audio-rms
Connect a Web Audio API AudioNode and stream out the realtime RMS audio level.
Install
$ npm install audio-rms
Example
Stereo level meter using html5's meter element.
var AudioRMS = var leftMeter = documentvar rightMeter = document var audioContext = var output = audioContextoutputgainvalue = 04output var oscillator = audioContextoscillatoroscillatorstart // modulate audio levelvar lfo = audioContextvar amp = audioContextlfofrequencyvalue = 1ampgainvalue = 04lfoamplfostart var rms = output rms { if value == null return 0 return Math / 100}