Documentary on the canto cardenche, an a capella song tradition of cotton farmers and miners in the arid Laguna Region of northern Mexico, now on the verge of extinction. Includes music by Juan Pablo Villa, Los Cardencheros de Sapioriz, Los Cardencheros de La Flor de Jimulco, and others.

Documentary film follows Mark Johnson and Jonathan Walls from post-apartheid South Africa, through the ancient sites of the Middle East, to the remote beauty of the Himalayas and beyond. They filmed and recorded more than 100 musicians, largely outdoors in parks, plazas and promenades, in doorways, on cobblestone streets and amid hilly pueblos. Each captured performance creates a new mix in which essentially the artists are all performing together,...