回答

var buffer = (new Response(data)).arrayBuffer();//二进制缓存区内容
buffer.then(function(buf){

	var audioContext = new ( window.AudioContext || window.webkitAudioContext )();
	var fileResult =addWavHeader(buf, '8000', '16', '1');//解析数据转码wav
	audioContext.decodeAudioData(fileResult, function(buffer) {
	_visualize(audioContext,buffer);//播放
 });



    //处理音频流，转码wav
    var addWavHeader = function(samples,sampleRateTmp,sampleBits,channelCount){
        var dataLength = samples.byteLength;
        var buffer = new ArrayBuffer(44 + dataLength);
        var view = new DataView(buffer);
        function writeString(view, offset, string){
            for (var i = 0; i < string.length; i++){
                view.setUint8(offset + i, string.charCodeAt(i));
            }
        }
        var offset = 0;
        /* 资源交换文件标识符 */
        writeString(view, offset, 'RIFF'); offset += 4;
        /* 下个地址开始到文件尾总字节数,即文件大小-8 */
        view.setUint32(offset, /*32*/ 36 + dataLength, true); offset += 4;
        /* WAV文件标志 */
        writeString(view, offset, 'WAVE'); offset += 4;
        /* 波形格式标志 */
        writeString(view, offset, 'fmt '); offset += 4;
        /* 过滤字节,一般为 0x10 = 16 */
        view.setUint32(offset, 16, true); offset += 4;
        /* 格式类别 (PCM形式采样数据) */
        view.setUint16(offset, 1, true); offset += 2;
        /* 通道数 */
        view.setUint16(offset, channelCount, true); offset += 2;
        /* 采样率,每秒样本数,表示每个通道的播放速度 */
        view.setUint32(offset, sampleRateTmp, true); offset += 4;
        /* 波形数据传输率 (每秒平均字节数) 通道数×每秒数据位数×每样本数据位/8 */
        view.setUint32(offset, sampleRateTmp * channelCount * (sampleBits / 8), true); offset +=4;
        /* 快数据调整数 采样一次占用字节数 通道数×每样本的数据位数/8 */
        view.setUint16(offset, channelCount * (sampleBits / 8), true); offset += 2;
        /* 每样本数据位数 */
        view.setUint16(offset, sampleBits, true); offset += 2;
        /* 数据标识符 */
        writeString(view, offset, 'data'); offset += 4;
        /* 采样数据总数,即数据总大小-44 */
        view.setUint32(offset, dataLength, true); offset += 4;
        function floatTo32BitPCM(output, offset, input){
            input = new Int32Array(input);
            for (var i = 0; i < input.length; i++, offset+=4){
                output.setInt32(offset,input[i],true);
            }
        }
        function floatTo16BitPCM(output, offset, input){
            input = new Int16Array(input);
            for (var i = 0; i < input.length; i++, offset+=2){
                output.setInt16(offset,input[i],true);
            }
        }
        function floatTo8BitPCM(output, offset, input){
            input = new Int8Array(input);
            for (var i = 0; i < input.length; i++, offset++){
                output.setInt8(offset,input[i],true);
            }
        }
        if(sampleBits == 16){
            floatTo16BitPCM(view, 44, samples);
        }else if(sampleBits == 8){
            floatTo8BitPCM(view, 44, samples);
        }else{
            floatTo32BitPCM(view, 44, samples);
        }
        return view.buffer;
    }
    //播放音频
    var _visualize = function(audioContext, buffer) {
        var audioBufferSouceNode = audioContext.createBufferSource(),
            analyser = audioContext.createAnalyser(),
            that = this;
        //将信号源连接到分析仪
        audioBufferSouceNode.connect(analyser);
        //将分析仪连接到目的地（扬声器），否则我们将听不到声音
        analyser.connect(audioContext.destination);
        //然后将缓冲区分配给缓冲区源节点
        audioBufferSouceNode.buffer = buffer;
        //发挥作用
        if (!audioBufferSouceNode.start) {
            audioBufferSouceNode.start = audioBufferSouceNode.noteOn //在旧浏览器中使用noteOn方法
            audioBufferSouceNode.stop = audioBufferSouceNode.noteOff //在旧浏览器中使用noteOff方法
        };
        //如果有的话，停止前一个声音
        if (this.animationId !== null) {
            cancelAnimationFrame(this.animationId);
        }
        audioBufferSouceNode.start(0);
        audo.source = audioBufferSouceNode;
       audo.audioContext = audioContext;
    }