On the heels of Mickey Hart’s acclaimed Global Drum Project album comes The Mickey Hart Collection, a series focusing on landmark world music albums masterminded by the Grateful Dead percussionist. Diga, by the Diga Rhythm Band, was originally released on The Grateful Dead’s label in 1976, was the first collaboration between Mickey Hart and Zakir Hussain, and can be seen as the first step on the road to Planet Drum. Diga is a classic world-music album in its own right, with special guest Jerry Garcia on two tracks.