[parkellipsen]

Hi,

so, I've recently discovered that the Thorium reader application (and possible others) support media overlays that allow you to synchronize audio narration with the text.

I succesfully managed to assemble an EPUB3 book with an audio narration layer using Sigil.

Now my question is, does the standard allow to add multiple overlays for the same text passage ? The <par> tag allows only a single <audio> tag inside, and nesting <seq> tags in one <par> doesn't work. I neither found a way to add multiple SMIL definitions for the overlays.

I haven't found anything that'd explicitly forbid adding multiple overlays. Can anyone enlighten me whether that's possible within the standard ?

Best,
n