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78/71
= 2 * 3 * 13 * 71-1
162.7861 cents
sound sample

The porcupine neutral second, 78/71, provides a good generator for porcupine temperament. It is between 3\22 and 8\59, and leads to a fifth of 711.642 cents, which is 9.687 cents sharp of 3/2.