Tanzanian musicians Nay Wa Mitego, Rostam, Profesa Jay have long warned of political unrest

Roma Mkatoliki (L) Nay Wa Mitego and Roma Shormbwezi (R) (Photo: Courtesy)

As protests sweep across Tanzania following disputed election results, the country's streets echo with chants of anger, and the unmistakable rhythm of rebellion.

But long before the crowds took to the streets, Tanzanian musicians had already been fighting their own war, one waged through lyrics and melody.