San Francisco label Six Degrees has been putting out world music with a tech twist for a decade now. Their roster has advanced both world music and electronic music culture by fusing global beats with technology. Oddly enough, they celebrate their forward-thinking philosophy with a covers album. Banco de Gaia takes on Pink Floyd’s “Echoes,” while tabla titan Karsh Kale versions The Police’s “Spirits in the Material World.” But did we really need another Police song from Los Mocosos? And where on earth is the label’s hero, Cheb i Sabbah?