Okay, I can place the file now (mp3), but when I export to EPUB, it's not there ...
What device/EPUB reader are you using to view the EPUB file with the MP3? Not all readers support it. For example, it should work on iBooks on an iPad or iPhone.
Thanks for your response.
I'm using iBooks on the iPhone.
Actually, I figured this out. This page was very helpful:
Essentially, you have to manually add the audio capability by directly editing the relevant xhtml document.
Is there an easier way?
I just tried it with CS6 8.0.1 and iBooks on the latest iPad, and it worked without having to edit the XHTML.
I placed a headline ("VIDEO"), followed by an MP4 video, followed by "AUDIO", followed by an MP3 audio onto a page.
I used the Media panel to choose a skin for the movie and checked the Show Controller button. I gave the audio a default preview appearance.
I used the Articles panel to choose export order, but set everything else as default, exported as EPUB 2.01.
I copied to iTunes and synced it to my iPad.
Both video and audio played the first time:
In CS5 and 5.5, the video and audio elements weren't correctly written into the XHTML but it seems to be working fine for me in CS6 8.0.1