well, I for one don't get the callbacks to work in iOS. You could ask support at runrev.com.So then I can't do callbacks? How do I highlight the words of my storybook app as they are read?
If callbacks don't work in iOS you could do the following (hack/workaround alert)
Take your soundfile in Livecode in the player that has the callbacks set. In your callback handler your could collect the milliseconds from start for each consecutive callback. This gives you a list of the callbacks in milliseconds. You could then in iOS start the sound and at the same time use your list of known milliseconds from start to hilite a word. Like in the send in time examples you were doing. Either you do the difference in the list and issue a "send "hiliteWord 3" to field xy" in xxx milliseconds. I did not test this but it probably would work. Not nice but if your project depends on it you might as well try it.
Kind regards
Bernd