Busdriver hails from LA’s Good Life Cafe scene, which also produced the artistically spine-tingling but street-as-hell Freestyle Fellowship, Aceyalone and Micah-9. Whilst his own efforts may not stun the mind in quite the same way as those of his predecessors, there’s much that impresses here. “Pool Drowning” provides the perfect introduction to his voice-as-instrument approach, and Abstract Rude adds pedigree to the excellent “Unnecessary Thinking.” Cosmic Cleavage may consolidate rather than develop Busdriver’s influences, but it nevertheless remains a collection worth hearing.