Running PTP RC1 (haven't installed RC2 yet: in the middle of a project)
I've built an audio button into the tour that starts a voice over. It works on desktop and on android, but I get no audio playback on iPad (don't have an iPhone to test). Here is the link:
Tested on iPad 3 Safari7 + Chrome/Firefox PC with ?html5=only and all works. HTML5 player need to load the sound on demand so sound can be played with delay.