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diff --git a/Source/WebCore/webaudio/DynamicsCompressorNode.cpp b/Source/WebCore/webaudio/DynamicsCompressorNode.cpp
new file mode 100644
index 000000000..ea8b58922
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+++ b/Source/WebCore/webaudio/DynamicsCompressorNode.cpp
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+/*
+ * Copyright (C) 2011, 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.
+ */
+
+#include "config.h"
+
+#if ENABLE(WEB_AUDIO)
+
+#include "DynamicsCompressorNode.h"
+
+#include "AudioContext.h"
+#include "AudioNodeInput.h"
+#include "AudioNodeOutput.h"
+#include "DynamicsCompressor.h"
+
+namespace WebCore {
+
+DynamicsCompressorNode::DynamicsCompressorNode(AudioContext* context, float sampleRate)
+    : AudioNode(context, sampleRate)
+{
+    addInput(adoptPtr(new AudioNodeInput(this)));
+    addOutput(adoptPtr(new AudioNodeOutput(this, 2)));
+    
+    setNodeType(NodeTypeDynamicsCompressor);
+    
+    initialize();
+}
+
+DynamicsCompressorNode::~DynamicsCompressorNode()
+{
+    uninitialize();
+}
+
+void DynamicsCompressorNode::process(size_t framesToProcess)
+{
+    AudioBus* outputBus = output(0)->bus();
+    ASSERT(outputBus);
+
+    m_dynamicsCompressor->process(input(0)->bus(), outputBus, framesToProcess);
+}
+
+void DynamicsCompressorNode::reset()
+{
+    m_dynamicsCompressor->reset();
+}
+
+void DynamicsCompressorNode::initialize()
+{
+    if (isInitialized())
+        return;
+
+    AudioNode::initialize();    
+    m_dynamicsCompressor = adoptPtr(new DynamicsCompressor(true, sampleRate()));
+}
+
+void DynamicsCompressorNode::uninitialize()
+{
+    if (!isInitialized())
+        return;
+
+    m_dynamicsCompressor.clear();
+    AudioNode::uninitialize();
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_AUDIO)