Directory of open access journals page for music. If you're not familiar with what DOAJ does, it lists freely available scholarly journals.

While you might not be too bothered about the scholasticism of a journal, or have quite justifiable doubts about the role of peer-review in reinforcing current academic thinking to the detriment of either new or non-conformist ideas and theories, the information you find in this type of source is considerably more likely to be reliable than your average search result from Google.

This is a page of music journals, currently with 12 listings, including journals covering 17th C music, ethnomusicology, electronic music, and a music theory journal.

And you don't have to buy access, or have access to a subscription via an organisation. Which is good.