Writing Music in JavaScript

I invite all lovers of electronic music and programming to play in the synthesis of tunes using Code Music Studio .
The bottom line is:
You need to create a function that takes a time argument and returns an amplitude in the range from -1 to 1, for example:

var n = 0;
return function (t) {
    var x = Math.sin(t * 256 + Math.sin(n));
    n += Math.sin(t);
    return x;
}

[listen]

You can take as a basis something from studio.substack.net/-/recent
for example polytropon , SuperMario .

Under the hood:
github.com/substack/code-music-studio
Uses the baudio audio API .
Graphics - SVG, rendered using the amplitude-viewer module .
As the http server NodeJS http API , and ecstatic for statics.

And finally, a little video (in English):