Refs: - [How to Control the LEDs on a Novation Launchkey Mini II - Parts Not Included](https://www.partsnotincluded.com/midi/how-to-control-the-leds-on-a-novation-launchkey-mini-ii/) - [Web MIDI API](https://webaudio.github.io/web-midi-api/#dfn-open-the-port) - [Programmers ref.pages](https://d2xhy469pqj8rc.cloudfront.net/sites/default/files/novation/downloads/10535/launchkey-mk2-programmers-reference-guide.pdf)
