Here's info from Music by Prudence Web site:
"Music by Prudence" – a documentary. Zimbabwean singer songwriter Prudence Mabhena (pictured), age twenty-one, was born severely disabled into a society where disabilities carry the taint of witchcraft; she is more likely to spend her life hidden away in a tiny hut than on a stage in the center of a city. Her story is the story of many of the disabled kids of Africa, a story of abandonment and abuse. But Prudence and her seven young band members, all disabled, have managed to overcome stereotypes and inspire the same people that once saw them as a curse.
HBO Documentary Films picked up Music by Prudence for distribution.
MUSIC BY PRUDENCE (2010) · USA/Zimbabwe · 32:30 minutes · director: Roger Ross Williams · cinematography: Errol Webber, Derek Wiesehahn · film editor: Geeta Gandbhir · music producer: Ted Mason · producer: iThemba Productions Inc./Roger Ross Williams · co-producer: Patrick Wright · distributor: Home Box Office (HBO).