https://github.com/danigb/note.freq

Get frequency of a note
https://github.com/danigb/note.freq

Last synced: 13 days ago
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Get frequency of a note

• Host: GitHub
• URL: https://github.com/danigb/note.freq
• Owner: danigb
• License: mit
• Created: 2015-11-30T17:50:02.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2015-11-30T17:50:18.000Z (almost 9 years ago)
• Last Synced: 2023-04-11T13:58:27.629Z (over 1 year ago)
• Language: JavaScript
• Size: 2.93 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG
  • License: LICENSE

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README

        
# note.freq

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`note.freq` is a function (1.3kb minified) to get the frequency from a note name:

```js

var freq = require('note.freq')

freq(440, 'A3') // => 220

```

This is part of [tonal](https://github.com/danigb/tonal)

## Installation

Install via npm: `npm install --save note.freq` or use add the dist file to the html page.

## API

## `note.freq`

Get the pitch frequency in herzs with custom concert tuning

This function is currified so it can be partially applied (see examples)

### Parameters

* `tuning` **`Float`** the frequency of A4 (null means 440)

* `note` **`String or Array`** the note name

### Examples

```js

note.freq(null, 'A4') // => 440

note.freq(444, 'A4') // => 444

```

```js

// partially applied

['A4', 'A#4', 'B5'].map(note.freq(440)) // => [440, ...]

var baroque = note.freq(415)

baroque('A3') // => 207.5

```

Returns `Float` the frequency of the note

## License

MIT License