The bug is in Sigil-0.9.3 when you add any existing file (such as an audio file) somethign causes the metadata to be rewritten. I will track down what and get it fixed for the next release.
The best workaround is to add the audio file to the epub2 version BEFORE running ePub3-Itizer.
Thanks,
KevinH
Last edited by KevinH; 03-05-2016 at 06:54 PM.
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