I am using Hype to build html5 widgets. So far I have been unable to play audio within the widget. The Hype people have been very helpful, but so far no joy.
Interested folks might like to read the thread at http://hype.assistly.com/customer/portal/questions/179961-audio-via-javascript-t o-be-used-in-a-widget-bound-for-ibooks-author?new=179961
Bottom line is, so far, no audio inside a widget.
You CAN do it via a Keynote presentation.
In my case I'm demonstrating different types of noise (white, pink, brown, grey, blue) and the presentation needs to trigger graphical changes (smartbuilds in Keynote, timelines in Hype) and audio. I can link a graphical change on a "quasi button" to play the sound (sound "build" is play spund WITH graphic change) but it can only be played once - the next click will change slides - keynote is designed to be linear.
BTW, when you export a keynote file as html, (which I am guessing happens when you import a keynote presentation to iBooks Author) the sound file is converted to .m4v, but if you put that "audio-only-movie" in a hype widget, it is not accepted by Author.....
iBook, Mac OS X (10.7.2), iBooks Author
