Sketching Page 2 | canbilir.com

https://web.mit.edu/music21/doc/index.html

https://www.scales-chords.com/chord-finder-guitar-piano.php?notes=D;G;A;B&chords=&scales=

http://openmusictheory.com/contents.html

https://esri.github.io/esri-leaflet/examples/

chord identifier