How to get all chord types using RomanNumeral.get and a Key signature

[ReneDiazDiversity]

A problem I am having. I was going to use the roman numerals to get chords.
Example
Key "C", Imaj, iimin7, bIIImin7b9, viimin7b5b9 returns: C, Dmin7, Ebmin7b9, Bmin7b5b9
or
getMyChord("C", "II9"); // returns "Dm9"
or
or getMyChord("C", "IIm9"); // returns "Dm9"

But it seems the RomanNumeral.get only does 7 chords not even triads.
Then I was going to use the Key.majorKey which has amazing features but that also seems to only pull 7 chords

Again I basically want to use a key signature and then use roman numerals and chord types to call up chords and play them. for example in the key of C IMaj7 IVMaj7 and V7 for C Maj7 FMaj7 and G7

And also have it play the chords as arpeggios. But none of this is working.

Any help will be great.

[mrjacobbloom]

Does this help with the roman numerals part of your question? #296 (comment)

[ReneDiazDiversity]

It didn't work 😦
We tried to get the key, Key.majorKey("C")
https://github.com/tonaljs/tonal/tree/main/packages/key
and Scale
https://github.com/tonaljs/tonal/tree/main/packages/scale
and for the chord root we tried both below
intervals: ["1P", "2M", "3M", "4P", "5P", "6M", "7M"], Which I was hoping would work.

and tried
grades: ["I", "II", "III", "IV", "V", "VI", "VII"],

Intervals = 1P for C
to play a C major9 chord
{
type: 'chord',
notation: 'note',
chord: {
type: 'maj9',
intervals: '1P',
},

gradess = I for C
to play a C major9 chord
{
type: 'chord',
notation: 'note',
chord: {
type: 'maj9',
gradess: 'I',
},

None of them worked 😦

[ReneDiazDiversity]

It didn't work 😦
We tried to get the key, Key.majorKey("C")
https://github.com/tonaljs/tonal/tree/main/packages/key
and Scale
https://github.com/tonaljs/tonal/tree/main/packages/scale
and for the chord root we tried both below
intervals: ["1P", "2M", "3M", "4P", "5P", "6M", "7M"], Which I was hoping would work.

and tried
grades: ["I", "II", "III", "IV", "V", "VI", "VII"],

Intervals = 1P for C
to play a C major9 chord
{
type: 'chord',
notation: 'note',
chord: {
type: 'maj9',
intervals: '1P',
},

gradess = I for C
to play a C major9 chord
{
type: 'chord',
notation: 'note',
chord: {
type: 'maj9',
gradess: 'I',
},

None of them worked 😦