Microtonal musical systems

Creations & Ideas
5

I see what you mean about how the intervals
are translated in notes.rb:

NOTES_TO_INTERVALS =
      {cf: -1, CF: -1, Cf: -1, cF: -1,
       cb: -1, CB: -1, Cb: -1, cB: -1,
       c:  0,  C:  0,
       cs: 1,  CS: 1, cS: 1, Cs: 1,
       df: 1,  DF: 1, Df: 1, dF: 1,
       db: 1,  DB: 1, Db: 1, dB: 1,
       d:  2,  D:  2,
       eb: 3,  EB: 3, Eb: 3, eB: 3,
       ef: 3,  EF: 3, Ef: 3, eF: 3,
       ds: 3,  DS: 3, Ds: 3, dS: 3,
       e:  4,  E:  4,
       fb: 4,  FB: 4, Fb: 4, fB: 4,
       ff: 4,  FF: 4, Ff: 4, fF: 4,
       f:  5,  F:  5,
       es: 5,  ES: 5, Es: 5, eS: 5,
       fs: 6,  FS: 6, Fs: 6, fS: 6,
       gb: 6,  GB: 6, Gb: 6, gB: 6,
       gf: 6,  GF: 6, Gf: 6, gF: 6,
       g:  7,  G:  7,
       gs: 8,  GS: 8, Gs: 8, gS: 8,
       ab: 8,  AB: 8, Ab: 8, aB: 8,
       af: 8,  AF: 8, Af: 8, aF: 8,
       a:  9,  A:  9,
       bb: 10, BB: 10, Bb: 10, bB: 10,
       bf: 10, BF: 10, Bf: 10, bF: 10,
       as: 10, AS: 10, As: 10, aS: 10,
       b:  11, B: 11,
       bs: 12, BS: 12, Bs: 12, bS: 12}

    INTERVALS_TO_NOTES = {
      0  => :C,
      1  => :Cs,
      2  => :D,
      3  => :Eb,
      4  => :E,
      5  => :F,
      6  => :Fs,
      7  => :G,
      8  => :Ab,
      9  => :A,
      10 => :Bb,
      11 => :B}

    DEFAULT_OCTAVE = 4

    MIDI_NOTE_RE = /\A:?(([a-gA-G])([sSbBfF]?))([-]?[0-9]*)\Z/

With that method, it seems like that is used for the purposes of Western music but maybe by allowing to play with the intervals then other systems could be used.

The time between posting this and now, I did some reading and it seems like my perception of something like Indian classical music wasn’t right; there are still 12 intervals but I guess the starting point is different? I’ll do some more research :slight_smile:

Thanks, you two!