who the hell is duc? :enbyfied: :verifiedcat: (@duc)

is there a one-page(!) website where one can basically just click on a musical note, on major/minor/other types of scale, and it just displays the list of notes and chords (and maybe other info?) in said scale? it feels like a 1-page solution is pretty doable because of how pattern-based scales and chords are, and would make it a lot simpler to look this kind of stuff up.