diff --git a/zsnes/src/cpu/dspproc.asm b/zsnes/src/cpu/dspproc.asm
index afad7d1b..3295bc90 100644
--- a/zsnes/src/cpu/dspproc.asm
+++ b/zsnes/src/cpu/dspproc.asm
@@ -129,7 +129,7 @@ EXTSYM InterSound
 EXTSYM NoiseData,SoundCompD,Voice0Disable,csounddisable,dssel,spcRamcmp
 EXTSYM cfgecho,Surround,SoundBufEn
 EXTSYM echobuf,ENVDisable
-EXTSYM LowPassFilter
+EXTSYM LowPassFilterType
 EXTSYM UseCubicSpline,NoiseDisTemp
 
 NEWSYM DspProcAsmStart
@@ -5334,7 +5334,7 @@ NEWSYM ProcessVoice816
     loop .revstloop
 .norevstereo
 
-    cmp byte[LowPassFilter],0
+    cmp byte[LowPassFilterType],0
     je near LPFexit
     mov esi,DSPBuffer
     cmp byte[StereoSound],1
diff --git a/zsnes/src/gui/gui.asm b/zsnes/src/gui/gui.asm
index 3ed9618c..e314563b 100644
--- a/zsnes/src/gui/gui.asm
+++ b/zsnes/src/gui/gui.asm
@@ -483,7 +483,7 @@ NEWSYM pl4URk,    dd 0
 NEWSYM pl4DLk,    dd 0
 NEWSYM pl4DRk,    dd 0
 
-NEWSYM LowPassFilter,  db 0
+NEWSYM LowPassFilterType,  db 0
 NEWSYM DontSavePath,  db 0
 NEWSYM ReCalib, db 1
 NEWSYM GUIComboGameSpec, db 0
@@ -616,9 +616,9 @@ ModemPTimer  dd 0       ; Timer for modem process
 ModemOKStat  db 0       ; OK is detected on modem status
 
 ;                LOAD STAT INPT OPT  VID  SND  CHT  NET  GMKEY GUIOP ABT  RSET SRC  STCN MOVE CMBO ADDO
-GUIwinposxo dd 0,5   ,60  ,30  ,55  ,50  ,65  ,5   ,30  ,20   ,10   ,80  ,65  ,20  ,70  ,50  ,3   ,50
+GUIwinposxo dd 0,5   ,60  ,30  ,55  ,50  ,35  ,5   ,30  ,20   ,10   ,80  ,65  ,20  ,70  ,50  ,3   ,50
 GUIwinposyo dd 0,20  ,70  ,30  ,20  ,20  ,20  ,20  ,30  ,20   ,20   ,50  ,60  ,30  ,65  ,50  ,22  ,60
-GUIwinsizex dd 0,244 ,126 ,189 ,167 ,170 ,148 ,244 ,8*16,224  ,240  ,7*16,9*16,8*16,9*16,140 ,250 ,160
+GUIwinsizex dd 0,244 ,126 ,189 ,167 ,170 ,188 ,244 ,8*16,224  ,240  ,7*16,9*16,8*16,9*16,140 ,250 ,160
 GUIwinsizey dd 0,190 ,3*16,166 ,190 ,192 ,184 ,191 ,40  ,189  ,192  ,98  ,42  ,40  ,42  ,70  ,190 ,60
 GUIwinptr   db 0
 
diff --git a/zsnes/src/gui/guikeys.inc b/zsnes/src/gui/guikeys.inc
index b4746259..41d59d9a 100644
--- a/zsnes/src/gui/guikeys.inc
+++ b/zsnes/src/gui/guikeys.inc
@@ -1258,6 +1258,18 @@ GUISoundKeys:
     jne .no8ptinterp
     GUIkeystoggleoptn byte[SoundInterpType],3
 .no8ptinterp
+    cmp dh,'I'
+    jne .nosimplefilter
+    GUIkeystoggleoptn byte[LowPassFilterType],1
+.nosimplefilter
+    cmp dh,'Y'
+    jne .nodynamicfilter
+    GUIkeystoggleoptn byte[LowPassFilterType],2
+.nodynamicfilter
+    cmp dh,'H'
+    jne .nohiqualityfilter
+    GUIkeystoggleoptn byte[LowPassFilterType],3
+.nohiqualityfilter
     ret
 
 .sampratenext db 1,4,5,6,2,3,0,0,0,0
diff --git a/zsnes/src/gui/guimouse.inc b/zsnes/src/gui/guimouse.inc
index 82b9de3b..2c348637 100644
--- a/zsnes/src/gui/guimouse.inc
+++ b/zsnes/src/gui/guimouse.inc
@@ -2335,6 +2335,9 @@ DisplayGUISoundClick:
     GUIClickCButton6 11,161,byte[SoundInterpType],1
     GUIClickCButton6 11,171,byte[SoundInterpType],2
     GUIClickCButton6 11,181,byte[SoundInterpType],3
+    GUIClickCButton6 111,161,byte[LowPassFilterType],1
+    GUIClickCButton6 111,171,byte[LowPassFilterType],2
+    GUIClickCButton6 111,181,byte[LowPassFilterType],3
     cmp eax,15
     jl near .nosrate
     cmp edx,61
diff --git a/zsnes/src/gui/guiwindp.inc b/zsnes/src/gui/guiwindp.inc
index dd77f0b9..57dbb1ef 100644
--- a/zsnes/src/gui/guiwindp.inc
+++ b/zsnes/src/gui/guiwindp.inc
@@ -2183,6 +2183,9 @@ DisplayGUISound:
     GUIOuttextwin2u 6,26,166,GUISoundTextQ,0
     GUIOuttextwin2u 6,26,176,GUISoundTextR,0
     GUIOuttextwin2u 6,26,186,GUISoundTextS,0
+    GUIOuttextwin2u 6,126,166,GUISoundTextU,1
+    GUIOuttextwin2u 6,126,176,GUISoundTextV,1
+    GUIOuttextwin2u 6,126,186,GUISoundTextW,0
     add byte[GUItextcolor],15
     GUIOuttextwin2 6,25,25,GUISoundText1
     GUIOuttextwin2 6,25,34,GUISoundText3
@@ -2208,12 +2211,16 @@ DisplayGUISound:
     GUIOuttextwin2 6,25,165,GUISoundTextQ
     GUIOuttextwin2 6,25,175,GUISoundTextR
     GUIOuttextwin2 6,25,185,GUISoundTextS
+    GUIOuttextwin2 6,125,165,GUISoundTextU
+    GUIOuttextwin2 6,125,175,GUISoundTextV
+    GUIOuttextwin2 6,125,185,GUISoundTextW
     mov al,[GUIWincol]
     mov byte[GUItextcolor],al
     GUIOuttextwin2 6,6,16,GUISoundText6
     GUIOuttextwin2u 6,6,53,GUISoundText2,9
     GUIOuttextwin2 6,6,76,GUISoundText5
     GUIOuttextwin2 6,6,156,GUISoundTextP
+    GUIOuttextwin2 6,106,156,GUISoundTextT
     mov byte[GUItextcolor],163
     cmp byte[GUIWincoladd],0
     je .zero3
@@ -2223,6 +2230,7 @@ DisplayGUISound:
     GUIOuttextwin2 6,5,52,GUISoundText2
     GUIOuttextwin2 6,5,75,GUISoundText5
     GUIOuttextwin2 6,5,155,GUISoundTextP
+    GUIOuttextwin2 6,105,155,GUISoundTextT
     mov dword[GUITemp],GUIIconDataCheckBoxUC
     cmp byte[cfgsoundon],0
     je .nocheckbox
@@ -2306,6 +2314,24 @@ DisplayGUISound:
     mov dword[GUITemp],GUIIconDataCheckBoxC
 .nocheckbox9
     GUIDisplayIconWin 6,11,181,[GUITemp]
+    mov dword[GUITemp],GUIIconDataCheckBoxUC
+    cmp byte[LowPassFilterType],1
+    jne .nocheckbox10
+    mov dword[GUITemp],GUIIconDataCheckBoxC
+.nocheckbox10
+    GUIDisplayIconWin 6,111,161,[GUITemp]
+    mov dword[GUITemp],GUIIconDataCheckBoxUC
+    cmp byte[LowPassFilterType],2
+    jne .nocheckbox11
+    mov dword[GUITemp],GUIIconDataCheckBoxC
+.nocheckbox11
+    GUIDisplayIconWin 6,111,171,[GUITemp]
+    mov dword[GUITemp],GUIIconDataCheckBoxUC
+    cmp byte[LowPassFilterType],3
+    jne .nocheckbox12
+    mov dword[GUITemp],GUIIconDataCheckBoxC
+.nocheckbox12
+    GUIDisplayIconWin 6,111,181,[GUITemp]
     DrawGUIWinBox 6,15,61,69,69,167
     mov dword[GUITemp],GUISoundText7
     xor eax,eax
@@ -2398,6 +2424,10 @@ GUISoundTextP db 'INTERPOLATION :',0
 GUISoundTextQ db 'GAUSSEN',0
 GUISoundTextR db 'CUBIC SPLINE',0
 GUISoundTextS db '8-POINT',0
+GUISoundTextT db 'LOWPASS :',0
+GUISoundTextU db 'SIMPLE',0
+GUISoundTextV db 'DYNAMIC',0
+GUISoundTextW db 'HI QUALITY',0