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网络音频 API WaveShaperNode

发布于 2024-12-11 02:38:13 字数 57 浏览 0 评论 0原文

如何在网络音频API中使用waveshapernode？特别是曲线 Float32Array 属性？

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通知家属抬走 2024-12-18 02:38:13

请随意查看此处的示例。

详细地说，我使用此函数创建一条波形整形器曲线：

WAAMorningStar.prototype.createWSCurve = function (amount, n_samples) {

if ((amount >= 0) && (amount < 1)) {

    ND.dist = amount;

    var k = 2 * ND.dist / (1 - ND.dist);

    for (var i = 0; i < n_samples; i+=1) {
        // LINEAR INTERPOLATION: x := (c - a) * (z - y) / (b - a) + y
        // a = 0, b = 2048, z = 1, y = -1, c = i
        var x = (i - 0) * (1 - (-1)) / (n_samples - 0) + (-1);
        this.wsCurve[i] = (1 + k) * x / (1+ k * Math.abs(x));
    }

}

然后将其“加载”到波形整形器节点中，如下所示：

this.createWSCurve(ND.dist, this.nSamples);
this.sigmaDistortNode = this.context.createWaveShaper();
this.sigmaDistortNode.curve = this.wsCurve;

每次需要更改失真参数时，我都会重新创建波形整形器曲线：（

WAAMorningStar.prototype.setDistortion = function (distValue) {
    var distCorrect = distValue;
    if (distValue < -1) {
        distCorrect = -1;
    }
    if (distValue >= 1) {
        distCorrect = 0.985;
    }
    this.createWSCurve (distCorrect, this.nSamples);
}

我使用 distCorrect 来制作失真声音更好，通过探索发现的价值观）。
您可以在此处找到我用来创建波形成形器曲线的算法

Feel free to look at an example here.

In detail, I create a waveshaper curve with this function:

WAAMorningStar.prototype.createWSCurve = function (amount, n_samples) {

if ((amount >= 0) && (amount < 1)) {

    ND.dist = amount;

    var k = 2 * ND.dist / (1 - ND.dist);

    for (var i = 0; i < n_samples; i+=1) {
        // LINEAR INTERPOLATION: x := (c - a) * (z - y) / (b - a) + y
        // a = 0, b = 2048, z = 1, y = -1, c = i
        var x = (i - 0) * (1 - (-1)) / (n_samples - 0) + (-1);
        this.wsCurve[i] = (1 + k) * x / (1+ k * Math.abs(x));
    }

}

Then "load" it in a waveshaper node like this:

this.createWSCurve(ND.dist, this.nSamples);
this.sigmaDistortNode = this.context.createWaveShaper();
this.sigmaDistortNode.curve = this.wsCurve;

Everytime I need to change the distortion parameter, I re-create the waveshaper curve:

WAAMorningStar.prototype.setDistortion = function (distValue) {
    var distCorrect = distValue;
    if (distValue < -1) {
        distCorrect = -1;
    }
    if (distValue >= 1) {
        distCorrect = 0.985;
    }
    this.createWSCurve (distCorrect, this.nSamples);
}

(I use distCorrect to make the distortion sound nicer, values found euristically).
You can find the algorithm I use to create the waveshaper curve here

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