ViPER4Windows

System-wide audio effects for Windows.

ViPER4Windows brings the legendary ViPER audio processing engine to Windows. It installs as a Windows Audio Processing Object (APO) that hooks into the system audio pipeline, applies ViPER effects in real-time on all audio output.

Features

• FIR Equalizer with 10, 15, 25, or 31 bands
• ViPER Bass enhancement (Natural, Pure Bass, Subwoofer modes)
• ViPER Clarity (Natural, OZone, XHiFi modes)
• Tube Simulator and AnalogX warmth processing
• Spectrum Extension
• Field Surround with stereo widening, mid image, and depth control
• Differential Surround
• Headphone Surround+ (VHE) for virtual surround on headphones
• Reverberation with full room modeling
• FET Compressor
• Playback Gain Control (AGC)
• Auditory System Protection (CURe crossfeed)
• Speaker Optimization (speaker mode)
• ViPER-DDC device correction (.vdc profiles)
• Convolver with WAV/IRS impulse responses
• Dynamic System headphone compensation

Requirements

• Windows 10 version 1809 or later (x64)
• Tested on Windows 10, theoretically supports Windows 11
• Visual Studio 2022 or later with C++ desktop workload (for building)
• Flutter SDK 3.11+ (for building the UI)
• Inno Setup 6 (for building the installer)

Building

Ensure MSBuild, flutter, and ISCC are on your PATH, then:

git clone --recursive https://github.com/likelikeslike/ViPER4Windows.git
cd ViPER4Windows
make installer

Build individual components:

make driver              # APO DLL only
make app                 # Flutter UI only
make installer           # Full build: driver + app + installer

Installation

• Download ViPER4Windows_Setup.exe from the Releases page and install it
• A reboot is required after installation for the audio driver to load
• After reboot, open the app and register the audio endpoints on the Driver Status page before using effects, a reboot may be required for registration to take effect

Presets and Profiles

User data is stored in %APPDATA%\ViPER4Windows\. You can import and export:

• Full presets (JSON) capturing all effect settings at once
• DDC profiles (.vdc) for device-specific frequency correction
• Convolver kernels (WAV/IRS) for impulse response processing
• EQ presets and Dynamic System presets individually

Settings are saved automatically between sessions

Uninstall

Run the uninstaller from Add/Remove Programs The uninstaller removes all APO registrations, restores original audio endpoint settings, and cleans up registry entries

Note that the data folder in %APPDATA%\ViPER4Windows\ is not removed by the uninstaller, you need to delete it manually

Credits

• ViPER4Android by Zhuhang and ViPER520
• ViPERDSP reverse engineering by Martmists, Iscle, and likelikeslike (ViPERDSP)