Unfortunatly dont have the time to read all the replys but i have always thought the exact same as you. And from either listening or playing around 4
hours of music a day(on average) I can vouch that its so true.
Some sceintist should look into this type of thing further its a real pity its been overlooked for so long.
Music effects emotion and body changes. I don't know if that's really metaphysical ... or just a natural thing happening that we don't totally
understand yet.