Not altogether too many nuns on this site but here's one. Emahoy Tsege Mariam Gebru is also a famed Ethiopian composer and pianist who in the mid-1970s made a series of boombox recordings of voice and piano with the backdrop being the political upheaval of the time. A warts and all recording - you can hear birdsong and the creaking of chairs between the notes - sadly Gebru passed away before the album finally got a release to a larger audience.