README.md

@tonaljs/range

@tonaljs/range is a collection of functions to create note ranges

Usage

ES6:

import { Range } from "tonal";

nodejs:

const { Range } = require("tonal");

Single module:

import Range from "@tonaljs/range";

API

Range.numeric(notes: Array<string|number>) => number[]

Create a numeric (midi) range. You supply a list of notes or numbers (peaks and valleys) and they will be connected to create complex ranges.

Arguments can be note names or midi numbers, ranges can be ascending or descending.

Range.numeric([10, 5]); // => [ 10, 9, 8, 7, 6, 5 ]
Range.numeric([-5, 5]); // => [-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5]
Range.numeric(["C5", "C4"]); // => [ 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60 ]
Range.numeric(["C4", "E4", "Bb3"]); // => [60, 61, 62, 63, 64, 63, 62, 61, 60, 59, 58]

Range.chromatic(notes: Array<string|number>, options) => string[]

Create a range of chromatic notes. The same as numeric but the result will be note names instead of midi numbers.

The optional options object defines how note names are built:

• sharps: if true sharps will be used in altered notes. Default is false
• pitchClass: if true octaves are omited. Default is false

Range.chromatic(["C2", "E2", "D2"]);
// => ["C2", "Db2", "D2", "Eb2", "E2", "Eb2", "D2"]
Range.chromatic(["C2", "C3"], { sharps: true });
// => [ "C2", "C#2", "D2", "D#2", "E2", "F2", "F#2", "G2", "G#2", "A2", "A#2", "B2", "C3" ]