diff --git a/Source/Core/Core/Core.vcxproj b/Source/Core/Core/Core.vcxproj
index d83fa7fcc7..dca0d072fc 100644
--- a/Source/Core/Core/Core.vcxproj
+++ b/Source/Core/Core/Core.vcxproj
@@ -461,7 +461,6 @@
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AX.h" />
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AXStructs.h" />
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AXWii.h" />
-    <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AX_ADPCM.h" />
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AX_Voice.h" />
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_CARD.h" />
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_GBA.h" />
diff --git a/Source/Core/Core/Core.vcxproj.filters b/Source/Core/Core/Core.vcxproj.filters
index 8e2592450c..68953aef07 100644
--- a/Source/Core/Core/Core.vcxproj.filters
+++ b/Source/Core/Core/Core.vcxproj.filters
@@ -727,9 +727,6 @@
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AX.h">
       <Filter>HW %28Flipper/Hollywood%29\DSP Interface + HLE\HLE\uCodes</Filter>
     </ClInclude>
-    <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AX_ADPCM.h">
-      <Filter>HW %28Flipper/Hollywood%29\DSP Interface + HLE\HLE\uCodes</Filter>
-    </ClInclude>
     <ClInclude Include="Src\HW\DSPHLE\UCodes\UCode_AX_Voice.h">
       <Filter>HW %28Flipper/Hollywood%29\DSP Interface + HLE\HLE\uCodes</Filter>
     </ClInclude>
diff --git a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_ADPCM.h b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_ADPCM.h
deleted file mode 100644
index 9130bb9da4..0000000000
--- a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_ADPCM.h
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright (C) 2003 Dolphin Project.
-
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, version 2.0.
-
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License 2.0 for more details.
-
-// A copy of the GPL 2.0 should have been included with the program.
-// If not, see http://www.gnu.org/licenses/
-
-// Official SVN repository and contact information can be found at
-// http://code.google.com/p/dolphin-emu/
-
-#ifndef _UCODE_AX_ADPCM_H
-#define _UCODE_AX_ADPCM_H
-
-#include "../../DSP.h"
-
-static inline s16 ADPCM_Step(PBADPCMInfo &adpcm, u32& samplePos, u32 newSamplePos, u16 frac)
-{
-	while (samplePos < newSamplePos)
-	{
-		if ((samplePos & 15) == 0)
-		{
-			adpcm.pred_scale = DSP::ReadARAM((samplePos & ~15) >> 1);
-			samplePos    += 2;
-			newSamplePos += 2;
-		}
-
-		int scale = 1 << (adpcm.pred_scale & 0xF);
-		int coef_idx = (adpcm.pred_scale >> 4) & 7;
-
-		s32 coef1 = adpcm.coefs[coef_idx * 2 + 0];
-		s32 coef2 = adpcm.coefs[coef_idx * 2 + 1];
-
-		int temp = (samplePos & 1) ?
-			   (DSP::ReadARAM(samplePos >> 1) & 0xF) :
-			   (DSP::ReadARAM(samplePos >> 1) >> 4);
-
-		if (temp >= 8)
-			temp -= 16;
-
-		// 0x400 = 0.5 in 11-bit fixed point
-		int val = (scale * temp) + ((0x400 + coef1 * adpcm.yn1 + coef2 * adpcm.yn2) >> 11);
-
-		if (val > 0x7FFF)
-			val = 0x7FFF;
-		else if (val < -0x7FFF)
-			val = -0x7FFF;
-		
-		adpcm.yn2 = adpcm.yn1;
-		adpcm.yn1 = val;
-
-		samplePos++;
-	}
-
-	return adpcm.yn1;
-}
-
-// TODO: WTF is going on here?!?
-// Volume control (ramping)
-static inline u16 ADPCM_Vol(u16 vol, u16 delta)
-{
-	int x = vol;
-	if (delta && delta < 0x5000)
-		x += delta * 20 * 8; // unsure what the right step is
-		//x += 1 * 20 * 8;
-	else if (delta && delta > 0x5000)
-		//x -= (0x10000 - delta); // this is to small, it's often 1
-		x -= (0x10000 - delta) * 20 * 16; // if this was 20 * 8 the sounds in Fire Emblem and Paper Mario
-			// did not have time to go to zero before the were closed
-		//x -= 1 * 20 * 16;
-
-	 // make lower limits
-	if (x < 0) x = 0;	
-	//if (pb.mixer_control < 1000 && x < pb.mixer_control) x = pb.mixer_control; // does this make
-		// any sense?
-
-	// make upper limits
-	//if (mixer_control > 1000 && x > mixer_control) x = mixer_control; // maybe mixer_control also
-		// has a volume target?
-	//if (x >= 0x7fff) x = 0x7fff; // this seems a little high
-	//if (x >= 0x4e20) x = 0x4e20; // add a definitive limit at 20 000
-	if (x >= 0x8000) x = 0x8000; // clamp to 32768;
-	return x; // update volume
-}
-
-#endif  // _UCODE_AX_ADPCM_H