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+---
+title: AudioBuffer
+slug: Web/API/AudioBuffer
+translation_of: Web/API/AudioBuffer
+---
+<p>{{APIRef("Web Audio API")}}</p>
+
+<p>La interfaz <strong><code>AudioBuffer</code></strong> representa un pequeño recurso de audio que se almacena en memoria, creado a partir de un archivo de audio usando el método {{ domxref("AudioContext.decodeAudioData()") }}, o de datos en bruto con el método {{ domxref("AudioContext.createBuffer()") }}. Una véz cargado en AudioBuffer, el audio puede ser reproducido pasandolo en el método {{ domxref("AudioBufferSourceNode") }}.</p>
+
+<p>Objetos de este tipo son diseñados para almacenar pequeños trozos de audio, normalmente menos de 45 segundos. Para audios más extensos, los objectos implementan  {{domxref("MediaElementAudioSourceNode")}} que es más adecuado. El buffer contiene data en el siguiente formado: non-interleaved IEEE754 32-bit linear PCM with a nominal range between <code>-1</code> and <code>+1</code>, that is, 32bits floating point buffer, with each samples between -1.0 and 1.0. If the {{domxref("AudioBuffer")}} has multiple channels, they are stored in separate buffer.</p>
+
+<h2 id="Constructor">Constructor</h2>
+
+<dl>
+ <dt>{{domxref("AudioBuffer.AudioBuffer", "AudioBuffer()")}}</dt>
+ <dd>Crea y retorna una nueva instancia de <code>AudioBuffer</code> </dd>
+</dl>
+
+<h2 id="Propiedades">Propiedades</h2>
+
+<dl>
+ <dt>{{domxref("AudioBuffer.sampleRate")}} {{readonlyInline}}</dt>
+ <dd>Returns a float representing the sample rate, in samples per second, of the PCM data stored in the buffer.</dd>
+ <dt>{{domxref("AudioBuffer.length")}} {{readonlyInline}}</dt>
+ <dd>Returns an integer representing the length, in sample-frames, of the PCM data stored in the buffer.</dd>
+ <dt>{{domxref("AudioBuffer.duration")}} {{readonlyInline}}</dt>
+ <dd>Returns a double representing the duration, in seconds, of the PCM data stored in the buffer.</dd>
+ <dt>{{domxref("AudioBuffer.numberOfChannels")}} {{readonlyInline}}</dt>
+ <dd>Returns an integer representing the number of discrete audio channels described by the PCM data stored in the buffer.</dd>
+</dl>
+
+<h2 id="Métodos">Métodos</h2>
+
+<dl>
+ <dt>{{domxref("AudioBuffer.getChannelData()")}}</dt>
+ <dd>Returns a {{jsxref("Float32Array")}} containing the PCM data associated with the channel, defined by the <code>channel</code> parameter (with <code>0</code> representing the first channel).</dd>
+ <dt>{{domxref("AudioBuffer.copyFromChannel()")}}</dt>
+ <dd>Copies the samples from the specified channel of the <span class="idlType"><code>AudioBuffer</code></span> to the <code>destination</code> array.</dd>
+ <dt>{{domxref("AudioBuffer.copyToChannel()")}}</dt>
+ <dd>Copies the samples to the specified channel of the <span class="idlType"><code>AudioBuffer</code></span>, from the <code>source</code> array.</dd>
+</dl>
+
+<h2 id="Ejemplo">Ejemplo</h2>
+
+<p>El siguiente ejemplo muestra como se crea un <code>AudioBuffer</code>  y rellena con un sonido blanco aleatorio. Puedes encontrar el código completo en nuestro repositorio: <a href="https://github.com/mdn/webaudio-examples">webaudio-examples</a>; y una versión disponible: <a href="https://mdn.github.io/webaudio-examples/audio-buffer/">running live</a></p>
+
+<pre class="brush: js">var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+
+// Create an empty three-second stereo buffer at the sample rate of the AudioContext
+var myArrayBuffer = audioCtx.createBuffer(2, audioCtx.sampleRate * 3, audioCtx.sampleRate);
+
+// Fill the buffer with white noise;
+// just random values between -1.0 and 1.0
+for (var channel = 0; channel &lt; myArrayBuffer.numberOfChannels; channel++) {
+  // This gives us the actual array that contains the data
+  var nowBuffering = myArrayBuffer.getChannelData(channel);
+  for (var i = 0; i &lt; myArrayBuffer.length; 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;
+
+// connect the AudioBufferSourceNode to the
+// destination so we can hear the sound
+source.connect(audioCtx.destination);
+
+// start the source playing
+source.start();
+</pre>
+
+<h2 id="Especificaciones">Especificaciones</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', '#the-audiobuffer-interface', 'AudioBuffer')}}</td>
+   <td>{{Spec2('Web Audio API')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilidad_de_navegadores">Compatibilidad de navegadores</h2>
+
+<div>
+<div class="hidden">La tabla de compatibilidades en esta página está generada por una data estructurada. Si te gustaria contribuir incluyendo data, por favor reviza <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> y envianos un pull request.</div>
+
+<p>{{Compat("api.AudioBuffer")}}</p>
+</div>
+
+<h2 id="Mira_también">Mira también</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio API</a></li>
+</ul>