Previously I mentioned the ratios of harmonics and I didnt want to post until I could look them up to make sure I had no typos, anyways the ideal tuning ratios just for discussion and also for reference regarding vocalists' natural harmonies.
Code:
U 1:1
2nd 9:8
3rd 5:4
4th 4:3
5th 3:2
6th 5:3
7th 15:8
O 2:1
now obviously this is too much written information to look at while playing in real-time, though in terms of theory, embedding the relationships of the ratios within the notation somehow, goes a lot further than simple analogies like, "yeah man the devils tone, like, tritone, whoa, sounds evil" or whatever strange unique analogy someone feels like inventing for the supertonic, etc.