When Six Degrees curates collections of mind-expanding and culturally enriching compositions, rather than too-clever covers comps, we all reap the benefits. This double-disc set opens with Niyaz, led by singer Carmen Rizzo, whose spellbinding voice blends perfectly with their Middle Eastern-meets-Indian meditation, before MIDIval PunditZ offer up “Rebirth,” a smooth, dubby track featuring the elevating sitar-playing of Anoushka Shankar. The Bombay Dub Orchestra brings a trip-hop beat into the picture, but keeps the sitar prominent on Thievery Corporation’s remix of their track “Feel.” It’s a veritable Six Degree all-stars game, with Karsh Kale, Banco de Gaia, and Cheb i Sabbah stepping up and knocking ’em out of the park.