Apple recommends AAC/He-AAC audio codec for streaming to iOS devices or Mac machines. Could you please try to playback the same stream via HDS and check if the audio is still choppy?
The HDS stream played on Windows PC doesn't have audio issues. Also the HLS stream played in JWPlayer 6 on Windows PC doesn't have audio issues. The HLS stream audio is chopping only on iOS devices.
As I mentioned, when we use Internap to publish the stream with the same settings there are no issues with the audio played on iOS device although it's an MP3 format. They use FMS also to stream the content.
As for what Apple recommends, if you read this article, you can see that there are no issues with the MP3 format.
I used the MediaInfo tool to compare the video fragments produced by Internap's FMS and our AMS on AWS. In the image below you can see the Internap's informations on the Left side, and ours on the Right. I'm pretty much convinced that this has to do something with the AMS settings.
Am I the first one that has this issue? No one can help me?
I meet this bug. Anyone can help me ?
I too, am seeing this. :-/