The central point of the article (taken from the actual paper) is based on a false assumption. We can easily differentiate between the colors of the rainbow: RO

The central point of the article (taken from the actual paper) is based on a false assumption. We can easily differentiate between the colors of the rainbow: ROYGBV. That is 6 colors. If you divided the human auditory range into 6 parts and named them (super low, low, mid low, mid high, high, super high), I think you'd see very similar performance. Further, the "FFR" they claim as a good predictor isn't even that good if you look at the numbers given in the paper.