Black-Unity-Verve-By-Request-SeriesFor 1971's Black Unity, Pharaoh Sanders added groove to the foundation of spiritual and free jazz he had explored on his previous Impulse! albums. The result is a piercing and emotive 37 minute title track exploration of African, Latin, aborigine and Native American sounds, driven by rhythm. Verve By Request Series features transfers from the analog tapes remastered on 180 gram vinyl.