如何用JavaScript改变音调? [英] How to change the pitch with JavaScript?
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问题描述
假设您有一个名为 audio
的音频变量,它存储声音.
Let’s say you have an audio variable called audio
and it stores a sound.
例如,我知道如何更改速度:
I know how to change the speed for example:
audio.playBackRate = 2;
但是我不知道如何改变音高.
But I don't know how to change the pitch.
是否有一个 audio.pitch
属性,还是我必须自己创建它?
Is there an audio.pitch
attribute or do I have to create it myself?
我想做这样的事情:
var audio = new Audio();
audio.src = "sound_effect.wav";
audio.pitch = 2 //doubling the pitch but there is no pitch attribute
audio.play();
推荐答案
我认为您需要使用一个库来应用 Tone.js PitchShift .有关工作示例,请参见GitHub用户Jexim的此JSFiddle .我从下面的这个小提琴中复制粘贴了大部分的导入和部分:
I think you need to use a library to apply pitch shifting to your audio signal. You could use the Tone.js PitchShift. See this JSFiddle of GitHub user Jexim for a working example. I copy-pasted the most importand parts from this fiddle below:
JavaScript:
var player = new Tone.Player("http://example.com/my-audiofile.mp3").sync().start(0);
var pitchShift = new Tone.PitchShift({
pitch: -5
}).toMaster();
player.connect(pitchShift);
Tone.Buffer.on('load', () => {
alert('Ready for play');
});
window.play = function() {
Tone.Transport.start();
}
HTML :
<script src="https://unpkg.com/tone@next/build/Tone.js"></script>
<button onclick="play()">Play</button>
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