AFRICAN MUSIC "Raise Your Spirit Higher." Ladysmith Black Mambazo. (Heads Up): Timed to celebrate the 10-year anniversary of the end of apartheid, this is the first album of original songs in seven years by the South African vocal group that first gained attention for its collaboration on Paul Simon's "Graceland." But there's nothing remotely complacent about this mostly a cappella program, which makes the harmonic connection between Zulu chanting and American gospel music more apparent -- and uplifting -- than ever before. The title and opening track, a traditional-minded song of triumph whose original title is "Wenyukela," is praise as protest, a reminder that spirituality withers without vigilance. The closing "Tribute" incorporates a hip-hop rhythm longtime leader Joseph Shabalala borrowed from his grandchildren.

And the 5.1 surround mix separates the intricate vocals in a way that allows us to appreciate the sophistication while still admiring the heartfelt sound of voices reaching to heaven. Ladysmith Black Mambazo performs Sunday night at the Troy Savings Bank Music Hall.