tracks a1 to a3, b4, c4 to d2 bass, electric bass John Heard tracks a4, b1 congas Armando Peraza design [cover design] Ulrich Eichberger tracks a1 to b1, b4, c4 to d2 drums Dick Berk tracks a4 to b3, c1 to c3, d3, d4 engineer Jim Gaines tracks a1 to a3, b4, c4 to d2 engineer Ken Hopkins tracks a4, b1 flugelhorn, trumpet Luis Gasca tracks a4, b1, c1, d4 keyboards, trombone, conductor George Duke liner notes Baldhard G. Falk tracks a1 to a3, b4, c4 to d2 percussion Dick Berk photography by Baldhard G. Falk tracks a1 to a3, b4, c4 to d2 piano, electric piano [rhodes, wurlitzer] George Duke producer Baldhard G. Falk tracks a4, b1, c1, d4 tenor saxophone, soprano saxophone, flute Jerome Richardson tracks a4, b1 violin [amplified bass violin] John Heard tracks d3 violin [bass] James Leary Recorded At Wally Heider Studios Produced For MPS Records Distributed By BASF Recorded in 1971 at Wally Heider Recording, San Francisco, Calif. Produced for MPS Records by BALDHARD G. Falk On Center label: Aufnahme MPS Records - Vertrieb BASF ℗ 1973
The original plans were to release the two LP's of this album under the titles Solus and The Inner Source separately.