256/243
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256/243 |8 -5>
90.225 cents
File:Jid 256 243 pluck adu dr220.mp3 sound sample
The Pythagorean limma, or Pythagorean semitone, is the interval of size 256/243 = 2^8/3^5 (about 90.2¢), which is the diatonic semitone in Pythagorean tuning. It can be generated by stacking five 4/3 just perfect fourths and octave-reducing the resulting interval.