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diff --git a/src/common_audio/vad/main/source/vad_const.c b/src/common_audio/vad/main/source/vad_const.c
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+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+/*
+ * This file includes the constant values used internally in VAD.
+ */
+
+#include "vad_const.h"
+
+// Spectrum Weighting
+const WebRtc_Word16 kSpectrumWeight[6] = {6, 8, 10, 12, 14, 16};
+
+const WebRtc_Word16 kCompVar = 22005;
+
+// Constant 160*log10(2) in Q9
+const WebRtc_Word16 kLogConst = 24660;
+
+// Constant log2(exp(1)) in Q12
+const WebRtc_Word16 kLog10Const = 5909;
+
+// Q15
+const WebRtc_Word16 kNoiseUpdateConst = 655;
+const WebRtc_Word16 kSpeechUpdateConst = 6554;
+
+// Q8
+const WebRtc_Word16 kBackEta = 154;
+
+// Coefficients used by WebRtcVad_HpOutput, Q14
+const WebRtc_Word16 kHpZeroCoefs[3] = {6631, -13262, 6631};
+const WebRtc_Word16 kHpPoleCoefs[3] = {16384, -7756, 5620};
+
+// Allpass filter coefficients, upper and lower, in Q15
+// Upper: 0.64, Lower: 0.17
+const WebRtc_Word16 kAllPassCoefsQ15[2] = {20972, 5571};
+const WebRtc_Word16 kAllPassCoefsQ13[2] = {5243, 1392}; // Q13
+
+// Minimum difference between the two models, Q5
+const WebRtc_Word16 kMinimumDifference[6] = {544, 544, 576, 576, 576, 576};
+
+// Upper limit of mean value for speech model, Q7
+const WebRtc_Word16 kMaximumSpeech[6] = {11392, 11392, 11520, 11520, 11520, 11520};
+
+// Minimum value for mean value
+const WebRtc_Word16 kMinimumMean[2] = {640, 768};
+
+// Upper limit of mean value for noise model, Q7
+const WebRtc_Word16 kMaximumNoise[6] = {9216, 9088, 8960, 8832, 8704, 8576};
+
+// Adjustment for division with two in WebRtcVad_SplitFilter
+const WebRtc_Word16 kOffsetVector[6] = {368, 368, 272, 176, 176, 176};
+
+// Start values for the Gaussian models, Q7
+// Weights for the two Gaussians for the six channels (noise)
+const WebRtc_Word16 kNoiseDataWeights[12] = {34, 62, 72, 66, 53, 25, 94, 66, 56, 62, 75, 103};
+
+// Weights for the two Gaussians for the six channels (speech)
+const WebRtc_Word16 kSpeechDataWeights[12] = {48, 82, 45, 87, 50, 47, 80, 46, 83, 41, 78, 81};
+
+// Means for the two Gaussians for the six channels (noise)
+const WebRtc_Word16 kNoiseDataMeans[12] = {6738, 4892, 7065, 6715, 6771, 3369, 7646, 3863,
+        7820, 7266, 5020, 4362};
+
+// Means for the two Gaussians for the six channels (speech)
+const WebRtc_Word16 kSpeechDataMeans[12] = {8306, 10085, 10078, 11823, 11843, 6309, 9473,
+        9571, 10879, 7581, 8180, 7483};
+
+// Stds for the two Gaussians for the six channels (noise)
+const WebRtc_Word16 kNoiseDataStds[12] = {378, 1064, 493, 582, 688, 593, 474, 697, 475, 688,
+        421, 455};
+
+// Stds for the two Gaussians for the six channels (speech)
+const WebRtc_Word16 kSpeechDataStds[12] = {555, 505, 567, 524, 585, 1231, 509, 828, 492, 1540,
+        1079, 850};