ap_ExtendedAudioConversion_07.m

void SetUpAudioDataSettingsForOutputFile (AudioConverterSettings *outAudioConverterSettings) {
  outAudioConverterSettings->outputFormat.mFormatID = kAudioFormatLinearPCM;
  outAudioConverterSettings->outputFormat.mSampleRate = outAudioConverterSettings->inputFormat.mSampleRate;
  outAudioConverterSettings->outputFormat.mChannelsPerFrame = outAudioConverterSettings->inputFormat.mChannelsPerFrame;
  
  if (outAudioConverterSettings->outputFormat.mFormatID == kAudioFormatLinearPCM) {
    // if the output format is PCM create a 16-bit int PCM file format description as an example
    outAudioConverterSettings->outputFormat.mBitsPerChannel = 16;
    outAudioConverterSettings->outputFormat.mBytesPerFrame = outAudioConverterSettings->outputFormat.mBitsPerChannel / 8 * outAudioConverterSettings->outputFormat.mChannelsPerFrame;
    outAudioConverterSettings->outputFormat.mFramesPerPacket = 1;
    outAudioConverterSettings->outputFormat.mBytesPerPacket = outAudioConverterSettings->outputFormat.mBytesPerFrame * outAudioConverterSettings->outputFormat.mFramesPerPacket;
    outAudioConverterSettings->outputFormat.mFormatFlags = kAudioFormatFlagIsBigEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
  } else {
    NSException* exception = [NSException
            exceptionWithName:@"AudioFormatNotSupportedException"
            reason:@"Audio Format Not Supported"
            userInfo:nil];
    [exception raise];
  }
    
  return;
}