requestedAudioFormat
Indicates the audio format in which the client prefers to receive the output sample buffers.
Declaration
var requestedAudioFormat: CMFormatDescription? { get set }Discussion
Must be a PCM format.
The output CMSampleBuffers' CMFormatDescription may not exactly match this format description, but it will match the parts described in the AudioStreamBasicDescription.
Specifying a PCM format is currently required. In the future it may be optional.