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diff --git a/dom/webidl/OscillatorNode.webidl b/dom/webidl/OscillatorNode.webidl
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+++ b/dom/webidl/OscillatorNode.webidl
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+/* -*- 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://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum OscillatorType {
+  "sine",
+  "square",
+  "sawtooth",
+  "triangle",
+  "custom"
+};
+
+dictionary OscillatorOptions : AudioNodeOptions {
+             OscillatorType type = "sine";
+             float          frequency = 440;
+             float          detune = 0;
+             PeriodicWave   periodicWave;
+};
+
+[Pref="dom.webaudio.enabled",
+ Exposed=Window]
+interface OscillatorNode : AudioScheduledSourceNode {
+    [Throws]
+    constructor(BaseAudioContext context,
+                optional OscillatorOptions options = {});
+
+    [SetterThrows]
+    attribute OscillatorType type;
+
+    readonly attribute AudioParam frequency; // in Hertz
+    readonly attribute AudioParam detune; // in Cents
+
+    undefined setPeriodicWave(PeriodicWave periodicWave);
+};
+
+// Mozilla extensions
+OscillatorNode includes AudioNodePassThrough;