Here’s a link to an online journal produced by the Department of Ethnomusicology at the University of Bamberg in Germany.
Many of the posts are related to indigenous music. This particular link is to an edition called “Indigenous Peoples, Recording Techniques, and the Recording Industry” and the articles provide ethnographic information on a wide range of aboriginal musical initiatives from many countries – the Sami in Scandinavia to Fijian societies to North American aboriginals.
The website provides summaries of each article but full copies are not available on this site; some can be found on the web and others I was not able to track down. However, it is a great place to get ideas about ethnomusicology and to get exposure to aboriginal cultures that you may not have been familiar with before.