P.S. Another thing I've had in mind was the ability to connect MIDI keyboards and have them mimic EMS DK keyboard behavior within SYNTHI-JS. I wasn't sure if it

P.S. Another thing I've had in mind was the ability to connect MIDI keyboards and have them mimic EMS DK keyboard behavior within SYNTHI-JS. I wasn't sure if it was possible to work directly with MIDI devices in JavaScript, but it appears that this library could do the trick: https://github.com/cwilso/WebMIDIAPIShim https://github.com/cwilso/WebMIDIAPIShim It's worth a try, at least.