more modes?

[stevengj]

I only see one major mode and 3 minor mode built-in here.

It would be nice to see more modes implemented (the modes of the diatonic scale, e.g. dorian, lydian, etcetera, along with ionian_scale = major_scale and aeolian_scale = natural_minor_scale synonyms), along with others (harmonic major, phrygian dominant, etcetera). But there are so many that it might be more natural to have a dictionary modes["lydian"] than a separate constant for each.

(It's also not clear to me why a Scale should be an iterator rather than something supporting getindex.)

[dpsanders]

That's a great idea, thanks!
Do you have a reference with a list of modes?

[stevengj]

Wikipedia is probably a decent source — it has articles on pretty much all the common modes, I think, though I don't know if they are listed in one place? A lot of them are listed in the Mode (music) article on Wikipedia. If you google "7 diatonic modes" that would be the most basic starting point.

[stevengj]

Then there are also scales that have < 7 notes, like pentatonic scales, and scales that have > 7 notes, like the nonatonic blues scale (or for that matter the chromatic scale, but I don't know if people refer to the chromatic scales having particular tonic roots).