Im kind of newb to audio processing but have ExtAudioFile converting pcm to kAudioFormatMPEG4AAC and if i save the file as .caf it plays fine. but not as .m4a (on desktop)
looking at the audio file it seems the header doesnt match another .m4a header and seems very short and has 'caaf' in it. my guess is it might be mpeg4aac data but the header isnt right for a proper .m4a file
so my question is, what do i need to do on iphone to further process this in a proper .m4a file?