Garbled iPhone5 playback about novocaine HOT 3 CLOSED

AudioFileReader *fileReader = [[AudioFileReader alloc]
                               initWithAudioFileURL:inputFileURL
                               samplingRate:_audioManager.samplingRate
                               numChannels:1];

[fileReader play];
fileReader.currentTime = 0.0;

_loopLength = [fileReader getDuration] * _audioManager.samplingRate;

float data[_loopLength];
[fileReader retrieveFreshAudio:data
                     numFrames:_loopLength
                   numChannels:1];

_loopBuffer->AddNewFloatData(data, _loopLength);

[self startPlayback];

    // Arbitrary buffer sizes that don't matter so much as long as they're "big enough"
    self.outputBufferSize = MAX_LOOP_LENGTH;
    self.numSamplesReadPerPacket = MAX_LOOP_LENGTH;
    self.desiredPrebufferedSamples = self.numSamplesReadPerPacket*2;
    self.outputBuffer = (float *)calloc((int)self.outputBufferSize, sizeof(float));
    self.holdingBuffer = (float *)calloc((int)self.desiredPrebufferedSamples, sizeof(float));