Проигрывание AudioBufferList с использованием AVAudioEngine с некоторым эффектом

Question

Можно ли предложить способ воспроизведения AudioBufferList, хранящегося в кольцевом буфере, с использованием AVAudioEngine.

- (void)configureAudioEngine {

    engine = [[AVAudioEngine alloc] init];
    playerNode = [[AVAudioPlayerNode alloc] init];
    [engine attachNode:playerNode];


    AudioUnit outputUnit = engine.outputNode.audioUnit;

    OSStatus err = noErr;
    AudioDeviceID outputDeviceID;
    UInt32 propertySize;

    AudioObjectPropertyAddress propertyAddress = {
        kAudioHardwarePropertyDefaultSystemOutputDevice,
        kAudioObjectPropertyScopeGlobal,
        kAudioObjectPropertyElementMaster };
    propertySize = sizeof(outputDeviceID);
    err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &propertySize, &outputDeviceID);
    if (err) { NSLog(@"AudioHardwareGetProperty: %d", (int)err); return; }

    err = AudioUnitSetProperty(outputUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &outputDeviceID, sizeof(outputDeviceID));
    if (err) { NSLog(@"AudioUnitSetProperty: %d", (int)err); return; }


    AudioUnitInitialize(outputUnit);

    AVAudioUnitDistortion *distortionEffect = [[AVAudioUnitDistortion alloc] init];
    [engine attachNode:distortionEffect];
    [engine connect:playerNode to:distortionEffect format:[distortionEffect outputFormatForBus:0]];
    mixer = [engine mainMixerNode];
    [engine connect:distortionEffect to:mixer format:[mixer outputFormatForBus:0]];
    [distortionEffect loadFactoryPreset:AVAudioUnitDistortionPresetDrumsBitBrush];
    NSError *error;
    if (![engine startAndReturnError:&error])
        NSLog(@"Can't start engine: %@", error);


}

я просто хочу воспроизвести audioBufferList из

 - (void)captureOutput:(AVCaptureOutput *)captureOutput
    didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
           fromConnection:(AVCaptureConnection *)connection
    {
        AudioBufferList *abl =  [self MakeAndAllocateAudioBufferList:sampleBuffer];
       //
    }

Этот буфер будет добавлен в RoundBuffer и хотите играть с использованием AVAudioEngine.