index.js

try{
	window.AudioContext = window.AudioContext || window.webkitAudioContext
}catch(e){
	alert("Web audio API is not supported in this browser")
}

try{
	navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia
	var hasMicrophoneInput = (navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia)
}catch(e){
	alert("getUserMedia() is not supported in your browser")
}

var bufferSize = 1024
var audioContext = new AudioContext()

socket.on("mic", function(msg){
	//console.log(msg)
	var source = audioContext.createBufferSource();
	source.connect(audioContext.destination);

	array = new Int8Array(msg.data);
	abs = new Float32Array(msg.data);
	arrays = new Float32Array(abs.length);
	
	ab = audioContext.createBuffer(1, array.length+1, 44100);
	ab.getChannelData(0).set(arrays);
	source.buffer = ab;
	source.start(0)
})

function myPCMFilterFunction(inputSample) {
	var noiseSample = Math.random() * 2 - 1
	return inputSample + noiseSample * 0
}

var myPCMProcessingNode = audioContext.createScriptProcessor(bufferSize, 1, 1)
myPCMProcessingNode.onaudioprocess = function(e){
	var input = e.inputBuffer.getChannelData(0)
	var output = e.outputBuffer.getChannelData(0)
	for(var i = 0; i < bufferSize; i++){
		output[i] = myPCMFilterFunction(input[i])
	}
	
	socket.emit("mic", output)
}

var errorCallback = function(e){
  alert("Error in getUserMedia: " + e)
}

navigator.getUserMedia({audio: true}, function(stream){
	var microphone = audioContext.createMediaStreamSource(stream)
	microphone.connect(myPCMProcessingNode)
	myPCMProcessingNode.connect(audioContext.destination)
	//microphone.start(0)
	var gainNode = audioContext.createGain()
	myPCMProcessingNode.connect(gainNode)
	gainNode.connect(audioContext.destination)
	gainNode.gain.value = -1 //Mute the audio here so I can hear if I am playing the audio that im receiving
}, errorCallback)