React sequencer is an interactive web instrument that allows users to create unique drum loops and rhythms. This project is built on React, Teoria.js and Tone.js.

Try it out here!

Clone this repo and install the dependencies:

git clone https://github.com/jaqarrick/react-sequencer
cd react-sequencer
npm i

Start the dev server with npm start or yarn start.

The sequencer's main functionality stems from the song function in App.js. When startStopLoop is called the Tone transport loop begins and song is called, which increases a beat counter. playInstruments will fire triggerAttackRelease on every instrument who's beat signature matches the counter.

The UX/UI is divided into unique React components. The controls directory contains components for Controls.js, which allows users to play/pause the sequencer, add a new instrument, and open additional options defined in SequencerOptions.js.

The selector directory is divided into a beat visualizer and a beat selector. Selector.js also includes effects and note options, defined in SelectorOptions.js

• Sample upload: allow for users to upload their own samples to use in the sequencer.

• Mobile support.
• More instrument effects.

• Audio becomes distorted after continued use. This is bug that I've noticed frequently when using Tone with multiple instruments and could be memory/CPU related.

This project relies heavily on Yotam Mann's Tone.js, a framework built on the Web Audio API.

The note selection in SequencerOptions.js also uses Jakob Miland's Javascript music theory library TeoriaJS.