(Update: added popular mode for Roman numerals, fixed a bug with switching to another song scale)
In response to several discussions relating non-diatonic chords, I made a simplified simulation of what would happen in Hookpad if multiple scales are supported at the same time. It works on Windows machines only, but I could provide the source code if anyone wants to expand upon this demonstration, including the @Hooktheory staff.
- Chords with an altered root do not have striped colour bars as in Hookpad;
- Roman numerals in the popular style apply also to the extensions;
- Chords with a minor third still display the alteration in the seventh anyway, so in C Major, i7 means CmM7, unlike Hookpad where it represents Cm7 (which would be i♭7);
- Both the harmonic and melodic minor scales are in
mode Imode VI, but using the source these scales could be reconfigured to be in mode I instead;
- Currently there is no way to display a dimM7 chord in Roman numerals (it does not matter because no two adjacent scale degrees in any scale may form an augmented third).
- Inversions with correct accidentals;
- Behaviour of other extended chords, with proper Roman numeral spelling;
- Applied chords (would this lead to applied chords on chromatic scale degrees by switching between scales?)