phillaf / tabarnotte

Play real-time midi instruments over the network

Tabarnotte

Experiment in trying to play real-time music with someone over the network.

What is done

• Browser getting midi signal from the instrument
• Playing the midi notes locally via a simple oscilliator
• Establishing a RTC connection between 2 browsers
• Playing notes over the peer-to-peer connection into the other browser's oscilliator

What is not done

• Handling more than 2 person at the time
• Deconnections / Re-connections
• Optimizing events and data for faster transfer and decoding
• Setting up the signaling server and website on a publicly reacheable place
• Choosing midi output
• This hasn't been tested in a browser other than chrome 85

How to run

• install npm dependencies docker-compose run npm install
• run the web server and the websocket serverdocker-compose up -d
• open 2 browser tabs in the same console, and verify that you get the Channel opened! message
• Chrome asks for a user interaction before it allows to play sounds. Make sure to click the "Enable Audio" button to hear the synth.

To run on a network

• Change the websocket server address in www/js/signaling.js
• In chrome, midi is blocked by default on websites that don't have an https connection. You can workaround this using the flag chrome://flags/#unsafely-treat-insecure-origin-as-secure.

The local midi+oscilliator part can be tried online here (no RTC setup yet). https://tabarnotte.com