Pizzicato JS -无频率数据

Question

我想使用Pizzicato JS，与三个JS创建一个声音可视化。但由于某种原因，在我获得频率数据后，它为每个频段返回的频率为0。为了获得这些频率，我是否遗漏了什么，这样我就可以用三个JS来操纵我的网格，请告诉我？我已经附加了我的控制台窗口的屏幕截图，并粘贴了下面的代码以供参考。

var context = Pizzicato.context;
var analyser = context.createAnalyser();

var ambient = new Pizzicato.Sound('./mp3/ambient.mp3', playAmbient);
ambient.loop = true;
ambient.volume = 1;
ambient.connect(analyser);

var frequencyData = new Uint8Array(analyser.frequencyBinCount);
console.log("Frequency Data: " , frequencyData);
console.log("Frequency Data Length: " , frequencyData.length);`

function playAmbient(e)
{
    console.log("playAmbient();");
    ambient.play();
}

​

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谢谢

Answer 1

所以我弄清楚了，我希望频率数据在执行console.log()时返回每个频带的频率数组。实际上，我必须使用getByteFrequencyData方法接收我的频率数据。我粘贴了我的新代码集来引用未定义数据的问题。

context = Pizzicato.context;
analyser = context.createAnalyser();

sound = new Pizzicato.Sound(params, playAmbient);
sound.volume = 1;
sound.connect(analyser);

function playAmbient(e)
{
    console.log("playAmbient();");
    ambient.play();
}
setInterval(function () {
    try{
        var bufferLength = analyser.frequencyBinCount;
        frequencyData = new Uint8Array(bufferLength);

        // The statement below was missing, and in return it will then 
        // update my frequencies for each band given from my 
        // frequencyData.
        analyser.getByteFrequencyData(frequencyData);

        // Now I'm seeing the frequencies update in my console.log window 
        // when each interval is fired.
        console.log(frequencyData);
    }catch(error){
        console.log(error);
    }        
}, 500);