Welcome to the Virtual Audio Driver by MikeTheTech! This project provides two key drivers based on the Windows Driver Kit (WDK):

• Virtual Audio Driver – Creates a virtual speaker output device and a virtual microphone input device.

Both features in the driver are suitable for remote desktop sessions, headless configurations, streaming setups, and more. They support Windows 10 and Windows 11, including advanced audio features like Windows Sonic (Spatial Sound), Exclusive Mode, Application Priority, and volume control.

A virtual audio driver set consists of:

• Virtual Audio ("fake" speaker output)

  • Essential for headless servers, remote desktop streaming, testing audio in environments without physical speakers, etc.

• Virtual Microphone ("fake" mic input)

  • Ideal for streaming setups, voice chat tests, combining or routing audio internally, or feeding software-generated audio to apps expecting a microphone input.

By installing these drivers, you can process or forward audio without physical hardware present, making them incredibly useful for various development, testing, and media production scenarios.

• OS: Windows 10 (Build 1903 and above) and Windows 11
• Architecture: x64 (tested); ARM64

1. Enable Test Signing (Optional)
   If you have a test-signed driver, you may need to enable test signing mode:

   bcdedit /set testsigning on

   Note: A production-signed driver can skip this step.

2. Open Device Manager

   • Choose Audio inputs and outputs, then in the top Action menu, choose Add Legacy Hardware.
   • Choose Install the hardware that I manually select from a list (Advanced)
   • Choose Sound, video and game controllers
   • Choose "Have Disk..." and locate the VirtualAudioDriver.inf
   • Continue with the installation.

3. Verify Installation

   • Open Device Manager.
   • Check under Sound, video and game controllers for “Virtual Audio Driver” (speaker).
   • Check under Audio inputs and outputs for “Virtual Mic Driver” (microphone).

1. Select as Default Device

   • Open Sound Settings → Output → Choose “Virtual Audio Driver” as your default output device.
   • Or use the Volume Mixer to route specific apps to the virtual speaker.

2. Remote Desktop or Streaming

   • When initiating a remote desktop session, the virtual speaker device can appear as a valid playback device.
   • Streaming or capture apps can detect the virtual speaker for capturing system audio.

3. Choosing Quality Settings

   • In Sound Settings, under Playback Devices, right-click the “Virtual Audio Driver” and select Properties → Advanced tab.
   • Choose from the newly added sample rates and bit depths (ranging from 8-bit, 8000 Hz to 32-bit, 192,000 Hz) to match your desired use case (e.g., “Telephone Quality,” “DVD Quality,” or “Studio Quality”).

4. Spatial Sound

   • In Sound Settings, right-click the device, select Properties → Spatial Sound tab, and enable Windows Sonic for Headphones or another supported format.

1. Select as Default Recording Device

   • Open Sound Settings → Input → Choose “Virtual Mic Driver” as your default input device.
   • Alternatively, in the Volume Mixer or your specific application’s audio settings, route or select the “Virtual Mic Driver” for input.

2. Supported Formats

   • The Virtual Microphone Driver supports:
     • 16-bit, 44,100 Hz
     • 16-bit, 48,000 Hz
     • 24-bit, 96,000 Hz
     • 24-bit, 192,000 Hz
     • 32-bit, 48,000 Hz

3. Use Cases

   • Voice Chat / Conference Apps: Emulate or inject audio into Zoom, Teams, Discord, etc.
   • Streaming / Broadcasting: Feed application-generated audio to OBS, XSplit, or other streaming tools.
   • Audio Testing: Confirm that your software or game engine’s microphone-handling logic works without real hardware.

4. Volume & Level Controls

   • Adjust input levels in Sound Settings → Recording tab.
   • Per-app mic levels can be configured in certain software or system volume mixers (where supported).

• Exclusive Mode (Speaker and Mic)
  By default, shared mode is enabled. For real-time, low-latency usage, open device properties, go to the Advanced tab, and uncheck “Allow applications to take exclusive control.”

• Application Priority
  Supported through Windows APIs. To prioritize a specific application for either the speaker or microphone, configure it via Windows advanced sound options or in your audio software.

• Volume/Level Management

  • For the Virtual Speaker, adjust in the main Sound Settings or the Volume Mixer.
  • For the Virtual Microphone, adjust input levels in the Recording tab of Sound Settings or in your audio software’s device preferences.

• Advanced Diagnostics: Logging and debugging tools
• New Modes & Additional Formats: Continued expansion of supported audio qualities.
• Additional Features: Such as Automatic Volume Leveling (AVL), further spatial audio improvements, and custom routing tools.

This project is built with the Microsoft Windows Driver Kit (WDK) and includes code derived from Microsoft Windows Driver Samples (notably the Sysvad / "Simple Audio Sample" audio driver).

• Windows Driver Kit (WDK): https://learn.microsoft.com/en-us/windows-hardware/drivers/download-the-wdk
• Windows Driver Samples (Sysvad): https://github.com/microsoft/Windows-driver-samples/tree/main/audio/sysvad

Original code in this repository is provided under the MIT License (see LICENSE). Third-party Microsoft sample code is provided under the Microsoft Public License (MS-PL); see THIRD_PARTY_NOTICES.md for the full license text and details.

Microsoft, Windows, and Windows Driver Kit are trademarks of Microsoft Corporation.

This project is maintained and actively improved. We welcome contributions, suggestions, and issue reports!

Thank you for using the Virtual Audio Driver!
Feel free to open issues or submit pull requests if you encounter any problems or have ideas to share. Happy audio routing!