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diff --git a/extern/audaspace/include/respec/Specification.h b/extern/audaspace/include/respec/Specification.h
deleted file mode 100644
index efcbb4cabce..00000000000
--- a/extern/audaspace/include/respec/Specification.h
+++ /dev/null
@@ -1,138 +0,0 @@
-/*******************************************************************************
- * 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 Specification.h
- * @ingroup respec
- * Defines all important macros and basic data structures for stream format descriptions.
- */
-
-#include "Audaspace.h"
-
-/// The size of a format in bytes.
-#define AUD_FORMAT_SIZE(format) (format & 0x0F)
-/// The size of a sample in the specified device format in bytes.
-#define AUD_DEVICE_SAMPLE_SIZE(specs) (specs.channels * (specs.format & 0x0F))
-/// The size of a sample in the specified format in bytes.
-#define AUD_SAMPLE_SIZE(specs) (specs.channels * sizeof(sample_t))
-
-/// Compares two audio data specifications.
-#define AUD_COMPARE_SPECS(s1, s2) ((s1.rate == s2.rate) && (s1.channels == s2.channels))
-
-/// Returns the bit for a channel mask.
-#define AUD_CHANNEL_BIT(channel) (0x01 << channel)
-
-AUD_NAMESPACE_BEGIN
-
-/**
- * The format of a sample.
- * The last 4 bit save the byte count of the format.
- */
-enum SampleFormat
-{
-	FORMAT_INVALID = 0x00,		/// Invalid sample format.
-	FORMAT_U8      = 0x01,		/// 1 byte unsigned byte.
-	FORMAT_S16     = 0x12,		/// 2 byte signed integer.
-	FORMAT_S24     = 0x13,		/// 3 byte signed integer.
-	FORMAT_S32     = 0x14,		/// 4 byte signed integer.
-	FORMAT_FLOAT32 = 0x24,		/// 4 byte float.
-	FORMAT_FLOAT64 = 0x28		/// 8 byte float.
-};
-
-/// The channel count.
-enum Channels
-{
-	CHANNELS_INVALID    = 0,	/// Invalid channel count.
-	CHANNELS_MONO       = 1,	/// Mono.
-	CHANNELS_STEREO     = 2,	/// Stereo.
-	CHANNELS_STEREO_LFE = 3,	/// Stereo with LFE channel.
-	CHANNELS_SURROUND4  = 4,	/// 4 channel surround sound.
-	CHANNELS_SURROUND5  = 5,	/// 5 channel surround sound.
-	CHANNELS_SURROUND51 = 6,	/// 5.1 surround sound.
-	CHANNELS_SURROUND61 = 7,	/// 6.1 surround sound.
-	CHANNELS_SURROUND71 = 8	/// 7.1 surround sound.
-};
-
-/// The channel names.
-enum Channel
-{
-	CHANNEL_FRONT_LEFT = 0,
-	CHANNEL_FRONT_RIGHT,
-	CHANNEL_FRONT_CENTER,
-	CHANNEL_LFE,
-	CHANNEL_REAR_LEFT,
-	CHANNEL_REAR_RIGHT,
-	CHANNEL_REAR_CENTER,
-	CHANNEL_SIDE_LEFT,
-	CHANNEL_SIDE_RIGHT,
-	CHANNEL_MAX
-};
-
-/**
- * The sample rate tells how many samples are played back within one second.
- * Some exotic formats may use other sample rates than provided here.
- */
-enum DefaultSampleRate
-{
-	RATE_INVALID = 0,			/// Invalid sample rate.
-	RATE_8000    = 8000,		/// 8000 Hz.
-	RATE_16000   = 16000,		/// 16000 Hz.
-	RATE_11025   = 11025,		/// 11025 Hz.
-	RATE_22050   = 22050,		/// 22050 Hz.
-	RATE_32000   = 32000,		/// 32000 Hz.
-	RATE_44100   = 44100,		/// 44100 Hz.
-	RATE_48000   = 48000,		/// 48000 Hz.
-	RATE_88200   = 88200,		/// 88200 Hz.
-	RATE_96000   = 96000,		/// 96000 Hz.
-	RATE_192000  = 192000		/// 192000 Hz.
-};
-
-/// Sample rate type.
-typedef double SampleRate;
-
-/// Specification of a sound source.
-struct Specs
-{
-	/// Sample rate in Hz.
-	SampleRate rate;
-
-	/// Channel count.
-	Channels channels;
-};
-
-/// Specification of a sound device.
-struct DeviceSpecs
-{
-	/// Sample format.
-	SampleFormat format;
-
-	union
-	{
-		struct
-		{
-			/// Sample rate in Hz.
-			SampleRate rate;
-
-			/// Channel count.
-			Channels channels;
-		};
-		Specs specs;
-	};
-};
-
-AUD_NAMESPACE_END