A Set-Theory based JavaScript library pitch manipulation and analysis in any tuning system that is based on equal divisions of the octave (i.e., EDO, and also known as "TET").
As such, it allows to describe collections of pitches in psycho-acoustical terms (e.g., roughness or dissonance), it implements experimental algorithms proposed in the music theory literature, and allows for standard and novel set-theory manipulations.
This library is aimed at music theorists, musicologists, and cognitive scientists working on musical research, for the creation of stimuli for experiments, and for the analysis of musical structures.
To install npm (its dependencies)
npm i edo.js
Similarly, you can do any type of import.
Client-Side CDN source example - https://www.jsdelivr.com/package/npm/edo.js?version=1.2.14&path=dist
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/edo.js"></script>```Server-Side
// NOTE: here no relative path so node will use the edojs installed from NPM
const EDO = require("edo.js").EDO;let edo = new EDO(12) //create a new EDO context with 12 divisions.
//once the object has been created, you can access its functions.
//invert pitches
edo.get.inversion([0,2,4,5,7,9,11]) //returns [0, 2, 4, 6, 7, 9, 11]
edo.convert.ratio_to_interval(3/2) //returns [7]
edo.count.pitches([0, 3, 3, 2, 4, 3, 4]) //returns [[3,3],[4,2], [2,1], [0,1]]
// (3 appears 3 times, 4 appears 2 times, etc.)
edo.is.subset([2,4],[1,2,3,4,5]) //returns true (the set [2,4] IS a subset of [1,2,3,4,5])To install development dependencies:
npm install --include=dev
To build the project
npm run build
To regenerate the docs
npm run docs
To test:
npm run test
Documentation A good place to start: EDO Class