def computeStereoSX(self, start=0, stop=None, ):
        fs, data = wav.read(self.files['inputAudioFilename'])
        data = np.double(data) / self.scaleData
        if self.tfrepresentation == 'stft':
            starttime = start * self.stftParams['hopsize']
            if stop is not None:
                stoptime = stop * self.stftParams['hopsize']
            else:
                stoptime = data.shape[0]
            self.originalDataLen = stoptime - starttime