The CoolStar SST Audio (WDM) driver enables sound on Windows-converted Chromebooks, supporting Broadwell and Haswell devices like the Pixelbook and HP Chromebook 13 G1. The driver (v1.0.2.0) can be downloaded via CoolStar’s GitHub or specialized driver databases. Access the repository at
coolstar/driverinstallers: Driver Installers for various ... - GitHub
Driver Installers for various chromebook drivers on Windows - coolstar/driverinstallers. coolstar/csaudiosstcatpt: Intel Broadwell SST WDM Driver
The CoolStar SST Audio Driver is a specialized software component developed by CoolStar specifically for Chromebooks running Windows. Because Chromebooks are not natively designed for Windows, standard Intel Smart Sound Technology (SST) drivers typically do not work, leaving users without audio. CoolStar’s custom drivers bridge this gap, enabling sound on hundreds of Chromebook models. Where to Download CoolStar SST Audio Drivers
To ensure the safety and compatibility of your system, you should only download these drivers from official or verified community repositories:
CoolStar's Official Site: The primary hub for all Chromebook-to-Windows resources is CoolStar.org.
CoolStar’s Windows for Chromebooks Portal: For a tailored experience, use the Windows for Chromebooks guide. By selecting your specific device model, the site will provide a direct download link for the correct driver package (SST, SOF, or ACP).
GitHub Repositories: Advanced users can find open-source driver components and installers on CoolStar’s GitHub page. Supported Devices and Compatibility
The SST audio driver is part of a larger suite that supports multiple Intel and AMD chipsets. Compatibility is generally divided by CPU generation.
AVS (Audio-Video Standard): Supports older generations like Skylake, Apollo Lake, and Kaby Lake.
SOF (Sound Open Firmware): Supports newer generations including Gemini Lake, Comet Lake, Jasper Lake, Tiger Lake, Alder Lake, and Raptor Lake. coolstar sst audio driver download
Specific Models: It has been verified that it works on models such as the Google Pixelbook (Pantheon/Eve), Acer Chromebook 514, and various HP and Asus Chromebook Flip models. Key Benefits of Using CoolStar Drivers
Full Audio Functionality: Restores both speaker output and microphone input, which are often non-functional with generic drivers.
Optimized Performance: Built specifically for the low-power audio DSPs (Digital Signal Processors) found in Chromebook hardware.
Sleep/Wake Support: Compatible with Windows power management, ensuring audio remains active after the device wakes from sleep. How to Install the Driver coolstar/csaudiosstcatpt: Intel Broadwell SST WDM Driver
To download and install the CoolStar SST Audio drivers for your Chromebook running Windows 10 or 11, you must follow the official licensing and installation process. Most modern Intel-based Chromebook audio drivers (including SST, SOF, and AVS) are paid drivers ($10 USD) that require a license linked to your hardware. 1. Official Download & Licensing
The "proper" way to obtain these drivers is through CoolStar’s official portal. Official Website : Visit the CoolStar Windows Install Guide to identify your specific device board name. Purchase License
: Drivers for Intel chipsets (Skylake through Raptor Lake) are available at the CoolStar Driver License Portal Patreon Access : You can also gain access by pledging to the CoolStar Patreon
, which allows you to create an account on the license portal to download and register your drivers. 2. Installation Requirements
Before installing the audio driver, ensure you have the necessary "helper" drivers, as the audio driver will not function without them: Chrome EC & I2C Drivers
: These are often required for the audio chip to be recognized by Windows. DSP Support CoolStar HD Audio The CoolStar SST Audio (WDM) driver enables sound
(SST/SOF) drivers provide support for Intel Skylake through Raptor Lake DSPs. 3. Support & Community
If you encounter issues during installation or need to verify compatibility for a specific board: : The community provides active support on the Chrultrabook Discord Device Compatibility : Check the CoolStar Supported Devices List
to see if your specific Chromebook model (e.g., "Gothrax", "Craask") supports paid audio.
: Avoid downloading "CoolStar" drivers from third-party driver aggregator sites (like DriverIdentifier or DrvHub), as these are often unofficial mirrors that may be outdated or lack the necessary license registration tools required for the driver to actually produce sound. board name to confirm which driver version you need? How to install Windows 10/11 on a Chromebook - CoolStar
After installation, sound should work through speakers, headphones, and mic.
The Chrultrabook community currently maintains the most up-to-date repositories for drivers previously associated with CoolStar.
coolstar-sst-audio or generic "Chromebook Audio Drivers."Some releases include a custom installer (Setup.exe). Run it as Administrator, follow prompts, and reboot. The installer may automatically handle test mode or use a signed catalog file.
The CoolStar SST driver is a niche, community-maintained solution. It may work perfectly on some devices (e.g., older Intel Atom/Celeron laptops) but cause issues on others. Always create a System Restore point before installing.
If you can’t find a verified copy of the driver, consider asking on Reddit (r/Windows10, r/Laptop) or TechPowerUp forums – but verify the download with VirusTotal before running.
The "story" of the CoolStar SST Audio driver is a key chapter in the Chromebook modding community, specifically for users who want to run Windows on hardware originally designed for ChromeOS. The Problem: Silent Chromebooks Step 5: Reboot After installation, sound should work
When enthusiasts install Windows on Chromebooks, most hardware (like the screen and keyboard) works relatively easily. However, audio is notoriously difficult because Chromebooks often use specialized Intel Smart Sound Technology (SST) or Sound Open Firmware (SOF) configurations that don't have standard Windows drivers. For years, this meant "Windows on Chromebook" projects resulted in silent laptops. The Developer: CoolStar A developer known as
became a legend in the r/chrultrabook community by writing custom drivers from scratch to solve this. CoolStar's drivers bridge the gap between the unique Chromebook hardware and the Windows operating system. The SST Audio Driver Download
The SST (and SOF) audio drivers are essential for getting internal speakers and headphone jacks to work on specific Intel-based Chromebook models.
Where to find them: Drivers are typically found on the Official CoolStar Website or through their GitHub repository.
Paid vs. Free: While many of CoolStar's tools are open-source, some of the more complex audio drivers (like those for newer Intel generations) were released as paid drivers to support the hundreds of hours of development required to reverse-engineer the hardware. Community Experience
The "story" for many users involves a mix of triumph and troubleshooting. While these drivers often bring sound to a "dead" device, users on Reddit have reported occasional bugs, such as lower volume levels compared to the original ChromeOS or specific issues with headphone jack detection. Despite this, the CoolStar drivers remain the gold standard for turning a cheap Chromebook into a fully functional Windows laptop.
| Problem | Likely Solution |
|---------|----------------|
| Driver installs but no sound | Open Services (services.msc), restart Windows Audio and Windows Audio Endpoint Builder. |
| "Driver is intended for a different platform" error | Your hardware ID isn’t in the driver’s .inf file. Manually add it (advanced) or try a different CoolStar release. |
| Microphone not working | In Sound Settings → Input, ensure the correct mic is selected. Disable "Audio enhancements". |
| Blue screen (BSOD) after install | Boot into Safe Mode, uninstall the driver, and try an older release or the official OEM driver. |
| Test mode watermark on desktop | Ignore it or remove via bcdedit /set testsigning off after confirming audio works (but driver may fail after reboot). |
Back up your current driver (optional but wise):
Disable automatic driver updates (to prevent Windows from reinstalling the broken driver):
Download the CoolStar driver zip and extract it to C:\SST_Driver.