Started following some tutorial on att85 usi. Downloaded example code from make avr book.

Make AVR Examples/Chapter05_Serial-IO/serialOrgan/scaleGenerator.py

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+# scaleGenerator.py
+# Scales are in terms of times per cycle (period) rather
+#   than pitch.  
+# 
+
+import math
+
+SCALE = ['C', 'Cx', 'D', 'Dx', 'E', 'F', 'Fx', 'G', 'Gx', 'A', 'Ax', 'B']
+
+def calculateOctave(baseLength):
+    periods = [baseLength / math.exp(x*math.log(2)/12) for x in range(0, 12)]
+    periods = [int(round(x)) for x in periods]
+    return( zip(SCALE, periods) )
+
+def makePitches(basePitch, numOctaves):
+    pitchList = []
+    for octave in range(0, numOctaves):
+        for note, period in calculateOctave(basePitch / 2**octave):
+            if period < 65500:
+                noteString = note + str(octave)
+                pitchList.append((noteString,period))
+    return(pitchList)            
+    
+def makeDefines(basePitch, numOctaves):
+    pitchList = makePitches(basePitch, numOctaves)
+    defineString = "// Scale in the key of {} \n".format(basePitch)
+    defineString += "// Automatically generated by scaleGenerator.py \n\n"
+    for (note, length) in pitchList:
+        defineString += "#define  {:<5}{:>6}\n".format(note, length)
+    return(defineString)
+
+if __name__ == "__main__":
+    
+    ## Change these if you like
+    BASEPITCH = 25000
+    OCTAVES   = 8
+    OUTFILE   = "scale16.h"
+    
+    ## Write it out to a file
+    out = open(OUTFILE, "w")
+    out.write(makeDefines(BASEPITCH, OCTAVES))
+    out.close()
+
+    
+
+