Producer Charles Dickerson, a.k.a. Mono/Poly, is a member of L.A.’s massively influential avant-hip-hop crew Brainfeeder whose cosmic beats have made fans out of Erykah Badu and members of Radiohead. On Aug. 26, he’ll release his third album, Golden Skies, which exemplifies Brainfeeder’s reputation for blending classic rap, soul, jazz, and funk into a warm, organic whole that sounds both intensely futuristic and deeply retro at the same time somehow.