From f8c748cbb4957f3f4619fd11fb6da547e891f435 Mon Sep 17 00:00:00 2001
From: Barry Harris <44396066+barry65536@users.noreply.github.com>
Date: Sat, 19 May 2012 22:05:30 +0000
Subject: [PATCH] Support YM2151 routes in Misc pre 90s and post 90s drivers

---
 src/burn/drv/pre90s/d_bionicc.cpp  |  3 ++-
 src/burn/drv/pre90s/d_blockout.cpp |  4 +++-
 src/burn/drv/pre90s/d_ddragon.cpp  |  6 ++++--
 src/burn/drv/pre90s/d_gauntlet.cpp | 12 +++++++++---
 src/burn/drv/pre90s/d_rpunch.cpp   |  3 ++-
 src/burn/drv/pre90s/d_sf.cpp       |  4 +++-
 src/burn/drv/pre90s/d_wwfsstar.cpp |  4 +++-
 src/burn/drv/pst90s/d_aquarium.cpp |  4 +++-
 src/burn/drv/pst90s/d_ddragon3.cpp | 16 ++++++++++++----
 src/burn/drv/pst90s/d_fstarfrc.cpp |  4 +++-
 src/burn/drv/pst90s/d_gaiden.cpp   |  3 ++-
 src/burn/drv/pst90s/d_gotcha.cpp   |  3 ++-
 src/burn/drv/pst90s/d_hyperpac.cpp |  5 ++++-
 src/burn/drv/pst90s/d_kaneko16.cpp |  4 +++-
 src/burn/drv/pst90s/d_mugsmash.cpp |  4 +++-
 src/burn/drv/pst90s/d_shadfrce.cpp |  4 +++-
 src/burn/drv/pst90s/d_silkroad.cpp |  4 +++-
 src/burn/drv/pst90s/d_silvmil.cpp  |  4 +++-
 src/burn/drv/pst90s/d_suna16.cpp   | 12 +++++++++---
 src/burn/drv/pst90s/d_tumbleb.cpp  |  7 ++++++-
 src/burn/drv/pst90s/d_unico.cpp    |  4 +++-
 src/burn/drv/pst90s/d_wwfwfest.cpp |  3 ++-
 22 files changed, 87 insertions(+), 30 deletions(-)

diff --git a/src/burn/drv/pre90s/d_bionicc.cpp b/src/burn/drv/pre90s/d_bionicc.cpp
index efb170c3d..e0c4b348b 100644
--- a/src/burn/drv/pre90s/d_bionicc.cpp
+++ b/src/burn/drv/pre90s/d_bionicc.cpp
@@ -449,7 +449,8 @@ static INT32 DrvInit()
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 100.0);
+	BurnYM2151Init(3579545);
+	BurnYM2151SetAllRoutes(0.60, BURN_SND_ROUTE_BOTH);
 
 	GenericTilesInit();
 
diff --git a/src/burn/drv/pre90s/d_blockout.cpp b/src/burn/drv/pre90s/d_blockout.cpp
index deab3b710..029b05824 100644
--- a/src/burn/drv/pre90s/d_blockout.cpp
+++ b/src/burn/drv/pre90s/d_blockout.cpp
@@ -457,8 +457,10 @@ static INT32 DrvInit()
 
 	MSM6295Init(0, 1056000 / 132, 100.0, 1);
 
-	BurnYM2151Init(3579545, 100.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&BlockoutYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.60, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.60, BURN_SND_ROUTE_RIGHT);
 
 	GenericTilesInit();
 
diff --git a/src/burn/drv/pre90s/d_ddragon.cpp b/src/burn/drv/pre90s/d_ddragon.cpp
index 27d2b6682..c0c4a2ee1 100644
--- a/src/burn/drv/pre90s/d_ddragon.cpp
+++ b/src/burn/drv/pre90s/d_ddragon.cpp
@@ -1849,8 +1849,9 @@ static INT32 DrvMachineInit()
 		M6809SetWriteByteHandler(DrvDdragonM6809WriteByte);
 		M6809Close();
 	
-		BurnYM2151Init(3579545, 25.0);
+		BurnYM2151Init(3579545);
 		BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+		BurnYM2151SetAllRoutes(0.60, BURN_SND_ROUTE_BOTH);
 	
 		MSM5205Init(0, DrvSynchroniseStream, 375000, DrvMSM5205Vck0, MSM5205_S48_4B, 45, 1);
 		MSM5205Init(1, DrvSynchroniseStream, 375000, DrvMSM5205Vck1, MSM5205_S48_4B, 45, 1);
@@ -1915,8 +1916,9 @@ static INT32 Drv2MachineInit()
 	ZetMemEnd();
 	ZetClose();
 	
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&Ddragon2YM2151IrqHandler);
+	BurnYM2151SetAllRoutes(0.60, BURN_SND_ROUTE_BOTH);
 	
 	MSM6295Init(0, 1056000 / 132, 50.0, 1);
 	
diff --git a/src/burn/drv/pre90s/d_gauntlet.cpp b/src/burn/drv/pre90s/d_gauntlet.cpp
index f782eaf5c..25b24989c 100644
--- a/src/burn/drv/pre90s/d_gauntlet.cpp
+++ b/src/burn/drv/pre90s/d_gauntlet.cpp
@@ -2046,7 +2046,9 @@ static INT32 DrvInit()
 	atarigen_slapstic_init(0x038000, 104);
 	atarigen_eeprom_init();
 	
-	BurnYM2151Init(14318180 / 4, 25.0);
+	BurnYM2151Init(14318180 / 4);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.48, BURN_SND_ROUTE_RIGHT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.48, BURN_SND_ROUTE_LEFT);
 	
 	GenericTilesInit();
 	
@@ -2156,7 +2158,9 @@ static INT32 Gaunt2pInit()
 	atarigen_slapstic_init(0x038000, 107);
 	atarigen_eeprom_init();
 	
-	BurnYM2151Init(14318180 / 4, 25.0);
+	BurnYM2151Init(14318180 / 4);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.48, BURN_SND_ROUTE_RIGHT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.48, BURN_SND_ROUTE_LEFT);
 	
 	GenericTilesInit();
 	
@@ -2276,7 +2280,9 @@ static INT32 Gaunt2Init()
 	atarigen_slapstic_init(0x038000, 106);
 	atarigen_eeprom_init();
 	
-	BurnYM2151Init(14318180 / 4, 25.0);
+	BurnYM2151Init(14318180 / 4);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.48, BURN_SND_ROUTE_RIGHT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.48, BURN_SND_ROUTE_LEFT);
 	
 	GenericTilesInit();
 	
diff --git a/src/burn/drv/pre90s/d_rpunch.cpp b/src/burn/drv/pre90s/d_rpunch.cpp
index c84f12d42..d7e856ebe 100644
--- a/src/burn/drv/pre90s/d_rpunch.cpp
+++ b/src/burn/drv/pre90s/d_rpunch.cpp
@@ -572,8 +572,9 @@ static INT32 DrvInit(INT32 (*pRomLoadCallback)(), INT32 game)
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(4000000, 100.0);
+	BurnYM2151Init(4000000);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetAllRoutes(0.50, BURN_SND_ROUTE_BOTH);
 
 	UPD7759Init(0, UPD7759_STANDARD_CLOCK, DrvSndROM);
 
diff --git a/src/burn/drv/pre90s/d_sf.cpp b/src/burn/drv/pre90s/d_sf.cpp
index d994d9677..e0451cbb8 100644
--- a/src/burn/drv/pre90s/d_sf.cpp
+++ b/src/burn/drv/pre90s/d_sf.cpp
@@ -855,8 +855,10 @@ static INT32 DrvInit(INT32 initver)
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 60.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&sfYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.60, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.60, BURN_SND_ROUTE_RIGHT);
 
 	MSM5205Init(0, DrvSynchroniseStream, 384000, NULL, MSM5205_SEX_4B, 100, 1);
 	MSM5205Init(1, DrvSynchroniseStream, 384000, NULL, MSM5205_SEX_4B, 100, 1);
diff --git a/src/burn/drv/pre90s/d_wwfsstar.cpp b/src/burn/drv/pre90s/d_wwfsstar.cpp
index 2a47ce16b..125ef6536 100644
--- a/src/burn/drv/pre90s/d_wwfsstar.cpp
+++ b/src/burn/drv/pre90s/d_wwfsstar.cpp
@@ -464,8 +464,10 @@ static INT32 DrvInit()
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 45.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.45, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.45, BURN_SND_ROUTE_RIGHT);
 
 	MSM6295Init(0, 1056000 / 132, 47.0, 1);
 
diff --git a/src/burn/drv/pst90s/d_aquarium.cpp b/src/burn/drv/pst90s/d_aquarium.cpp
index 33ddf806c..24ee75891 100644
--- a/src/burn/drv/pst90s/d_aquarium.cpp
+++ b/src/burn/drv/pst90s/d_aquarium.cpp
@@ -421,8 +421,10 @@ static INT32 DrvInit()
 
 	MSM6295Init(0, 1122000 / 132, 100.0, 1);
 
-	BurnYM2151Init(3579545, 100.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&aquariumYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.45, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.45, BURN_SND_ROUTE_RIGHT);
 
 	GenericTilesInit();
 
diff --git a/src/burn/drv/pst90s/d_ddragon3.cpp b/src/burn/drv/pst90s/d_ddragon3.cpp
index 230ee61e6..c7562492a 100644
--- a/src/burn/drv/pst90s/d_ddragon3.cpp
+++ b/src/burn/drv/pst90s/d_ddragon3.cpp
@@ -1254,8 +1254,10 @@ static INT32 DrvInit()
 	ZetClose();
 	
 	// Setup the YM2151 emulation
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 	
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 1000000 / 132, 100.0, 1);
@@ -1364,8 +1366,10 @@ static INT32 DrvpInit()
 	ZetClose();
 	
 	// Setup the YM2151 emulation
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 	
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 1000000 / 132, 100.0, 1);
@@ -1471,8 +1475,10 @@ static INT32 DrvbInit()
 	ZetClose();
 	
 	// Setup the YM2151 emulation
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 	
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 1000000 / 132, 100.0, 1);
@@ -1608,8 +1614,10 @@ static INT32 CtribeInit()
 	ZetClose();
 	
 	// Setup the YM2151 emulation
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 1.20, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 1.20, BURN_SND_ROUTE_RIGHT);
 	
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 1000000 / 132, 10.0, 1);
diff --git a/src/burn/drv/pst90s/d_fstarfrc.cpp b/src/burn/drv/pst90s/d_fstarfrc.cpp
index c6b48ef8f..0c6d0c070 100644
--- a/src/burn/drv/pst90s/d_fstarfrc.cpp
+++ b/src/burn/drv/pst90s/d_fstarfrc.cpp
@@ -777,8 +777,10 @@ INT32 FstarfrcInit()
 	ZetClose();
 
 	// Setup the YM2151 emulation
-	BurnYM2151Init(8000000 / 2, 50.0);
+	BurnYM2151Init(8000000 / 2);
 	BurnYM2151SetIrqHandler(&FstarfrcYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.60, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.60, BURN_SND_ROUTE_RIGHT);
 
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 7575, 40, 1);
diff --git a/src/burn/drv/pst90s/d_gaiden.cpp b/src/burn/drv/pst90s/d_gaiden.cpp
index dbeaed544..d69a10344 100644
--- a/src/burn/drv/pst90s/d_gaiden.cpp
+++ b/src/burn/drv/pst90s/d_gaiden.cpp
@@ -1052,7 +1052,8 @@ static INT32 DrvInit()
 	ZetClose();
 
 	if (game == 1) {
-		BurnYM2151Init(4000000, 100.0);
+		BurnYM2151Init(4000000);
+		BurnYM2151SetAllRoutes(0.40, BURN_SND_ROUTE_BOTH);
 	} else {
 		BurnYM2203Init(2, 4000000, &DrvYM2203IRQHandler, DrvSynchroniseStream, DrvGetTime, 0);
 		BurnTimerAttachZet(4000000);
diff --git a/src/burn/drv/pst90s/d_gotcha.cpp b/src/burn/drv/pst90s/d_gotcha.cpp
index a8413d24a..5f158bc06 100644
--- a/src/burn/drv/pst90s/d_gotcha.cpp
+++ b/src/burn/drv/pst90s/d_gotcha.cpp
@@ -381,8 +381,9 @@ static INT32 DrvInit()
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 100.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetAllRoutes(0.80, BURN_SND_ROUTE_BOTH);
 
 	MSM6295Init(0, 1000000 / 132, 100.0, 1);
 
diff --git a/src/burn/drv/pst90s/d_hyperpac.cpp b/src/burn/drv/pst90s/d_hyperpac.cpp
index 02b95f39c..3289ad11a 100644
--- a/src/burn/drv/pst90s/d_hyperpac.cpp
+++ b/src/burn/drv/pst90s/d_hyperpac.cpp
@@ -2000,8 +2000,9 @@ static INT32 HyperpacMachineInit()
 	ZetClose();
 
 	// Setup the YM2151 emulation
-	BurnYM2151Init(4000000, 25.0);
+	BurnYM2151Init(4000000);
 	BurnYM2151SetIrqHandler(&HyperpacYM2151IrqHandler);
+	BurnYM2151SetAllRoutes(0.10, BURN_SND_ROUTE_BOTH);
 
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 999900 / 132, 100.0, 1);
@@ -2420,6 +2421,8 @@ static INT32 FinalttrInit()
 	BurnByteswap(HyperpacProtData, 0x200);
 	
 	nRet = HyperpacMachineInit(); if (nRet) return 1;
+	
+	BurnYM2151SetAllRoutes(0.08, BURN_SND_ROUTE_BOTH);
 
 	return 0;
 }
diff --git a/src/burn/drv/pst90s/d_kaneko16.cpp b/src/burn/drv/pst90s/d_kaneko16.cpp
index c4fe92362..a68511a2c 100644
--- a/src/burn/drv/pst90s/d_kaneko16.cpp
+++ b/src/burn/drv/pst90s/d_kaneko16.cpp
@@ -3007,7 +3007,9 @@ static INT32 BlazeonInit()
 	ZetClose();
 	
 	// Setup the YM2151 emulation
-	BurnYM2151Init(4000000, 25.0);
+	BurnYM2151Init(4000000);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 1.00, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 1.00, BURN_SND_ROUTE_RIGHT);
 	
 	Kaneko16FrameRender = BlazeonFrameRender;
 	
diff --git a/src/burn/drv/pst90s/d_mugsmash.cpp b/src/burn/drv/pst90s/d_mugsmash.cpp
index b03fa5020..3a11f659a 100644
--- a/src/burn/drv/pst90s/d_mugsmash.cpp
+++ b/src/burn/drv/pst90s/d_mugsmash.cpp
@@ -457,8 +457,10 @@ static INT32 DrvInit()
 
 	soundlatch = DrvSndRegs + 2;
 
-	BurnYM2151Init(3579545, 100.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&MugsmashYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 1.00, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 1.00, BURN_SND_ROUTE_RIGHT);
 
 	MSM6295Init(0, 1122000 / 132, 50.0, 1);
 
diff --git a/src/burn/drv/pst90s/d_shadfrce.cpp b/src/burn/drv/pst90s/d_shadfrce.cpp
index 5a9eaad3c..0f101b849 100644
--- a/src/burn/drv/pst90s/d_shadfrce.cpp
+++ b/src/burn/drv/pst90s/d_shadfrce.cpp
@@ -722,8 +722,10 @@ static INT32 shadfrceInit()
 		ZetClose();
 	}
 	
-	BurnYM2151Init(3579545, 50.0);		// 3.5795 MHz
+	BurnYM2151Init(3579545);		// 3.5795 MHz
 	YM2151SetIrqHandler(0, &shadfrceYM2151IRQHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 	MSM6295Init(0, 12000, 50.0, 1);		// 12.000 KHz
 	nZ80Cycles = 3579545 * 100 / nBurnFPS;
 
diff --git a/src/burn/drv/pst90s/d_silkroad.cpp b/src/burn/drv/pst90s/d_silkroad.cpp
index 3bcd3c9bc..0c50f7b57 100644
--- a/src/burn/drv/pst90s/d_silkroad.cpp
+++ b/src/burn/drv/pst90s/d_silkroad.cpp
@@ -362,7 +362,9 @@ static INT32 DrvInit()
 	SekSetReadByteHandler(0,	silkroad_read_byte);
 	SekClose();
 
-	BurnYM2151Init(3579545, 100.0);
+	BurnYM2151Init(3579545);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 1.00, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 1.00, BURN_SND_ROUTE_RIGHT);
 	MSM6295Init(0, 1056000 / 132, 45.0, 1);
 	MSM6295Init(1, 2112000 / 132, 45.0, 1);
 
diff --git a/src/burn/drv/pst90s/d_silvmil.cpp b/src/burn/drv/pst90s/d_silvmil.cpp
index 640b73bb2..3800bfe91 100644
--- a/src/burn/drv/pst90s/d_silvmil.cpp
+++ b/src/burn/drv/pst90s/d_silvmil.cpp
@@ -392,8 +392,10 @@ static INT32 DrvInit()
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 50.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&silvmilYM2151IrqHandler);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 
 	MSM6295Init(0, 1024000 / 132, 20.0, 1);
 
diff --git a/src/burn/drv/pst90s/d_suna16.cpp b/src/burn/drv/pst90s/d_suna16.cpp
index c0d5d8624..0c3d8450c 100644
--- a/src/burn/drv/pst90s/d_suna16.cpp
+++ b/src/burn/drv/pst90s/d_suna16.cpp
@@ -1532,7 +1532,9 @@ static INT32 SunaqInit()
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 
 	DACInit(0, 0, 2, bestbestSyncDAC);
 	DACInit(1, 0, 2, bestbestSyncDAC);
@@ -1606,7 +1608,9 @@ static INT32 UballoonInit()
 	*((UINT16*)(Drv68KROM + 0x03c54)) = BURN_ENDIAN_SWAP_INT16(0x600c);
 	*((UINT16*)(Drv68KROM + 0x126a0)) = BURN_ENDIAN_SWAP_INT16(0x4e71);
 
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.50, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.50, BURN_SND_ROUTE_RIGHT);
 
 	DACInit(0, 0, 1, bssoccerSyncDAC);
 	DACInit(1, 0, 1, bssoccerSyncDAC);
@@ -1681,7 +1685,9 @@ static INT32 BssoccerInit()
 	ZetMemEnd();
 	ZetClose();
 
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.20, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.20, BURN_SND_ROUTE_RIGHT);
 
 	DACInit(0, 0, 1, bssoccerSyncDAC);
 	DACInit(1, 0, 1, bssoccerSyncDAC);
diff --git a/src/burn/drv/pst90s/d_tumbleb.cpp b/src/burn/drv/pst90s/d_tumbleb.cpp
index 70deb7bea..b54ca93c2 100644
--- a/src/burn/drv/pst90s/d_tumbleb.cpp
+++ b/src/burn/drv/pst90s/d_tumbleb.cpp
@@ -2977,7 +2977,9 @@ static INT32 DrvInit(bool bReset, INT32 SpriteRamSize, INT32 SpriteMask, INT32 S
 	
 	if (DrvHasYM2151) {
 		if (!DrvYM2151Freq) DrvYM2151Freq = 3427190;
-		BurnYM2151Init(DrvYM2151Freq, 25.0);
+		BurnYM2151Init(DrvYM2151Freq);
+		BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.10, BURN_SND_ROUTE_LEFT);
+		BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.10, BURN_SND_ROUTE_RIGHT);
 		if (DrvHasZ80) { 
 			BurnYM2151SetIrqHandler(&SemicomYM2151IrqHandler);
 		}
@@ -3227,6 +3229,9 @@ static INT32 FncywldInit()
 	nCyclesTotal[0] = 12000000 / 60;
 	DrvSpriteColourMask = 0x3f;
 	
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.20, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.20, BURN_SND_ROUTE_RIGHT);
+	
 	return nRet;
 }
 
diff --git a/src/burn/drv/pst90s/d_unico.cpp b/src/burn/drv/pst90s/d_unico.cpp
index 664ac9587..cccb47b6e 100644
--- a/src/burn/drv/pst90s/d_unico.cpp
+++ b/src/burn/drv/pst90s/d_unico.cpp
@@ -1287,7 +1287,9 @@ static INT32 Zeropnt2Init()
 	
 	EEPROMInit(&zeropnt2_eeprom_interface);
 	
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_1, 0.70, BURN_SND_ROUTE_LEFT);
+	BurnYM2151SetRoute(BURN_SND_YM2151_YM2151_ROUTE_2, 0.70, BURN_SND_ROUTE_RIGHT);
 	
 	MSM6295Init(0, 1056000 / 132, 100.0, 1);
 	MSM6295Init(1, 3960000 / 132, 100.0, 1);
diff --git a/src/burn/drv/pst90s/d_wwfwfest.cpp b/src/burn/drv/pst90s/d_wwfwfest.cpp
index 3952e08b2..6501e7740 100644
--- a/src/burn/drv/pst90s/d_wwfwfest.cpp
+++ b/src/burn/drv/pst90s/d_wwfwfest.cpp
@@ -703,8 +703,9 @@ static INT32 DrvInit()
 	ZetClose();
 	
 	// Setup the YM2151 emulation
-	BurnYM2151Init(3579545, 25.0);
+	BurnYM2151Init(3579545);
 	BurnYM2151SetIrqHandler(&DrvYM2151IrqHandler);
+	BurnYM2151SetAllRoutes(0.45, BURN_SND_ROUTE_BOTH);
 	
 	// Setup the OKIM6295 emulation
 	MSM6295Init(0, 1024188 / 132, 100.0, 1);