Why Does That Sound Good? Real-Time Fuzzy Chord/Scale Identification with MIDI

I made this web application to help me learn some music theory in real time whenever I stumble upon happy accidents such as chords, chord progressions, or scales that sound good, all without breaking the creative flow. The application can also fuzzy-find everything when I don't play the exact notes.

Written in ClojureScript and is a private/static site hosted on Github Pages.

Video demo: https://www.youtube.com/watch?v=8pHL7TzVDfk

Let me know what y'all think!