diff --git a/src/samplesrc/a2pwm/hilopwm.pla b/src/samplesrc/a2pwm/hilopwm.pla
index d1afae1..0ce230d 100755
--- a/src/samplesrc/a2pwm/hilopwm.pla
+++ b/src/samplesrc/a2pwm/hilopwm.pla
@@ -39,7 +39,11 @@ word heap
 //
 // Periods of scale in second octave
 //
-byte scale[] = 166, 156, 148, 139, 132, 124, 117, 111, 104, 99, 93, 88, 83, 78
+byte scale0[] = 163, 154, 146, 137, 130, 122, 116, 109, 103, 97, 92, 87, 82, 77
+byte scale1[] =  82,  77,  73,  69,  65,  61,  58,  55,  52, 49, 46, 43, 41, 39
+byte scale2[] =  41,  39,  37,  34,  33,  31,  29,  27,  26, 24, 23, 22, 21, 19
+byte scale3[] =  21,  19,  18,  17,  16,  15,  14,  14,  13, 12, 11, 11, 10, 10
+word scale[]  = @scale0, @scale1, @scale2, @scale3
 //
 // Key mapping to note
 //
@@ -199,7 +203,7 @@ def showMainPanel
     showDuration
     showWaveform
     showLFO
-    putsxy(5, 0, "OSCILLATION OVERTHRUSTER 1.2")
+    putsxy(5, 0, "OSCILLATION OVERTHRUSTER 1.3")
     normal
     putsxy(1, 0, "1-8")
     gotoxy(34, 0); putc('<')
@@ -306,9 +310,9 @@ def playback(idx)
         for i = 0 to 13
             if keytone[i] == key
                 if current.LFO == 0
-                    hilopwm(scale[i] >> current.octave, 0, 0)
+                    hilopwm(scale.[current.octave, i], 0, 0)
                 else
-                    hilopwm(scale[i] >> current.octave, current.LFO, current.idxLFO)
+                    hilopwm(scale.[current.octave, i], current.LFO, current.idxLFO)
                 fin
                 break
             fin
@@ -404,9 +408,9 @@ def main
             for i = 0 to 13
                 if keytone[i] == key
                     if current.LFO == 0
-                        hilopwm(scale[i] >> current.octave, 0, 0)
+                        hilopwm(scale.[current.octave, i], 0, 0)
                     else
-                        hilopwm(scale[i] >> current.octave, current.LFO, current.idxLFO)
+                        hilopwm(scale.[current.octave, i], current.LFO, current.idxLFO)
                     fin
                     break
                 fin
diff --git a/src/samplesrc/a2pwm/lfo.po b/src/samplesrc/a2pwm/lfo.po
index 452e539..fbc2625 100755
Binary files a/src/samplesrc/a2pwm/lfo.po and b/src/samplesrc/a2pwm/lfo.po differ