Thread:Reveal.js (2)

Reveal.js has a wide range of useful features which include
 * nested slides
 * nice slide tansition customization
 * markdown contents
 * PDF export
 * speaker notes(useful if author is giving a live presentation)
 * a nice API to do things easily

It does have automatic slide transitions at specific interval of time. For linking it with audio position, I'd be using Popcorn.js similar to way its being done in the prototype, but with easy authoring of course.