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diff --git a/Source/WebCore/webaudio/RealtimeAnalyserNode.idl b/Source/WebCore/webaudio/RealtimeAnalyserNode.idl
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+/*
+ * Copyright (C) 2010, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+module audio {
+    interface [
+        Conditional=WEB_AUDIO,
+        GenerateToJS
+    ] RealtimeAnalyserNode : AudioNode {
+        attribute unsigned long fftSize;
+        readonly attribute unsigned long frequencyBinCount;
+
+        // minDecibels / maxDecibels represent the range to scale the FFT analysis data for conversion to unsigned byte values.
+        attribute float minDecibels;
+        attribute float maxDecibels;
+
+        // A value from 0.0 -> 1.0 where 0.0 represents no time averaging with the last analysis frame.
+        attribute float smoothingTimeConstant;
+
+        // Copies the current frequency data into the passed array.
+        // If the array has fewer elements than the frequencyBinCount, the excess elements will be dropped.
+        void getFloatFrequencyData(in Float32Array array);
+        void getByteFrequencyData(in Uint8Array array);
+
+        // Real-time waveform data
+        void getByteTimeDomainData(in Uint8Array array);
+    };
+}