diff --git a/src/gui/presets.cpp b/src/gui/presets.cpp
index dbbaefe9..86450372 100644
--- a/src/gui/presets.cpp
+++ b/src/gui/presets.cpp
@@ -440,14 +440,14 @@ void FurnaceGUI::initSystemPresets() {
   cat.systems.push_back(FurnaceGUISysDef(
     "NEC PC-98 (with PC-9801-26/K)", {
       DIV_SYSTEM_OPN, 64, 0, 4, // 3.9936MHz but some compatible card has 4MHz
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
   cat.systems.push_back(FurnaceGUISysDef(
     "NEC PC-98 (with PC-9801-26/K; extended channel 3)", {
       DIV_SYSTEM_OPN_EXT, 64, 0, 4, // 3.9936MHz but some compatible card has 4MHz
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -455,7 +455,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra)", {
       DIV_SYSTEM_OPN, 64, 0, 4,
       DIV_SYSTEM_OPL2, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -463,7 +463,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra; extended channel 3)", {
       DIV_SYSTEM_OPN_EXT, 64, 0, 4,
       DIV_SYSTEM_OPL2, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -471,7 +471,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra in drums mode)", {
       DIV_SYSTEM_OPN, 64, 0, 4,
       DIV_SYSTEM_OPL2_DRUMS, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -479,7 +479,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra in drums mode; extended channel 3)", {
       DIV_SYSTEM_OPN_EXT, 64, 0, 4,
       DIV_SYSTEM_OPL2_DRUMS, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -487,7 +487,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra V)", {
       DIV_SYSTEM_OPN, 64, 0, 4,
       DIV_SYSTEM_Y8950, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -495,7 +495,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra V; extended channel 3)", {
       DIV_SYSTEM_OPN_EXT, 64, 0, 4,
       DIV_SYSTEM_Y8950, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -503,7 +503,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra V in drums mode)", {
       DIV_SYSTEM_OPN, 64, 0, 4,
       DIV_SYSTEM_Y8950_DRUMS, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -511,7 +511,7 @@ void FurnaceGUI::initSystemPresets() {
     "NEC PC-98 (with Sound Orchestra V in drums mode; extended channel 3)", {
       DIV_SYSTEM_OPN_EXT, 64, 0, 4,
       DIV_SYSTEM_Y8950_DRUMS, 64, 0, 4,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -520,7 +520,7 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_PC98, 64, 0, 1,
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16), // 2x 16-bit Burr Brown DAC
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16),
-      DIV_SYSTEM_PCSPKR, 64, 0, 2,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -529,21 +529,21 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_PC98_EXT, 64, 0, 1,
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16),
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16),
-      DIV_SYSTEM_PCSPKR, 64, 0, 2,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
     cat.systems.push_back(FurnaceGUISysDef(
     "NEC PC-98 (with PC-9801-73)", {
       DIV_SYSTEM_PC98, 64, 0, 1,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
     cat.systems.push_back(FurnaceGUISysDef(
     "NEC PC-98 (with PC-9801-73; extended channel 3)", {
       DIV_SYSTEM_PC98_EXT, 64, 0, 1,
-      DIV_SYSTEM_PCSPKR, 64, 0, 1,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -552,7 +552,7 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_OPN, 64, 0, 2, // 4MHz
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16)|(1<<20),
       DIV_SYSTEM_OPL3, 64, 0, 0,
-      DIV_SYSTEM_PCSPKR, 64, 0, 2,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -561,7 +561,7 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_OPN_EXT, 64, 0, 2, // 4MHz
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16)|(1<<20),
       DIV_SYSTEM_OPL3, 64, 0, 0,
-      DIV_SYSTEM_PCSPKR, 64, 0, 2,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -570,7 +570,7 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_OPN, 64, 0, 2, // 4MHz
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16)|(1<<20),
       DIV_SYSTEM_OPL3_DRUMS, 64, 0, 2,
-      DIV_SYSTEM_PCSPKR, 64, 0, 2,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));
@@ -579,7 +579,7 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_OPN_EXT, 64, 0, 2, // 4MHz
       DIV_SYSTEM_PCM_DAC, 64, 0, 44099|(15<<16)|(1<<20),
       DIV_SYSTEM_OPL3_DRUMS, 64, 0, 2,
-      DIV_SYSTEM_PCSPKR, 64, 0, 2,
+      DIV_SYSTEM_PCSPKR, 64, 0, 0,
       0
     }
   ));