This was the third rewrite of the MVP which enabled properly formatted notations according to different beats.
The app is built using a single page Clojurescript stack, and the Canvas frontend uses the Quil project.
I also released two open source libraries. The first enables other developers to specify notations( and import or export composition s) in a standard spec . The second enabled users to view compositions in an open source tool so that there is no data lock in.