note-transposer

    1.0.4 • Public • Published

    note-transposer npm version

    tonal

    note-transposer is a module with a function to (surprise!) transpose notes, or create transposer functions:

    var transpose = require('note-transposer')
    transpose('C3', '3m') // => 'Eb3'
     
    // create a transposer
    var major3th = transpose('3M')
    ['C', 'D', 'E'].map(major3th) // => ['E', 'F#', 'G#']

    It's also capable of add intervals, and is part of tonal

    Install

    Via npm: npm i --save note-transposer and require the function.

    Or use the distribution file (exports transpose function to window globals):

    <script src="note-transposer.min.js"></script>
    <script>console.log(transpose('C3', '3m'))</script> 

    Usage

    Note transposition

    The simplest usage is with a note name (pitch) and interval (the order doesn't matter):

    transpose('C2', '4A') // => 'F#2'
    transpose('4A', 'C2') // => 'F#2'

    Pitch class transposition

    You can transpose pitch classes (note names without octaves), and the returned value will be a pitch class:

    tranpose('A', '3M') // => 'C#'
    tranpose('A5', '3M') // => 'C#5'

    Add intervals

    If you need it you can transpose an interval:

    transpose('3M', '3M') // => '5A'

    Transposers

    Also, you can partially apply the function to get a transposer:

    var major3th = transpose('3M')
    major3th('D') // => 'F#'

    Map arrays

    Partially applied transposers allows to work with arrays seamlessly:

    ['C', 'D', 'E', 'F', 'G'].map(transpose('3M')) // => ['E', 'F#', 'G#', 'A', 'B']
    ['1P', '3m', '5P'].map(transpose('C')) // => ['C', 'Eb', 'G']

    More...

    See tonal

    License

    MIT License

    Install

    npm i note-transposer

    DownloadsWeekly Downloads

    11

    Version

    1.0.4

    License

    MIT

    Last publish

    Collaborators

    • danigb