diff --git a/plotview.cpp b/plotview.cpp
index 5459637..b2f8da5 100644
--- a/plotview.cpp
+++ b/plotview.cpp
@@ -133,8 +133,8 @@ void PlotView::setFFTAndZoom(int size, int zoom)
         spectrogramPlot->setZoomLevel(zoom);
 
     // Update horizontal (time) scrollbar
-    horizontalScrollBar()->setSingleStep(size * 10 / pow(2, zoomLevel));
-    horizontalScrollBar()->setPageStep(size * 100 / pow(2, zoomLevel));
+    horizontalScrollBar()->setSingleStep(size * 10 / zoomLevel);
+    horizontalScrollBar()->setPageStep(size * 100 / zoomLevel);
 
     updateView();
 }
@@ -199,7 +199,7 @@ void PlotView::resizeEvent(QResizeEvent * event)
 
 off_t PlotView::samplesPerLine()
 {
-    return fftSize / (int)pow(2, zoomLevel);
+    return fftSize / zoomLevel;
 }
 
 void PlotView::scrollContentsBy(int dx, int dy)
diff --git a/spectrogramcontrols.cpp b/spectrogramcontrols.cpp
index 01d3a83..70cdc9a 100644
--- a/spectrogramcontrols.cpp
+++ b/spectrogramcontrols.cpp
@@ -117,7 +117,9 @@ void SpectrogramControls::setDefaults()
 
 void SpectrogramControls::fftOrZoomChanged(int value)
 {
-    emit fftOrZoomChanged((int)pow(2, fftSizeSlider->value()), zoomLevelSlider->value());
+    int fftSize = pow(2, fftSizeSlider->value());
+    int zoomLevel = pow(2, zoomLevelSlider->value());
+    emit fftOrZoomChanged(fftSize, zoomLevel);
 }
 
 void SpectrogramControls::fileOpenButtonClicked()
diff --git a/spectrogramplot.cpp b/spectrogramplot.cpp
index a05255b..92fdee8 100644
--- a/spectrogramplot.cpp
+++ b/spectrogramplot.cpp
@@ -162,7 +162,7 @@ void SpectrogramPlot::setPowerMin(int power)
 
 void SpectrogramPlot::setZoomLevel(int zoom)
 {
-    zoomLevel = clamp(zoom, 0, (int)log2(fftSize));
+    zoomLevel = zoom;
 }
 
 int SpectrogramPlot::getHeight()
@@ -175,7 +175,7 @@ int SpectrogramPlot::getHeight()
 
 int SpectrogramPlot::getStride()
 {
-    return fftSize / pow(2, zoomLevel);
+    return fftSize / zoomLevel;
 }
 
 off_t SpectrogramPlot::lineToSample(off_t line)