Frequency Modulation Synthesis
Control modulator frequency
Control index of modulation
Put these files on some other machine. Then send a stream of messages to the server. For example, use the HyperIMU app. Any app that streams sensor value to a user selected IP and port is fine.
In order to run this online, you need the SSE to run on the appropriate port (80 for http, 443 for https). If you are running this js client code locally it doesnt matter though.