Impulse Quadraphonic gatefold sleeve issue from 1973. Recorded at El Saturn Studios, Chicago, 5/7/1972. Featuring musicians include Sun Ra, Akh Tal Ebah, Lamont McClamb (Kwame Hadi), Charles Stephens, Marshall Allen, Danny Davis, John Gilmore, Danny Ray Thompson, Elmoe Omoe, Pat Patrick, Alzo Wright, Ronnie Boykins, Tommy Hunter, Ruth Wright & June Tyson.

• A1 Astro Black
• A2 Discipline "99"
• A3 Hidden Spheres