The Toba are an indigenous group from Argentina, Bolivia and Paraguay. The Argentian band Tonolec plays tribute to them by mixing some of their traditional songs with Electronic music, producing one of the most inspiring fusions I've heard recently.
Charo Bogarín, the singer, has Guaraní origins. She formed with Diego Perez the band Tonolec in 2002. In 2005 they released their first album, named after the band.