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---
title: OscillatorNode.detune
slug: Web/API/OscillatorNode/detune
translation_of: Web/API/OscillatorNode/detune
---
<p>{{ APIRef("Web Audio API") }}</p>
<div>
<p>{{ domxref("OscillatorNode") }} 的 <code>detune 属性的接口</code>是 <a href="/en-US/docs/Web/API/AudioParam#a-rate">a-rate</a> {{domxref("AudioParam")}} ，代表振荡频率的失谐量（<a href="http://en.wikipedia.org/wiki/Cent_%28music%29">cents</a>）。</p>
</div>
<h2 id="语法">语法</h2>
<pre class="brush: js">var oscillator = audioCtx.createOscillator();
oscillator.detune.value = 100; // value in cents</pre>
<div class="note">
<p><strong>Note:</strong> 虽然返回的 <code>AudioParam</code> 是只读的，但是它表示的值不是。</p>
</div>
<h3 id="值"> 值</h3>
<p>一个 <a href="/en-US/docs/Web/API/AudioParam#a-rate">a-rate</a> {{domxref("AudioParam")}} 的值</p>
<h2 id="示例">示例</h2>
<p>下面的例子使用 {{ domxref("AudioContext") }} 创建了一个 oscillator node。 这是已经在运行的例子，查看 <a href="http://mdn.github.io/violent-theremin/">Violent Theremin demo</a> (<a href="https://github.com/mdn/violent-theremin/blob/gh-pages/scripts/app.js">see app.js</a> 是相关源码)。</p>
<pre class="brush: js;highlight[9]">// create web audio api context
var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
// create Oscillator node
var oscillator = audioCtx.createOscillator();
oscillator.type = 'square';
oscillator.frequency.value = 440; // value in hertz
oscillator.detune.value = 100; // value in cents
oscillator.start();</pre>
<h2 id="说明">说明</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('Web Audio API', '#widl-OscillatorNode-detune', 'detune')}}</td>
<td>{{Spec2('Web Audio API')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
{{Compat("api.OscillatorNode.detune")}}
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio API</a></li>
</ul>
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