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https://github.com/sehugg/8bitworkshop.git
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35 lines
919 B
Python
35 lines
919 B
Python
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#!/usr/bin/python
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import sys, math
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test_notes = int(sys.argv[1]) or 49
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final_notes = int(sys.argv[2]) or 64
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basehz = 3579545/32.0
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results = []
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for a440 in range(4300,4500):
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error = 0
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for note in range(1,test_notes):
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notehz = a440 / 10.0 * math.pow(2.0, (note - 49) / 12.0);
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period = int(round(basehz / notehz))
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tonehz = basehz / period
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error += abs(notehz-tonehz)
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#print a440,note,notehz,notehz-tonehz,period
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#if a440 == 4405:
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# print '%d,%f,%d' % (note,tonehz-notehz,period)
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results.append((error, a440))
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results.sort()
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best_error, best_a440 = results[0]
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best_a440 /= 10.0
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print '//', best_a440, best_error, test_notes
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print "const int note_table[%d] = {" % final_notes
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for note in range(0,final_notes):
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notehz = best_a440 * math.pow(2.0, (note - 49) / 12.0);
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period = int(round(basehz / notehz))
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print '%d,' % period,
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print "};"
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