Oooh, neat. That circle-flipping thing might well solve my problems. As to the arc thing: I had been thinking in terms of a section going out from the center, but what you have there is interesting. I was messing with trying to edit points, and not successfully getting lines to be smoothly-curved be...

Long story short: I want to make some animations which are synchronized with music, and which are animations of roughly what the music looks like to me (I'm mildly synaesthetic). This is pretty far from the sorts of things that I mostly see people talking about doing with stuff like animation studio...