Chromebooks are custom-engineered to run ChromeOS. Their onboard audio processing chips—such as Intel Smart Sound Technology (SST) and Intel Sound Open Firmware (SOF)—lack native, official Windows drivers from companies like Google, Intel, or Realtek. Independent developer CoolStar created these custom, proprietary Windows drivers to close this compatibility gap. Without them, a Windows-flashed Chromebook remains completely silent. Why You Need the CoolStar SST Audio Driver
Most likely if your device has an Intel SST device with one of these Hardware IDs (from Device Manager → Details → Hardware Ids): coolstar sst audio driver download
If you run into trouble, here are some common problems and potential solutions: Chromebooks are custom-engineered to run ChromeOS
| Board Name | Device | Status / Community Reports | License Type | Critical Notes | | :--- | :--- | :--- | :--- | :--- | | | Google Pixel 2 LS (2015) | Driver tested successfully by developer. | Open-Source (Free) | An open-source free driver is available for this specific Broadwell model. | | Eve | Google Pixelbook (2017) | Audio functions work after license installation. | Paid ($10) | Requires purchasing the "CoolStar SST audio (AVS)" driver and generating a license file. The process is more complex than typical driver installation. | | Awasuki | ASUS CX1405CKA | Several community reports of audio not functioning initially; may require specific troubleshooting. | Paid | Users have reported success after multiple attempts and ensuring all steps are followed carefully. | | Teemo / CN65 | ASUS Chromebox 3 | Overall audio works, but automatic switching between audio outputs (e.g., speakers to headphones) may not function. | Paid | Community reports indicate that audio over HDMI, USB-C, and the aux port works, but a manual switch may be required. | | Karma | Acer Chromebase 24v2 | Reports of no sound output after installation, with video playback errors. | Paid | Appears to have significant compatibility issues with this hardware. | | | Eve | Google Pixelbook (2017) |
Navigate to the section on the Chrultrabook documentation site. Select your specific Intel processor family. Locate the Audio section for your device.
The drivers are strictly built for 64-bit architectures of modern Windows.