This is a song from Amadou & Mariam, musical duo from Mali, formed in 1974. Amadou lost his vision at the age of 16 while Mariam became blind at age 5 as a consequence of untreated measles[wiki]. Here’s their nice song “Sabali“, a world music classic:
World Music - the Music Journey 
More people need to experience Amadou and Mariam. When I first started listening to them I was overwhelmed by their large body of work. They really are quite special. THanks for sharing.
they are really special and have special skills!! E.g. Remember, Mariam is blind!
Amazing. I need to listen more of their beautiful music.
Thanx Xandi :)
thanks Marcos, you really should, there are some more great songs! Thanks!