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• I noticed that I needed to call RequireScript to load Aurora, since it was built with browserify.  Since there's still a use case for loading old-style JS even in a fully modular codebase like this and RequireScript is not SphereFS compliant, I added FS.evaluateScript to fill the gap.
• SoundStream#bufferSize is in bytes and therefore requires the caller to know the sample rate, channel count, etc. to know how much audio is buffered.  As the main use case is just to monitor to stream to prevent underrun, I replaced it with SoundStream#length which is in seconds.

// calculate the current VU for this frame (for visualization)
let amplitudeL = from(samples)
	.where((v, index) => index % 2 == 0)
	.reduce((a, v) => Math.max(Math.abs(v), a), 0.0);
let amplitudeR = from(samples)
	.where((v, index) => index % 2 == 1)
	.reduce((a, v) => Math.max(Math.abs(v), a), 0.0);
this.vu1 = (amplitudeL + this.vu1 * 4) / 5;
this.vu2 = (amplitudeR + this.vu2 * 4) / 5;