AudioQueuePrime Fails with -66674

I have some code which does recording/seeking/playback using AudioQueue using either PCM or IMA4. Now this code is working fine on the simulator but when it's time to use on the iphone playback gives the error -66674 on AudioQueuePrime. I am mostly curious as to what are possible causes to this error as the documentation leaves much to be desired.

I've linked the relevant documentation below, this is done on iphone-sdk-4.0 and again simulator works fine but the device returns this er开发者_Python百科ror. I've tried to let AudioQueuePrime prepare all frames as well as requesting a single frame.

http://developer.apple.com/mac/library/documentation/MusicAudio/Reference/AudioQueueReference/Reference/reference.html#//apple_ref/c/func/AudioQueuePrime

From the header file here: /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/System/Library/Frameworks/AudioToolbox.framework/Headers/AudioQueue.h

We see: kAudioQueueErr_PrimeTimedOut = -66674 which can be found at the documentation. It says:

During a call to the AudioQueuePrime function, the audio queue’s audio converter failed to convert the requested number of sample frames.