diff -r 000000000000 -r 6474c204b198 dom/webidl/AudioBuffer.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/AudioBuffer.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface AudioBuffer {
+
+    readonly attribute float sampleRate;
+    readonly attribute long length;
+
+    // in seconds 
+    readonly attribute double duration;
+
+    readonly attribute long numberOfChannels;
+
+    [Throws]
+    Float32Array getChannelData(unsigned long channel);
+
+    [Throws]
+    void copyFromChannel(Float32Array destination, long channelNumber, optional unsigned long startInChannel = 0);
+    [Throws]
+    void copyToChannel(Float32Array source, long channelNumber, optional unsigned long startInChannel = 0);
+};
+