{"id":18645270,"url":"https://github.com/danigb/music-pitch","last_synced_at":"2025-04-11T12:31:18.507Z","repository":{"id":66458327,"uuid":"44164556","full_name":"danigb/music-pitch","owner":"danigb","description":"Note names, midi, frequencies","archived":false,"fork":false,"pushed_at":"2015-10-15T17:44:20.000Z","size":160,"stargazers_count":19,"open_issues_count":1,"forks_count":2,"subscribers_count":5,"default_branch":"master","last_synced_at":"2025-03-25T13:46:30.771Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/danigb.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGELOG","contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2015-10-13T09:03:59.000Z","updated_at":"2021-09-12T14:22:30.000Z","dependencies_parsed_at":"2023-02-20T23:31:06.204Z","dependency_job_id":null,"html_url":"https://github.com/danigb/music-pitch","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danigb%2Fmusic-pitch","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danigb%2Fmusic-pitch/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danigb%2Fmusic-pitch/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/danigb%2Fmusic-pitch/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/danigb","download_url":"https://codeload.github.com/danigb/music-pitch/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248401955,"owners_count":21097328,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-07T06:15:17.080Z","updated_at":"2025-04-11T12:31:18.221Z","avatar_url":"https://github.com/danigb.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# music-pitch\n\n[![Build Status](https://travis-ci.org/danigb/music-pitch.svg?branch=master)](https://travis-ci.org/danigb/music-pitch)\n[![Code Climate](https://codeclimate.com/github/danigb/music-pitch/badges/gpa.svg)](https://codeclimate.com/github/danigb/music-pitch)\n[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](https://github.com/feross/standard)\n[![npm version](https://badge.fury.io/js/music-pitch.svg)](https://badge.fury.io/js/music-pitch)\n\n\n`music-pitch` is the bridge between midi, your app and your synthetizers. It's a small (2.5kb minified) and fast library to manipulate note names, midi notes and note frequencies.\n\n```js\nvar pitch = require('music-pitch')\n// get a note from midi\nvar note = pitch.fromMidi( ... )\n// write it to the console\nconsole.log(note)\n// give it to your synth\nsynth.play(pitch.toFreq(note))\n```\n\n## Installation\n\n#### For node\n\nInstall via npm: `npm install --save music-pitch` and require it.\n\n#### Browsers\n\nNo distribution (yet). Use webpack, browserify or a similar tool.\n\n## Usage\n\n#### Note names\n\nThe `str` function returns the [scientific notation](https://en.wikipedia.org/wiki/Scientific_pitch_notation) of a given note if valid. Can be used to check if its a valid note:\n\n```js\npitch.str('bbb') // =\u003e 'Bbb'\npitch.str('fx4') // =\u003e 'F##4'\n\nif (pitch.str(str) !== null) { /* valid pitch str */ }\n```\n\nYou can get also pitch classes (pitches without octaves), note letter, octave and accidentals:\n\n```js\npitch.pitchClass('c##5') // =\u003e 'C##'\npitch.letter('eb3') // =\u003e 'E'\npitch.octave('eb3') // =\u003e 3\npitch.accidentals('eb3') // =\u003e 'b'\n```\n\n#### Working with midi\n\nYou have two functions for converting from and to midi numbers:\n\n```js\npitch.toMidi('A4') // =\u003e '69'\npitch.fromMidi(69) // =\u003e 'A4'\n```\n\n#### Working with frequencies\n\nThe same way, you have two frequency related functions:\n\n```js\npitch.toFreq('A4') // =\u003e 440\npitch.fromFreq(440) // =\u003e 'A4'\n```\n\n#### Using different pitch notation\n\nIn the case scientific notation is not what you need, you can always use [pitch array notation](https://github.com/danigb/a-pitch) for every function that expects a string:\n\n```js\npitch.toFreq([5, 0, 3]) // =\u003e 220\n```\n\nAlso you can covert from scientific notation to pitch array notation with the pitch function:\n\n```js\npitch('A3') // =\u003e [5, 0, 3]\n```\n\n#### More...\n\nThat's all for this library, but maybe you need:\n\n- [pitch-transpose](https://github.com/danigb/pitch-transpose)\n- [music-interval](https://github.com/danigb/music-interval)\n- [music-scale](https://github.com/danigb/music-scale)\n\n## API\n\n\u003c!-- START docme generated API please keep comment here to allow auto update --\u003e\n\u003c!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN docme TO UPDATE --\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"jsdoc-githubify\"\u003e\n\u003csection\u003e\n\u003carticle\u003e\n\u003cdiv class=\"container-overview\"\u003e\n\u003cdl class=\"details\"\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"accidentals\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003eaccidentals\u003cspan class=\"signature\"\u003e(pitch)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {String}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the accidentals from a pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eArray\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L101\"\u003elineno 101\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe pitch accidentals\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.accidentals('C##3') // =\u003e '##'\npitch.accidentals('Bb4') // =\u003e 'b'\npitch.accidentals('E') // =\u003e ''\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"cents\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003ecents\u003cspan class=\"signature\"\u003e(from, to, decimals)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {Integer}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the distance in cents between pitches or frequencies\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003efrom\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003efirst pitch or frequency\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003eto\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003eother pitch or frequency\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003edecimals\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe decimal precision (2 by default)\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L201\"\u003elineno 201\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe distance in cents\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003ecents(440, 444) // =\u003e 15.66\ncents('A4', 444) // =\u003e 15.66\ncents('A4', 'A#4') // =\u003e 100\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"fromFreq\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003efromFreq\u003cspan class=\"signature\"\u003e(freq)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {String}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the pitch of a given frequency.\u003c/p\u003e\n\u003cp\u003eIt will round the frequency to the nearest pitch frequency. Use \u003ccode\u003ecents\u003c/code\u003e function\nif you need to know the difference between the the frequency and the pitch.\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003efreq\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eFloat\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe frequency\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L158\"\u003elineno 158\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003cdt class=\"tag-see\"\u003eSee:\u003c/dt\u003e\n\u003cdd class=\"tag-see\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"global.html#cents\"\u003ecents\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.fromFreq(440) // =\u003e 'A4'\npitch.fromFreq(443) // =\u003e 'A4'\npitch.cents(443, 'A4') // =\u003e ... to get the difference\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"fromMidi\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003efromMidi\u003cspan class=\"signature\"\u003e(midi)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {String}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the pitch of the given midi number\u003c/p\u003e\n\u003cp\u003eThis method doesn't take into account diatonic spelling. Always the same\npitch class is given to the same midi number.\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003emidi\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe midi number\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L119\"\u003elineno 119\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.fromMidi(69) // =\u003e 'A4'\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"letter\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003eletter\u003cspan class=\"signature\"\u003e(pitch)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {String}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet letter of the pitch (in uppercase)\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eArray\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch as string or array\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L51\"\u003elineno 51\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe letter of the pitch in uppercase\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.letter('fx') // =\u003e 'F'\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"octave\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003eoctave\u003cspan class=\"signature\"\u003e(pitch)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {Integer}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the octave of a pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eArray\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L66\"\u003elineno 66\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe octave number\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.octave('F#3') // =\u003e 3\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"pitchClass\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003epitchClass\u003cspan class=\"signature\"\u003e(pitch)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {String}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the pitch class (pitch name without octaves) from a pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eArray\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch to get the pitchClass number from\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L82\"\u003elineno 82\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe pitch class\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.pitchClass('a4') // =\u003e 'A'\npitch.pitchClass('ab') // =\u003e 'Ab'\npitch.pitchClass('cx2') // =\u003e 'C##'\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"str\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003estr\u003cspan class=\"signature\"\u003e(pitch)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {String}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet pitch name in scientific notation\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eArray\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch string or array\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L36\"\u003elineno 36\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe name of the pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.str('cb') // =\u003e 'Cb'\npitch.str('fx2') // =\u003e 'F##2'\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"toFreq\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003etoFreq\u003cspan class=\"signature\"\u003e(pitch, tuning)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {Float}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the pitch frequency in hertzs\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003etuning\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003eoptional tuning, 440 by default\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L179\"\u003elineno 179\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cul\u003e\n\u003cli\u003ethe pitch frequency\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eFloat\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.toFreq('A4') // =\u003e 440\npitch.toFreq('A3', 444) // =\u003e 222\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003cdt\u003e\n\u003ch4 class=\"name\" id=\"toMidi\"\u003e\u003cspan class=\"type-signature\"\u003e\u003c/span\u003etoMidi\u003cspan class=\"signature\"\u003e(pitch)\u003c/span\u003e\u003cspan class=\"type-signature\"\u003e \u0026rarr; {Integer}\u003c/span\u003e\u003c/h4\u003e\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eGet the midi number of a pitch\u003c/p\u003e\n\u003c/div\u003e\n\u003ch5\u003eParameters:\u003c/h5\u003e\n\u003ctable class=\"params\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eName\u003c/th\u003e\n\u003cth\u003eType\u003c/th\u003e\n\u003cth class=\"last\"\u003eDescription\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"name\"\u003e\u003ccode\u003epitch\u003c/code\u003e\u003c/td\u003e\n\u003ctd class=\"type\"\u003e\n\u003cspan class=\"param-type\"\u003eString\u003c/span\u003e\n|\n\u003cspan class=\"param-type\"\u003eArray\u003c/span\u003e\n\u003c/td\u003e\n\u003ctd class=\"description last\"\u003e\u003cp\u003ethe pitch string (or pitch array)\u003c/p\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003cdl class=\"details\"\u003e\n\u003cdt class=\"tag-source\"\u003eSource:\u003c/dt\u003e\n\u003cdd class=\"tag-source\"\u003e\u003cul class=\"dummy\"\u003e\n\u003cli\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js\"\u003eindex.js\u003c/a\u003e\n\u003cspan\u003e, \u003c/span\u003e\n\u003ca href=\"https://github.com/danigb/music-pitch/blob/master/index.js#L136\"\u003elineno 136\u003c/a\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eReturns:\u003c/h5\u003e\n\u003cdiv class=\"param-desc\"\u003e\n\u003cp\u003ethe midi number\u003c/p\u003e\n\u003c/div\u003e\n\u003cdl\u003e\n\u003cdt\u003e\nType\n\u003c/dt\u003e\n\u003cdd\u003e\n\u003cspan class=\"param-type\"\u003eInteger\u003c/span\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003ch5\u003eExample\u003c/h5\u003e\n\u003cpre class=\"prettyprint\"\u003e\u003ccode\u003epitch.toMidi('A4') // =\u003e 69\npitch.toMidi('A3') // =\u003e 57\u003c/code\u003e\u003c/pre\u003e\n\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/article\u003e\n\u003c/section\u003e\n\u003c/div\u003e\n\n*generated with [docme](https://github.com/thlorenz/docme)*\n\u003c/div\u003e\n\u003c!-- END docme generated API please keep comment here to allow auto update --\u003e\n\n## License\n\nMIT License\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdanigb%2Fmusic-pitch","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdanigb%2Fmusic-pitch","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdanigb%2Fmusic-pitch/lists"}