Here is a fascinating list of record labels which published songs from Ethnic groups around the world.
https://web.archive.org/web/20041211181248/http://ethnomusicologie.free.fr/labels.html
Daily Archives: June 6, 2021
Audio CMS for archives
I must say this open source solution looks amazing and I need to try it out!
http://telemeta.org/category/projects.html