Follow the instructions (Tap the ? question mark)
In iReal b, you need to turn OFF background audio (this is the first step in the instructions.)
Make sure you press Play on the Player (second step) ... if you miss out this step it will probably not work - pressing play activates the code behind background audio. Amplitube has background audio ON.
Also update the iOS.
Once it is working, you can remain in iReal b to change songs and activate the player.
I will delete your duplicate post.
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