0:          1/1               0.000  unison, perfect prime
  1:         12/11            150.637  3/4-tone, undecimal neutral second
  2:         11/10            165.004  4/5-tone, Ptolemy's second
  3:         11/9             347.408  undecimal neutral third
  4:         14/11            417.508  undecimal diminished fourth or major third
  5:         11/8             551.318  undecimal semi-augmented fourth
  6:         16/11            648.682  undecimal semi-diminished fifth
  7:         11/7             782.492  undecimal augmented fifth
  8:         18/11            852.592  undecimal neutral sixth
  9:         20/11           1034.996  large minor seventh
 10:         11/6            1049.363  21/4-tone, undecimal neutral seventh
 11:          2/1            1200.000  octave