trailingFrames

The number of trailing frames of input audio data required by the converter to perform high-quality conversion. Trailing frames follow, in time, the expected final input frame. Your application should be prepared to provide this number of additional input frames except when using the kConverterPrimeMethod_None value for the kAudioConverterPrimeMethod property. If no additional frames are available in the input stream (because, for example, the desired end frame is at the end of an audio file), then the audio converter synthesizes a sufficient number of silent (0-valued) trailing frames.

var trailingFrames: UInt32