[This is another post that has been sitting in my drafts too long.]
When I was a kid I had a doctor's appointment where they helped determine how severe my cerebral palsy is. They pulled out this metal box with wired pads connected to it, put said pads on my legs and you could hear my muscles firing.
Guess what my amp can do?!? It's not the same, you only hear constant static [and not each tremor] but there's a difference pitch/tone [I should learn what these words mean] when you compare how my wrist sounds next to my ankle.