That’s a good place to start building intuition, but it can also distract you actual understanding. What that visualization really is is a bunch of arbitrarily

That’s a good place to start building intuition, but it can also distract you actual understanding. What that visualization really is is a bunch of arbitrarily bounded Fourier transforms of little windowed slices of a piece of music. The true Fourier transform of a time bounded piece of music is a single unbounded function over an infinite frequency spectrum.