b4, c1 to c3 drums Barry Altschul
tracks a1 to b6 drums Roy Haynes
engineer Tony May
tracks c1 to c3 flute Anthony Braxton
liner notes Stanley Crouch
tracks c1 to c3 percussion Barry Altschul
tracks b5, b6, d1 to d4 percussion Chick Corea
piano Chick Corea
producer Sonny Lester
project manager [project director] Charlie Lourie
reissue producer Michael Cuscuna
Three previously unreleased sessions featuring the composer/pianist at the peak of one of his most exploratory periods.

Tracks A1 to B3 recorded in New York in May, 1968.
Track B4 recorded in New York on April 7, 1970.
Tracks B5, B6, D1 to D4 recorded in New York on Oct 13, 1970.
Tracks C1 to C3 recorded in New York on Oct. 19, 1970.