OSC Jack

OSC Jack is a lightweight implementation of OSC (Open Sound Control) server/client written in C#, mainly aiming to provide OSC support to Unity.

System Requirements

• Unity 2021.3 or later

OSC Jack requires System.Net.Sockets that supports most platforms but a few network-restrictive platforms like WebGL.

How To Install

This package uses the scoped registry feature to resolve package dependencies. Open the Package Manager page in the Project Settings window and add the following entry to the Scoped Registries list:

• Name: Keijiro
• URL: https://registry.npmjs.com
• Scope: jp.keijiro

Now you can install the package from My Registries page in the Package Manager window.

OSC Connection

You have to create an OSC Connection file to specify a connection type, a host address and a port number. To create a new OSC Connection file, navigate to Assets > Create > ScriptableObjects > OSC Jack > Connection.

At the moment, OSC Jack only supports the UDP connection type.

You have to specify a target host address to send OSC messages (you can leave it empty for receive-only connections).

OSC Components

OSC Event Receiver

OSC Event Receiver receives OSC messages and invokes a UnityEvent with received data.

OSC Property Sender

OSC Property Sender observes a component property and sends OSC messages on changes to it.

OSC Monitor

OSC Monitor is a small utility inspecting incoming OSC messages. To open the monitor, navigate to Window > OSC Monitor.

Low-Level API

OscClient (implements IDisposable)

OscClient is a class for sending OSC messages. It supports int, float and string types. It also supports sending up to four elements within a single message.

// IP address, port number
using (var client = new OscClient("127.0.0.1", 9000))
{
  // Send two-component float values ten times.
  for (var i = 0; i < 10; i++)
  {
    yield return new WaitForSeconds(0.5f);
    client.Send("/test",       // OSC address
                i * 10.0f,     // First element
                Random.value); // Second element
  }
}

OscServer (implements IDisposable)

OscServer is a class for receiving OSC messages. You can add a delegate to MessageDispatcher to receive messages sent to a specific OSC address (or give an empty string to receive all messages).

Please note that the server invokes the delegates in the server thread. You have to queue the events for processing them in the main thread.

It supports int, float and string types. It also supports receiving up to four elements within a single message.

using (var server = new OscServer(9000)) // Port number
{
  server.MessageDispatcher.AddCallback(
    "/test", // OSC address
    (string address, OscDataHandle data) => {
        Debug.Log(string.Format("({0}, {1})",
            data.GetElementAsFloat(0),
            data.GetElementAsFloat(1)));
    }
  );
  yield return new WaitForSeconds(10);
}