npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@tonaljs/pitch-distance

v5.0.4

Published

Parse intervals in shorthand notation

Downloads

6,907

Readme

@tonaljs/pitch-distance tonal npm version

Pitch distance and transposition

Usage

⚠️ It's probably you don't need to use this package directly. Use tonal-note.

import { transpose, distance } from "@tonaljs/pitch-distance";
transpose("C4", "5P"); // => "G4"
distance("C4", "G4"); // => "5P"

API

transpose(note: string, interval: string) => string

Transpose a note by an interval. It returns the note name or "" if not valid parameters.

Examples:

transpose("d3", "3M"); // => "F#3"
transpose("D", "3M"); // => "F#"
["C", "D", "E", "F", "G"].map((pc) => transpose(pc, "M3"));
// => ["E", "F#", "G#", "A", "B"]

This function always returns a string:

transpose("one", "two"); // => ""

distance(from: string, to: string) => string

Find the distance between two notes. It returns the interval name, or "" if not valid parameters.

Examples:

distance("C3", "E4"); // => "10M"

If one of the note is a pitch class, the interval will be simple:

distance("C", "E"); // => "3M"
distance("C", "E4"); // => "3M"
distance("C4", "E"); // => "3M"

This function always returns a string:

distance("today", "tomorrow"); // => ""

Want more?

Take a look to @tonaljs/note or @tonaljs/interval modules.

FAQ

How do I get the note frequency and midi number?

note("C4").octave; // => 4
note("C4").midi; // => 60

How do I know if a note name is valid?

note("C4").empty; // => false
note("x").empty; // => true
note("x").name; // => ""
note("x").octave; // => undefined
// remove all invalid note names
[...].map(note).filter(n => !n.empty).map(n => n.name)

How do I know if two notes are enharmonics?

You can test the midi numbers:

note("Cb4").midi === note("B3").midi;

Or better yet, use the height property that is also present on pitch classes (in notes without octaves midi property is null):

note("Cb").height === note("B").height;

How do I change the octave of a note?

note("Cb4").pc + 5; // => "Cb5"