Awesome! I have an old project that generates ABC music notation. I made a context-free grammar to transform plain melodies into bluegrass banjo style. The output can be played & edited in Composing Studio: https://rrherr.github.io/banjo-grammar/

For example:

    T:Happy Birthday, bluegrass banjo style
    %%MIDI program 105
    K: G
    L: 1/16
    Q: 140
    D2 D2 E4 D4 G4 F8 D2 D2 E4 D4 A4 G8 D2 D2 d4 B4 G4 F4 E4 c2 c2 B4 G4 A4 G8
    Dd Dd Edgd Ddgd Gdgd FdgFdgFd Dd Dd Edgd Ddgd Adgd GdgGdgGd 
    Dd Dd ddgd Bdgd Gdgd Fdgd Edgd cd cd Bdgd Gdgd Adgd GdgGdgGd