notecoord

A data package containing the relative intervals between notes in the Western music system. The coordinates are in the format of an array: [steps, semitones] relative to C.

Thus c's coord is [0, 0], while d's is [1, 2] because going to the note d in the same octave as c requires going one diatonic step and two semitones up.

var coords = require('notecoord');

// Get the coord of a note name (relative to C)
coords('a') // -> [5, 9]

// Get the coord of note A4 (relative to C0)
coords.A4 // -> [33, 57]

// Access all the notes
coords.notes /* -> {
  c: [0, 0],
  d: [1, 2],
  e: [2, 4],
  f: [3, 5],
  g: [4, 7],
  a: [5, 9],
  b: [6, 11],
  h: [6, 11]
} */

Above is everything this module does.