SEPULTURA Roots (2011 German 15-track 2-LP vinyl album - On its sixth album, Brazil's most famous head-banging outfit takes a page from the nu-metal book but, more importantly,combines its brutal thrash-metal sound with indigenous music from its homeland, occasionally utilising the percussion and chants of the country's Xavantes tribe to powerful effect. The biggest standouts are the lively, acoustic-guitar-driven 'Itsari' and the epic closer 'Canyon Jam', both improvisations with Xavantes musicians that make for welcome contrasts to the record's intense bombast. Elsewhere, Brazilian percussionist Carlinhos Brown drives the rhythm-laden 'Ratamahatta', a track that exemplifies the quartet's distinctive brand of 'tribal metal')