It’s been said “that music is one of the few activities that involve using the whole brain”. Do you know of any others?
The actual study does not quite make the claim that your link does. Wide networks involved in music, yes. Claims of “whole brain”? No.
Hard to prove but some speculate that the sense of a sense of self, requires some coherence between wide areas of cortical processing. Hence the findings that psychedelic trippingwith its out of body sensations is associated with a decrease in the normal levels of coherent activity between wide brain area. The point is that we are apparently in the ongoing process of experiencing a percieved reality as an individual, using our whole brain in a coordinated way. Make those connections less active and our experience of reality gets a bit wild.
Music is not special. Probably virtually everything we do involves the whole brain to some extent. Some parts will be more involved and active than others, but really no part of your brain (unless you are going down to a very low level of individual neurons, for short periods) is ever completely inactive.