如何在JavaScript中“播放”PCM数据中的声音

Question

我正在构建一个视频应用程序。我使用“getUserMedia”来访问麦克风。我使用以下代码将PCM数据发送到服务器：

	var bufferSize = 4096;

	audioContext = new (window.AudioContext || window.webkitAudioContext || window.mozAudioContext)(); //Crear conteto de audio
	volume = audioContext.createGain();
	audioInput = audioContext.createMediaStreamSource( e );
	audioInput.connect( volume );
	processor = audioContext.createScriptProcessor( bufferSize, 1, 1 );

	processor.onaudioprocess = function ( e ){

	if( e === undefined ) return;

		var left = e.inputBuffer.getChannelData( 0 );

		if( (left.buffer instanceof ArrayBuffer) && (left.length > 0) && (left.buffer !== undefined) && (left[0] != 0)){
			if( ws ){
				if( ws.readyState == WebSocket.OPEN ){
					ws.send( left.buffer );
				}//Fin if
			}//Fin ws
		}//Fin if

	}//Fin function

	volume.connect( processor );
	processor.connect( audioContext.destination );

完美无缺。但是，我无法播放服务器上收到的音频。客户端向服务器发送包含从本地麦克风捕获的PCM音频数据的Float32Array。这是我在服务器接收PCM数据时播放音频的代码：

function PlayAudio( param ){

	// creates the audio context
    var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
    
	// Create an empty two second stereo buffer at the
	// sample rate of the AudioContext
	var frameCount = audioCtx.sampleRate * 2.0;
	var bufferSize = 4096;

	var myArrayBuffer = audioCtx.createBuffer( 1, bufferSize, audioCtx.sampleRate);

	var nowBuffering = myArrayBuffer.getChannelData(0);

   	for (var i = 0 , len = param.length ; i < len ; i++) {
    	nowBuffering[i] = param[i];
   	}//fin for

   	//create a buffer source to play the audio
  	var source = audioCtx.createBufferSource();
  
  	//Copy the buffer
  	source.buffer = myArrayBuffer;

  	//Connect the audio input
  	source.connect(audioCtx.destination);

  	//Start playing
  	source.start();

}

我只用一个客户端测试服务器。服务器仅“回应”从客户端接收的PCM数据。正确发送和接收PCM数据。当我播放音频时，我只是听到“噪音”而不是我录制的声音。

我无法弄清楚我做错了什么。感谢您提供任何帮助。