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diff --git a/extern/audaspace/include/respec/LinearResampleReader.h b/extern/audaspace/include/respec/LinearResampleReader.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 LinearResampleReader.h
+ * @ingroup respec
+ * The LinearResampleReader class.
+ */
+
+#include "respec/ResampleReader.h"
+#include "util/Buffer.h"
+
+AUD_NAMESPACE_BEGIN
+
+/**
+ * This resampling reader does simple first-order hold resampling.
+ */
+class AUD_API LinearResampleReader : public ResampleReader
+{
+private:
+	/**
+	 * The reader channels.
+	 */
+	Channels m_channels;
+
+	/**
+	 * The position in the cache.
+	 */
+	float m_cache_pos;
+
+	/**
+	 * The sound output buffer.
+	 */
+	Buffer m_buffer;
+
+	/**
+	 * The input caching buffer.
+	 */
+	Buffer m_cache;
+
+	/**
+	 * Whether the cache contains valid data.
+	 */
+	bool m_cache_ok;
+
+	// delete copy constructor and operator=
+	LinearResampleReader(const LinearResampleReader&) = delete;
+	LinearResampleReader& operator=(const LinearResampleReader&) = delete;
+
+public:
+	/**
+	 * Creates a resampling reader.
+	 * \param reader The reader to mix.
+	 * \param rate The target sampling rate.
+	 */
+	LinearResampleReader(std::shared_ptr<IReader> reader, SampleRate rate);
+
+	virtual void seek(int position);
+	virtual int getLength() const;
+	virtual int getPosition() const;
+	virtual Specs getSpecs() const;
+	virtual void read(int& length, bool& eos, sample_t* buffer);
+};
+
+AUD_NAMESPACE_END