def stereo2mono(x):
	if x.ndim==1:
		return x
	else:
		if x.ndim==2:
			return ( (x[:,1] / 2) + (x[:,0] / 2) )
		else:
			return -1
CNNMRF http://arxiv.org/pdf/1601.04589v1.pdf
dataset/ETHPy150Open tyiannak/pyAudioAnalysis/audioBasicIO.py/stereo2mono--crossover with--dataset/ETHPy150Open awentzonline/image-analogies/image_analogy/losses/mrf.py/mrf_loss