Should be definitely doable and fairly easy afaik. Quick google search also reveals a few libraries [0] that should help. [0] https://www.npmjs.com/package/mi

Should be definitely doable and fairly easy afaik. Quick google search also reveals a few libraries [0] that should help. [0] https://www.npmjs.com/package/midi-writer-js https://www.npmjs.com/package/midi-writer-js