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---
title: AudioBufferSourceNode.buffer
slug: Web/API/AudioBufferSourceNode/buffer
tags:
- API
- AudioBufferSourceNode
- Web Audio API
translation_of: Web/API/AudioBufferSourceNode/buffer
---
<p>{{ APIRef("Web Audio API") }}</p>
<p>{{ domxref("AudioBufferSourceNode") }} 接口的<span style='background-color: transparent; color: #333333; display: inline !important; float: none; font-family: "Open Sans",arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; white-space: normal;'> </span><code style=""><strong style="border-bottom-style: none; border-bottom-width: 0px; border-left-style: none; border-left-width: 0px; border-right-style: none; border-right-width: 0px; border-top-style: none; border-top-width: 0px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">buffer</strong></code><span style='background-color: transparent; color: #333333; display: inline !important; float: none; font-family: "Open Sans",arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; white-space: normal;'> 属性提供了重复播放音频的能力，该音频使用 </span>{{domxref("AudioBuffer")}} 作为声音文件的来源。</p>
<p>如果 <code>buffer</code> 属性的值为 <code>null</code>, 节点会自动生成一个单声道的无声文件（所有采样均为0）。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox"><em>AudioBufferSourceNode</em>.buffer = <em>soundBuffer</em>;
</pre>
<h3 id="返回值">返回值</h3>
<p>{{domxref("AudioBuffer")}}，<span style='background-color: transparent; color: #333333; display: inline !important; float: none; font-family: "Open Sans",arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; white-space: normal;'>包含了节点将要播放的声音数据</span>。</p>
<h2 id="示例">示例</h2>
<div class="note">
<p>完整的示例请查看 <a class="external external-icon" href="http://mdn.github.io/audio-buffer/"> this code running live</a>，或 <a class="external external-icon" href="https://github.com/mdn/audio-buffer">view the source。</a></p>
</div>
<pre class="brush: js;highlight[19]">var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);
button.onclick = function() {
// Fill the buffer with white noise;
//just random values between -1.0 and 1.0
for (var channel = 0; channel < channels; channel++) {
// This gives us the actual ArrayBuffer that contains the data
var nowBuffering = myArrayBuffer.getChannelData(channel);
for (var i = 0; i < frameCount; i++) {
// Math.random() is in [0; 1.0]
// audio needs to be in [-1.0; 1.0]
nowBuffering[i] = Math.random() * 2 - 1;
}
}
// Get an AudioBufferSourceNode.
// This is the AudioNode to use when we want to play an AudioBuffer
var source = audioCtx.createBufferSource();
// set the buffer in the AudioBufferSourceNode
source.buffer = myArrayBuffer;</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName("Web Audio API", "#widl-AudioBufferSourceNode-buffer", "buffer")}}</td>
<td>{{Spec2("Web Audio API")}}</td>
<td>Initial definition</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<div>
<p>{{Compat("api.AudioBufferSourceNode.buffer")}}</p>
</div>
<h2 id="相关链接">相关链接</h2>
<p>{{page("/en-US/docs/Web/API/AudioBufferSourceNode","See_also")}}</p>
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