Understanding how a signal propagates through a wire or transistor is a slightly, IMO, different scale of understanding than the universe and all of creation.
EDIT: Perhaps another way to put it is just because we don't understand some things, doesn't mean we don't/can't understand others.
I was really referring to more than the signal in the wire. The whole process of listening to sound, processing it in the brain, and how that sound interacts with memories that we all have that are triggered by the tempo and timbre. There is so much more going on when you're listening to music than the sound that is picked up by some meter. I'm not saying it isn't useful to measure things, just that they don't tell the whole story.