In testing apps for the latest iOS 5 beta, I've found that audio recording in M4A / AAC is silently failing.
A small file is always created of the same size all the time [57344 bytes] , but with no audio.
Recording in this format has always been possible before iOS 5.
To test, try changing the recording format and compression values in the KS sound_record.js demo to :
This has been tested on an iPhone 4 and iPad2 running iOS 5.0 (9A5274d)
Any ideas? This is critical fo alot of my apps to work.