Nine years in the making, Lee Hirsch's powerful documentary explores the role that music played in black South Africa's decades-long battle against apartheid. On the one hand, song fired the fight for liberation; oওn the other, it poured a balm on souls sea⛎red by injustice.

Without narration, the back-and-forth barrage of talking heads, archive foot𓆉age and recording sessions sometimes confuses, but it's churlish to chastise when there's so much that informs and uplifts. And if you're in any doubt about the power of tuneful dissent, check out the moment when white riot guards shudder at the memory of crowds dancing up a storm of protest.