diff --git a/src/drivers/Qt/ConsoleSoundConf.cpp b/src/drivers/Qt/ConsoleSoundConf.cpp
index 93a71539..8170e2f3 100644
--- a/src/drivers/Qt/ConsoleSoundConf.cpp
+++ b/src/drivers/Qt/ConsoleSoundConf.cpp
@@ -189,10 +189,10 @@ ConsoleSndConfDialog_t::ConsoleSndConfDialog_t(QWidget *parent)
 
 	frame = new QGroupBox(tr("Triangle"));
 	vbox2 = new QVBoxLayout();
-	triLbl = new QLabel("255");
+	triLbl = new QLabel("256");
 	vslider = new QSlider(Qt::Vertical);
 	vslider->setMinimum(0);
-	vslider->setMaximum(255);
+	vslider->setMaximum(256);
 	setSliderFromProperty(vslider, triLbl, "SDL.Sound.TriangleVolume");
 
 	vbox2->addWidget(triLbl);
@@ -204,10 +204,10 @@ ConsoleSndConfDialog_t::ConsoleSndConfDialog_t(QWidget *parent)
 
 	frame = new QGroupBox(tr("Square1"));
 	vbox2 = new QVBoxLayout();
-	sqr1Lbl = new QLabel("255");
+	sqr1Lbl = new QLabel("256");
 	vslider = new QSlider(Qt::Vertical);
 	vslider->setMinimum(0);
-	vslider->setMaximum(255);
+	vslider->setMaximum(256);
 	setSliderFromProperty(vslider, sqr1Lbl, "SDL.Sound.Square1Volume");
 
 	vbox2->addWidget(sqr1Lbl);
@@ -219,10 +219,10 @@ ConsoleSndConfDialog_t::ConsoleSndConfDialog_t(QWidget *parent)
 
 	frame = new QGroupBox(tr("Square2"));
 	vbox2 = new QVBoxLayout();
-	sqr2Lbl = new QLabel("255");
+	sqr2Lbl = new QLabel("256");
 	sqr2Slider = new QSlider(Qt::Vertical);
 	sqr2Slider->setMinimum(0);
-	sqr2Slider->setMaximum(255);
+	sqr2Slider->setMaximum(256);
 	setSliderFromProperty(sqr2Slider, sqr2Lbl, "SDL.Sound.Square2Volume");
 
 	vbox2->addWidget(sqr2Lbl);
@@ -234,10 +234,10 @@ ConsoleSndConfDialog_t::ConsoleSndConfDialog_t(QWidget *parent)
 
 	frame = new QGroupBox(tr("Noise"));
 	vbox2 = new QVBoxLayout();
-	nseLbl = new QLabel("255");
+	nseLbl = new QLabel("256");
 	nseSlider = new QSlider(Qt::Vertical);
 	nseSlider->setMinimum(0);
-	nseSlider->setMaximum(255);
+	nseSlider->setMaximum(256);
 	setSliderFromProperty(nseSlider, nseLbl, "SDL.Sound.NoiseVolume");
 
 	vbox2->addWidget(nseLbl);
@@ -249,10 +249,10 @@ ConsoleSndConfDialog_t::ConsoleSndConfDialog_t(QWidget *parent)
 
 	frame = new QGroupBox(tr("PCM"));
 	vbox2 = new QVBoxLayout();
-	pcmLbl = new QLabel("255");
+	pcmLbl = new QLabel("256");
 	pcmSlider = new QSlider(Qt::Vertical);
 	pcmSlider->setMinimum(0);
-	pcmSlider->setMaximum(255);
+	pcmSlider->setMaximum(256);
 	setSliderFromProperty(pcmSlider, pcmLbl, "SDL.Sound.PCMVolume");
 
 	vbox2->addWidget(pcmLbl);