24 March 2015

Fundamental intervals

Many important intervals in the 72 tone matrix, organized into 31 pitch classes (two are in italics because they lie outside the 41-tone Miracle scale).

This method could be used to determine ideal tuning of notes in a chord, if microtonal intervals are available (as in vocals, violin-type instruments and trombones).
  1. perfect prime (unison), 1/1
  2. semiaugmented prime, 64/63
  3. augmented prime, 27/26
  4. augmented prime, 21/20
  5. minor second, 16/15
  6. neutral second, 12/11
  7. neutral second, 11/10
  8. major second (less than whole tone), 10/9
  9. major second (whole tone), 9/8
  10. diminished third, 8/7
  11. augmented second ("blues" third), 7/6
  12. minor third (Pytagorean), 32/27
  13. minor third, 6/5
  14. neutral second, 11/9
  15. major third, 5/4
  16. diminished fourth, 14/11
  17. diminished fourth, 9/7
  18. semidiminished fourth, 21/16
  19. perfect fourth, 4/3
  20. semiaugmented fourth, 15/11
  21. semiaugmented fourth, 11/8
  22. augmented fourth (tritone I), 7/5
  23. diminished fifth (tritone II), 10/7
  24. semidiminished fifth, 16/11
  25. semidiminished fifth, 22/15
  26. perfect fifth, 3/2
  27. semiaugmented fifth, 32/21
  28. augmented fifth, 14/9
  29. augmented fifth, 11/7
  30. minor sixth, 8/5
  31. neutral sixth, 18/11
  32. major sixth, 5/3
  33. major sixth (Pythagorean), 27/16
  34. septimal major sixth, 12/7
  35. septimal minor "blues" seventh, 7/4
  36. minor seventh (Pythagorean), 16/9
  37. minor seventh, 9/5
  38. neutral seventh, 20/11
  39. neutral seventh, 11/6
  40. major seventh, 15/8
  41. diminished octave, 40/21
  42. diminished octave, 27/16
  43. semidiminished octave, 63/32
  44. perfect octave, 2/1

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