Todd Mumford got into music production as a college radio DJ at UC Santa Barbara, and he‘s been studying both mainstream and the underground ever since. Constant Evolution is a straightforward amalgam of hip-hop and electronica spruced up with an occasional reggae-inflected track or lounge sample. LA‘s underground rises up to contribute guest vocals; Senim Silla raps about big brother and Myka 9 offers tangled rhymes about art, life, and accused Baretta star Robert Blake. Brother Ali‘s deep bellow makes "Treacherous" the stand-out track. Mum‘s a competent producer but has yet to find his own sound.