How to Install and Configure OBS-ASIO

Using a professional audio interface with OBS Studio often requires the OBS-ASIO plugin to achieve low-latency, multi-channel audio routing. This guide provides a straightforward, step-by-step walkthrough on how to download, install, and configure the OBS-ASIO plugin so you can seamlessly integrate your USB audio interface or mixer into your live streams and recordings.

Prerequisites

Before installing the plugin, ensure you have the following:

• OBS Studio installed on a Windows computer (ASIO is a Windows-specific audio protocol).
• Official ASIO Drivers installed for your specific audio interface (e.g., Focusrite Focusrite USB ASIO, Behringer USB ASIO, Universal Audio USB ASIO). Download these directly from your manufacturer’s website.

Step 1: Download the OBS-ASIO Plugin

1. Go to GitHub and search for the obs-asio repository by developer pajlada or Andersama.
2. Navigate to the Releases section on the right side of the page.
3. Download the latest installer version. For most users, the .exe installer (e.g., obs-asio-x.x.x-Installer.exe) is the easiest option. If you prefer manual installation, you can download the .zip archive.

Step 2: Install the Plugin

1. Close OBS Studio if it is currently running.
2. Run the downloaded .exe installer.
3. Follow the on-screen prompts. The installer should automatically detect your OBS Studio installation path.
4. If you used the .zip version, extract the contents and copy the obs-plugins and data folders directly into your main OBS Studio installation directory (usually C:\Program Files\obs-studio).
5. Relaunch OBS Studio.

Step 3: Configure OBS-ASIO in OBS Studio

Once installed, you must add your audio interface as an ASIO source within your scene.

1. Open OBS Studio.
2. Go to the Sources dock at the bottom of the screen.
3. Click the + (Add) button and select ASIO Input Capture from the list.
4. Name the source (e.g., “My Audio Interface”) and click OK.
5. A properties window will appear. Configure the settings as follows:
   • Device: Select your audio interface’s official ASIO driver from the drop-down menu.
   • Format: Choose your channel layout (Stereo, Mono, or Multi-channel depending on your mic setup).
   • Channel Mapping: Assign your physical interface inputs to the OBS audio channels. For example, if your microphone is plugged into Input 1 of your interface, map “OBS Channel 1” to “Input 1”.
6. Click OK to save the settings.

Troubleshooting and Best Practices

• Sample Rate Matching: Ensure your audio interface, Windows Sound Control Panel, and OBS Studio are all set to the same sample rate (typically 44.1 kHz or 48 kHz). Mismatched sample rates can cause audio distortion, crackling, or silence. You can check OBS settings under Settings > Audio.
• Buffer Size: If you experience audio dropouts, open your audio interface’s control panel and increase the ASIO buffer size (e.g., from 128 samples to 256 or 512 samples).
• No Sound: If you do not hear audio, double-check that the correct input channels are mapped in the ASIO Input Capture properties, and verify that the source is not muted in the OBS Audio Mixer.