I got a sound ending in a terrible noise, when played on the Iphone.
Finally i found the right links, explaining and suggesting the solution:
http://www.wooji-juice.com/blog/iphone-openal-ima4-adpcm.html
here something is told about the IMA4 format, and alos how to get it using the terminal window:
afconvert -f caff -d ima4 audiofile.wav
usinf this command i got a sound working normally in my game.
You have to know how to use the terminal in Mac OS (personally i am a Windows user :-)
here is a link explaining how to get in the right directory:
http://macapper.com/2007/03/08/the-terminal-an-introduction/this amounts to:
opening the terminal using spotlight...
cd Desk*
cd FileWithSoundOnDeskTop
and then the command above afconvert
So in the end, all was already on my MACBOOK (with the double booth) only I had to find it...
have fun!