Ready made Note/Chord/Scale library?

[Salchicha]

I'm currently working on a T4.1 MIDI sequencer with built in Chord/Scale modes, as someone with little music theory knowledge I'm finding the idea of programming it all in from scratch a bit daunting, does anyone know of any existing code library that I can use that would help with this?

 

[MatrixRat]

This may be worth checking out:-

https://www.arduino.cc/reference/en/libraries/midier/

 

[Salchicha]

Thanks, that looks like it could be useful.