Thank you for checking. I've not checked too many different browsers until your comment.
It's working for IE, Chrome, and Firefox on computer. It's also working on android devices.
However, it's not working on apple devices.
Thank you for narrowing down the problem. This is really unfortunate because most parents/students here have iphones and I must get it working for that.
I've checked the MIME types and those are set up correctly.
I've also checked out some posts on the forums here and will try some things mentioned.
-I've tried converting the files myself (rather than having construct do it). Didn't work.
-I've tried removing the offline.appcache (and editing the index.html) and that didn't work either.
-I've tried both Chrome and Safari on several iphones (thinking that it might be a safari problem). The problem persisted on both browsers.
Now I'm going to try downgrading the audio quality and try that.
Side question: Is there a recommended plug in for construct that could help with audio and perhaps help in this situation?