[tomphoolery]

OK so how do I make this control an LFO in my music? ;)

[alexweber]

Well, I suppose you could use the Web MIDI API: http://webaudio.github.io/web-midi-api/

Although if you need to route it to an external (non-browser) output, you might consider using OSC. There appear to be multiple implementations, but here's one: https://github.com/marmorkuchen-net/osc-js