Two examples from Parchman Farm, “the oldest prison and the only maximum security prison for men in the state of Mississippi”, according to WP:
The first one is by Henry (Jimpson) Wallace, and the second one is by Dan Barnes and “unidentified prisoners”, according to the Cultural Equity page, where you can find other recordings. See the source of the picture above for a quote about Parchman Farm.
A happier example from Tanzania:
Frank Gunderson, who made this recording, asks, “How do people from around the world draw the line between work and play?”, and quotes one of the workers:
Without the music you just get tired, it is as if you are being tortured.