Your comments

Thank you for your answer Gil. I am testing "imperfect solution" via server API that you wrote. I have some troubles with it:
1) I made testing scene with mngAddScene with my own text filled in. I can see this new scene in administration and when I test it on desktop it works fine.
2) I tryed to play this scene on iPhone but I got this error "The requested URL was not found on server ....".
3) I have clicked on "edit scene" in administration, then clicked on "Audios" tab and I can see audio line with text I made in step 1. It looks already chosen but I clicked it anyway and then I have saved this scene.
4) now I tryed it on iPhone and it works fine.

I need it to work without step 3... Can you help me please?