AVFoundation.framework/Frameworks/AVFAudio.framework/Headers/AVAudioTypes.h
/*! @typedef AVAudioFrameCount @abstract A number of audio sample frames. @discussion Rationale: making this a potentially larger-than-32-bit type like NSUInteger would open the door to a large set of runtime failures due to underlying implementations' use of UInt32. TODO: Remove rationales. */ typedef uint32_t AVAudioFrameCount;