I've read the article and I don't think it has much to do with listening to music. The article says that when our eyes shift focus then something happens to our ear drums simultaneously. One eardrum moves further in and the other moves further out. Nobody has any idea really why this is happening but there is a theory (aka a wild stab in the dark) that this somehow helps us to determine if what we're looking at is making a noise.
It must have been known for ages that when you close your eyes you sharpen your hearing. This is because there is a switch at the top of the spinal chord that all sensory input comes through. It's called the ascending reticular formation and what it does is pretty impressive, at least to me.
You're not aware of this but the brain can't really handle the input from 2 of the senses at the same time. So this switch is very quickly switching between each sense. The sense that takes the most processing power and gets the main priority is your sight. If you close your eyes then you're allowing your hearing to get a lot more brain time and so it will sound better because your eyes aren't constantly butting in.
The switch also handles you going to sleep by simply switching off all sensory input so you can dream. However, it's still monitoring your senses so that if there's a strange sound or whatever, it'll decide to wake you up.
LSD works by messing around with this switch. The effect of LSD is to allow more than one sense to hit the brain at the same time. This is why colours will seem to have sounds etc. Your brain can't really handle it all so it comes up with all sorts of weird ideas to try to make sense of it.
There you go, my degree wasn't wasted after all