opal-ksl.diff

diff --git a/src/chips/opal/opal.hpp b/src/chips/opal/opal.hpp
index f554920..590f38d 100644
--- a/src/chips/opal/opal.hpp
+++ b/src/chips/opal/opal.hpp
@@ -1237,12 +1237,8 @@ void Opal::Operator::SetFrequencyMultiplier(uint16_t scale) {
 //==================================================================================================
 void Opal::Operator::SetKeyScale(uint16_t scale) {
 
-    if (scale > 0)
-        KeyScaleShift = 3 - scale;
-
-    // No scaling, ensure it has no effect
-    else
-        KeyScaleShift = 15;
+    const unsigned KslShiftTable[4] = {31, 1, 2, 0};
+    KeyScaleShift = KslShiftTable[scale];
 
     ComputeKeyScaleLevel();
 }