Progression.fromRomanNumerals doesn't respect major/minor

[tmelz]

tonal.Progression.fromRomanNumerals("C", ["ii"])

and

tonal.Progression.fromRomanNumerals("C", ["II"])

both output

['D']

[danigb]

Well, I guess this is intended. The rationale is that chord symbols always uses a uppercase letter for the note name. So minor D is "Dm" or "Dm7".

In theory we could convert any "ii" to "m" or "m7"... but which one?

A possible solution is to convert "ii" string to "IIm7" before using fromRomanNumerls (and the same for any other minor chord)

Do you have any other suggestion?

[jrsquared]

In this example ii would convert to Dm, for a minor seventh chord, you would notate it as ii7

This is fairly common. Examples from a quick google search:
https://learnmusictheory.net/PDFs/pdffiles/01-05-02-RomanNumerals.pdf
https://viva.pressbooks.pub/openmusictheory/chapter/roman-numerals/
https://blog.flat.io/update-in-the-roman-numerals-input-system/