# note-to-frequency
> ๐ผ converts a note (scientific pitch notation) to a frequency
Latest version **1.4.1** (published 2017-01-02) ยท MIT license ยท 0 weekly downloads
## Install
```sh
npm install note-to-frequency
pnpm add note-to-frequency
yarn add note-to-frequency
bun add note-to-frequency
```
## Health
**Score 20/100 (F)** โ status: abandoned.
Positive: esm support; no vulnerabilities.
Warnings: low downloads; no types.
Negative: abandoned; low maintenance score.
## Facts
| | |
|---|---|
| Version | 1.4.1 |
| Published | 2017-01-02 |
| First published | 2016-10-08 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | ESM + CommonJS |
| Node | >=4.0.0 |
| Dependencies | 1 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Author | Geoffrey Dhuyvetters |
| Maintainers | duivvv |
| Keywords | audio, note, scientific pitch, frequency, web audio, music, music theory |
## Links
- npm: https://www.npmjs.com/package/note-to-frequency
- Repository: https://github.com/duivvv/note-to-frequency
- Homepage: https://github.com/duivvv/note-to-frequency#readme
- Issues: https://github.com/duivvv/note-to-frequency/issues
- npm.io page: https://npm.io/package/note-to-frequency
## Dependencies (1)
- [validate-note](https://npm.io/package/validate-note.md) ^1.4.0
## Recent versions
- 1.4.1 (latest) โ 2017-01-02
- 1.4.0 โ 2016-12-30
- 1.3.2 โ 2016-12-27
- 1.3.1 โ 2016-11-16
- 1.3.0 โ 2016-11-14
- 1.2.0 โ 2016-11-10
- 1.1.2 โ 2016-10-11
- 1.1.1 โ 2016-10-09
- 1.1.0 โ 2016-10-09
- 1.0.0 โ 2016-10-08
## README
# note-to-frequency
[](https://www.npmjs.com/package/note-to-frequency)
[](https://travis-ci.org/duivvv/note-to-frequency)
[](https://david-dm.org/duivvv/note-to-frequency)
[](https://coveralls.io/github/duivvv/note-to-frequency)
[](https://gitmoji.carloscuesta.me/)
> ๐ผ Converts a note (scientific pitch notation) to a frequency
### Usage
```js
import noteToFrequency from 'note-to-frequency';
const frequency = noteToFrequency('A4');
console.log(frequency); // > 440
```
### Installation
Install via [yarn](https://github.com/yarnpkg/yarn)
yarn add note-to-frequency (--dev)
or npm
npm install note-to-frequency (--save-dev)
### configuration
You can pass in extra options as a configuration object (โ required, โ optional, โ๏ธ default)
```js
import noteToFrequency from 'note-to-frequency';
const frequency = noteToFrequency('C2', {base: 446, maxOctave: 4});
console.log(note); // > 66.3
```
โ **base** ( Number ) ` โ๏ธ 440 `
๐ base frequency
โ **maxOctave** ( Number ) ` โ๏ธ 8 `
๐ max octave allowed
### Examples
see [`example`](example/script.js) folder or the [runkit](https://runkit.com/duivvv/note-to-frequency) example
### Builds
If you don't use a package manager, you can [access `note-to-frequency` via unpkg (CDN)](https://unpkg.com/note-to-frequency/), download the source, or point your package manager to the url.
`note-to-frequency` is compiled as a collection of [CommonJS](http://webpack.github.io/docs/commonjs.html) modules & [ES2015 modules](http://www.2ality.com/2014/09/es6-modules-final.html) for bundlers that support the `jsnext:main` or `module` field in package.json (Rollup, Webpack 2)
The `note-to-frequency` package includes precompiled production and development [UMD](https://github.com/umdjs/umd) builds in the [`dist` folder](https://unpkg.com/note-to-frequency/dist/). They can be used directly without a bundler and are thus compatible with many popular JavaScript module loaders and environments. You can drop a UMD build as a [`