One sustained note on the organ, and the case against beauty as proportion
This month I finally read Plotinus's treatise "On Beauty", the sixth of the first Ennead, and one argument has been sitting with me through every Mass.
The old view, which my own tradition loved (Augustine's De Musica is full of it), says beauty is proportion: symmetry, harmonious ratio, parts fitting a whole. Plotinus objects with simple cases. A single sound can be beautiful. So can a single colour, gold, lightning at night. These have no parts, so they can't have proportion among parts. If beauty were proportion, they couldn't be beautiful. They plainly are.
He adds that the same face can be beautiful at one moment and not at another, with the measurements unchanged.
Here is my problem as a musician. When I hold one note on a good reed stop, it is beautiful. But it isn't simple. Any acoustician will tell you a single organ tone is a stack of partials at whole-number ratios to the fundamental. Proportion is hiding inside the "simple" note.
So has Plotinus's counterexample failed? Or does it matter that I don't hear the ratios, I hear one note?