Getting Started

RMT Compose runs in the browser. You can use the hosted app immediately, or clone the repository and run it locally.

Quick start

The fastest way to try RMT Compose is the hosted app:

https://rmt.world

Nothing to install, and it has every feature the local build has — the whole thing runs client-side. You need a browser with WebGL2: the workspace is a WebGL2 canvas and will not initialise without it.

To run it locally instead:

git clone https://github.com/3merillon/rmt-compose-poc.git
cd rmt-compose-poc
npm install
npm run dev

Vite serves on http://localhost:3000 and opens your browser for you. You need Node.js 20.19+ or 22.12+; Node 18 will not start the dev server. Installation has the full prerequisites, the production build, and troubleshooting.

The first thing to find

Once the app is open, the gear in the top bar opens the Settings panel. It is a floating, non-modal card you can leave open while you compose, with five tabs: Appearance, Arrows, Audio, Library and Scale. Theme, the interval the transpose arrows use, reverb, and how densely the workspace is packed all live there, and all of them persist across reloads.

Read these in order

1. Installation — run it locally, build it, and rebuild the Rust/WASM core
2. Your First Composition — three notes, played, saved, in five minutes
3. Core Concepts — ratios, the BaseNote, expressions, dependencies and modules

If you are using the hosted app, skip straight to Your First Composition.

Next steps

Once you have three notes on screen, the User Guide covers every feature in detail, and the Tutorials walk single paths to a result.