To all but the hardcore followers of Algerian music, the names of the performers on this double-CD set will mean nothing. But to those who love (or want to discover) the roots of modern Algerian music, these 30 tracks, culled from the vaults of Algerian radio, are a treasure trove. From the sha'bi (or chaabi) style, the people's music with its accessible sound and sweeping lyrics, and frequent guitar accompaniment, or the roots of the better-known rai, the hawz, or the folk Kabyle style, which was revitalized after the Second World War (well-represented here by Slimane Azem, this covers a very wide and gratifying range). Probably the only familiar track here is the stirring "Ya Rayah," which was covered in the mid-'90s by Rachid Taha, although in its own way, the original rocks very hard. But never mind the unfamiliarity; this is all remarkable stuff indeed, performed with a rare fire and grace.