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alir.io is a lightweight plugin designed to natively integrate ASIO hardware into OBS Studio for clean, multi-channel audio capture and low-latency direct monitoring.

Features

• ASIO Input Source: Capture direct audio from your ASIO interface into OBS.

  

• ASIO Output Filter: Dedicated direct monitoring. Route your ASIO input sources straight back to your ASIO hardware with low latency.

  

• Multi-channel Support: Works with Mono, Stereo, and complex surround setups (up to 7.1).

Installation

Windows :

• Installer (Recommended): Just grab the latest .exe installer from the Releases page. Run it, restart OBS Studio, and you're done.
• Manual (.zip): Download the *-Portable.zip version, extract it, and drop the data and obs-plugins folders directly into your OBS Studio installation directory (usually C:\Program Files\obs-studio). Restart OBS.

Once installed, you'll find the new ASIO options waiting for you in your Sources and Audio Filters menus.

Requirements

OBS v31.1.1 or higher (Windows x64)

Development

Building the project is fully automated using CMake Presets. Dependencies (Qt6, OBS Studio SDK, ASIO SDK) are fetched automatically.

Prerequisites :

• Visual Studio 2022 (with Desktop development with C++ workload)
• CMake 3.28+
• Inno Setup 6 (Only required for building the .exe installer)

Build Instructions (Windows x64):

# 1. Configure the project and download all dependencies
cmake --preset windows-x64

# 2. Compile the plugin
cmake --build --preset windows-x64

# 3. Create local installation (output goes to /release folder)
cmake --install build_x64 --prefix release --config RelWithDebInfo

# 4. Generate the installer (.exe)
cmake --build --preset windows-x64 --target package

Acknowledgments

A special thanks to the obs-asio project by Andersama. Their foundational work in bringing ASIO support to OBS Studio served as a major inspiration for the development of alir.io.

License & Trademarks

This project is licensed under the GPL-3.0 License.

ASIO is a registered trademark of Steinberg Media Technologies GmbH.

For more information regarding the ASIO SDK, please visit the Steinberg Developer Portal.

Support alir.io

Keep my throat from getting scratchy:D