diff --git a/SigGen/swift/AppDelegate.swift b/SigGen/swift/AppDelegate.swift
index 4f07643..070158e 100644
--- a/SigGen/swift/AppDelegate.swift
+++ b/SigGen/swift/AppDelegate.swift
@@ -402,7 +402,7 @@ class AppDelegate: NSObject, NSApplicationDelegate
         fineSlider.target = self
         fineSlider.action = #selector(sliderChange)
         fineSlider.toolTip = "Fine frequency"
-        fineSlider.doubleValue = 0.5
+        fineSlider.doubleValue = kFineRef
         fineSlider.tag = kTagFine
         setVertical(fineSlider, true)
 
diff --git a/SigGen/swift/SigGenView.swift b/SigGen/swift/SigGenView.swift
index 6934ea8..d3a1909 100644
--- a/SigGen/swift/SigGenView.swift
+++ b/SigGen/swift/SigGenView.swift
@@ -83,11 +83,11 @@ class SigGenView: NSView
             knobView.value = round((knobView.value * 100.0) + 1) / 100.0
 
         case kPriorKey:
-            levelSlider.doubleValue += 0.01
+            levelSlider.doubleValue += 0.00625
             levelSlider.sendAction(fineSlider.action, to: levelSlider.target)
 
         case kNextKey:
-            levelSlider.doubleValue -= 0.01
+            levelSlider.doubleValue -= 0.00625
             levelSlider.sendAction(fineSlider.action, to: levelSlider.target)
 
         default: