Convert a string containing notes into frequencies
npm install notes-frequencies> Convert a string containing notes into frequencies
Born to be used with Johnny-Five's Piezo API, maybe useful for something else.
``
$ npm install --save notes-frequencies
`js
const notesFrequencies = require('notes-frequencies');
notesFrequencies('A♭4 B♭4 C4@1/2 C#4@1/4 C#4@1/4');
// => [
// [ 415.305, 1 ],
// [ 466.164, 1 ],
// [ 261.626, 0.5 ],
// [ 277.183, 0.25 ],
// [ 277.183, 0.25 ]
// ]
`
Returns an array of frequencies and their duration.
#### notes
Type: string
Notes you want to transform into frequencies and their duration.
The notes are written as follow: NoteOcatave@Duration. NoteOcatave is a value from this table, you can also write a rest as R. Duration is a value from this table.1/4 + 1/8
If a note has a dot you can't write it as , instead you can use 3/8 or 1.5/4.@Duration
If you don't write the function will return 1 as the duration of the note.
#### rest
##### value
Type: number, string, null, undefined, object, array null
Default:
The value of a rest, you can set it as everything. Set it as the mute note of the function that you'll use to generate the sound.
This value will be used also when you write something like R@1/2.
##### enable
Type: boolean false
Default:
Add a rest after each note if enabled.
##### duration
Type: number 0.125`
Default:
The duration of each rest after a note.
MIT © Raul Macarie