javascript - Web Audio API 多脚本处理器节点

Question

对于这个问题，我一直在寻找近两天的解决方案。我有一个捕获麦克风输入的网络音频 api 应用程序。在一个脚本处理器中，我使用汉宁窗口对信号进行窗口化，当音频链看起来像这样时，它可以正常工作：

源 -> windowScriptProcessorNode -> audioContext.destination

然后我想像这样向链中添加另一个脚本处理器：

源 -> windowScriptProcessorNode -> otherScriptProcessorNode -> audioContext.destination

但是在 otherScriptProcessorNode 的 inputBuffer 处，只有零而不是 windowScriptProcessorNode 的信号。这是一些代码：

    var audioContext = new AudioContext(); 

    //get microphone input via getUserMedia
    navigator.getUserMedia({audio: true}, function(stream) {

        //set up source
        var audioSource = audioContext.createMediaStreamSource(stream);
        audioSource.buffer = stream;    

        //set up hanning window script processor node
        var windowScriptProcessorNode = audioContext.createScriptProcessor(BLOCKLENGTH,1,1);
        windowScriptProcessorNode.onaudioprocess = function(e){
            var windowNodeInput = e.inputBuffer.getChannelData(0);
            var windowNodeOutput = e.outputBuffer.getChannelData(0);
            if (windowfunction==true) {
                windowNodeOutput.set(calc.applyDspWindowFunction(windowNodeInput));
            }else{
                windowNodeOutput.set(windowNodeInput);
            }
        }

        //some other script processor node, just passing through the signal
        var otherScriptProcessorNode = audioContext.createScriptProcessor(BLOCKLENGTH,1,1);
        otherScriptProcessorNode.onaudioprocess = function(e){
            var otherNodeInput = e.inputBuffer.getChannelData(0);
            var otherNodeOutput = e.outputBuffer.getChannelData(0);
            otherNodeOutput.set(otherNodeInput);

        }


        // this connnection works fine!
        audioSource.connect(windowScriptProcessorNode);
        windowScriptProcessorNode.connect(audioContext.destination);

        /* // this connnection does NOT work
        audioSource.connect(windowScriptProcessorNode);
        windowScriptProcessorNode.connect(otherScriptProcessorNode);
        otherScriptProcessorNode.connect(audioContext.destination);
        */
    }