So you mean when stressed out music sounds bad. Correct? And in those times, the pulse is high? So when the pulse is high, or in state of anxiety, people are not in state of acute perception of sound to hear a good represenation of the music?
I really want some studies done one this with medical equipment hooked up. It would reveal so many things.
it's probably not been done, because there isn't any real commercial application currently for that data. be patient...neuroscience is growing huge and at some point someone will do that study. it's possible it has been done but if so it's likely buried in an obscure journal that only the med students among us can access