I guess it would depend on what type of music and your own personal relations to it.
When I hear music, I tend to associate movement with it, so when visualizing music in a comic, I would likely to have some type of movement with it. Some examples that I could find quickly (I don't know enough webcomics to name any)
But then, it's different from person to person. There's people who associate specific notes with specific colours. For them, it would be better to vary the colour of the words depending on what note you want it to represent. Other's might find it more like a hand grabbing their ear and dragging them away.