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diff --git a/extern/audaspace/include/fx/ReverseReader.h b/extern/audaspace/include/fx/ReverseReader.h
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+++ b/extern/audaspace/include/fx/ReverseReader.h
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+/*******************************************************************************
+ * Copyright 2009-2016 Jörg Müller
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+#pragma once
+
+/**
+ * @file ReverseReader.h
+ * @ingroup fx
+ * The ReverseReader class.
+ */
+
+#include "fx/EffectReader.h"
+
+AUD_NAMESPACE_BEGIN
+
+/**
+ * This class reads another reader from back to front.
+ * \note The underlying reader must be seekable.
+ */
+class AUD_API ReverseReader : public EffectReader
+{
+private:
+	/**
+	 * The sample count.
+	 */
+	const int m_length;
+
+	/**
+	 * The current position.
+	 */
+	int m_position;
+
+	// delete copy constructor and operator=
+	ReverseReader(const ReverseReader&) = delete;
+	ReverseReader& operator=(const ReverseReader&) = delete;
+
+public:
+	/**
+	 * Creates a new reverse reader.
+	 * \param reader The reader to read from.
+	 * \exception Exception Thrown if the reader specified has an
+	 *            undeterminable/infinite length or is not seekable.
+	 */
+	ReverseReader(std::shared_ptr<IReader> reader);
+
+	virtual void seek(int position);
+	virtual int getLength() const;
+	virtual int getPosition() const;
+	virtual void read(int& length, bool& eos, sample_t* buffer);
+};
+
+AUD_NAMESPACE_END