BB was trumpeter for Ray Charles — actually he plays a double-trumpet — who co-produced this ace LP of funky big-band jazz for his own Crossover imprint in 1974. 
Also featuring Monk’s bassist Larry Gales, drummer Clarence Johnston (who recorded some killer Blue Notes with Freddie Roach), saxophonist Herman Riley (Side Effect, Pleasure, Letta Mbulu), and guitarists Jef Lee (from various Roy Ayers projects) and Calvin Keys (Black Jazz Records).

With the fabulous Forty Days, as sampled by Tribe Called Quest for Luck Of Lucien, and by Mobb Deep etc etc…