That’s what reader Mark H says about Beethoven’s Symphony Number 3:
In the finale of Beethoven’s “Eroica” Symphony, there’s a glorious, triumphal gallop which Leonard Bernstein said had “the swagger of a Hungarian cavalryman”. I find myself thinking of it.
Here’s a breakdown of the graphic notation from the YouTube page:
Q: What do the shapes indicate?
A: The shapes are assigned according to an instrumental group:
rectangle: brass (also timpani)
inverted ellipse: oboe and bassoon
Q: What do the colors indicate?
A: The colors are assigned to pitch…
See the explanation here.