"neumes" is not a valid xhtml tag (and "font-family" is not a valid css selector). That's not how you go about applying embedded css fonts to xhtml. Another relevant factor would be the manifest entries for the font files in the opf.
This is not a Sigil problem, this is a general epub problem.
Last edited by DiapDealer; 10-18-2021 at 08:33 AM.
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