We tend to forget that listening to music is a 100% subjective experience, and the state of mind is the key component that dictates the experience.
I find that adding 2+2=4 to be a 100% subjective experience.
Oh wait. I don't. Because I don't make up the meanings behind the numbers or the plus sign operator.
Similarly, I do not make up the sound of a violin vs. a tuba, very loud vs. very soft, etc.