helmholtz

Fork of https://github.com/saebekassebil/interval-coords, using [steps, semitones] instead of [fifths, octaves]

See the teoria fork at https://github.com/erikronstrom/teoria for more info.

Parsing notes written in Helmholtz pitch notation returning intervals in steps and semitones relative to A4 (or a')

var helmholtz = require('helmholtz');

helmholtz('a\'') // -> [ 0, 0 ]
helmholtz(',,C') //  -> [ -33, -57 ]
helmholtz('d#\'') // -> [ -4, -6 ]
helmholtz('a\'\'') // -> [ 7, 12 ]

usage

var helmholtz = require('helmholtz');

helmholtz(note)

Takes a note string in the Helmholtz notation and returns an array describing the interval of that note relative to A4. The returned interval is in the format [steps, semitones] - that is, an array consisting of two numbers, the first the number of diatonic steps, the second the number of semitones between the notes.