This indicates the SST controller is working, but the specific codec layout configuration is incorrect. Open your Windows Sound Control Panel.
This happens if you install a driver meant for a different CPU generation. Boot Windows into Safe Mode, open Device Manager, locate the driver, right-click it, and select Uninstall Device while checking the box to "Attempt to remove the driver for this device." Audio Only Works on Headphones, Not Speakers
Right-click the affected audio device and select . Go to the Driver tab and click Roll Back Driver . Summary of Best Practices
Windows will occasionally try to replace CoolStar's driver with a broken generic Intel driver. To fix this, use the Show or Hide Updates troubleshooter utility from Microsoft to block Windows from updating your sound components. 6. Premium Drivers and Future Support coolstar sst audio driver new download
: Also available as a paid solution for devices using the Sound Open Firmware (SOF) architecture.
I notice you're asking for a of the "CoolStar SST audio driver," but then requesting a paper (academic/research document). These are two very different things.
Double-check that you downloaded the driver for your exact CPU architecture. Jasper Lake drivers will not function on a Tiger Lake machine. Sound Works on Headphones but Not Internal Speakers This indicates the SST controller is working, but
Finding the right driver is crucial for success. A key step in getting your Chromebook’s audio to work is ensuring you have installed the correct version of the driver for your specific hardware. The table below summarizes the main drivers available, based on the information found in driver repositories.
Note: AMD-based Chromebooks (Stoney Ridge, Cezanne) use entirely different drivers and are not covered by the Intel SST driver package. Step-by-Step Installation Guide
| Driver Name | Manufacturer | Version | Target Platforms / Hardware IDs | Key Features / Notes | | :--- | :--- | :--- | :--- | :--- | | | CoolStar | 1.0.7.0 | For devices with Hardware ID: CSAUDIO\ADSP&CTLR_VEN_8086&CTLR_DEV_9D70 | A version specifically for certain SST devices requiring a signed license. | | CoolStar SOF Audio | CoolStar | 1.0.5.0 | For devices with Hardware ID: CSAUDIO\ADSP&CTLR_VEN_8086&CTLR_DEV_4DC8 | An alternative open-source audio solution for Intel platforms. | | CoolStar Audio (Haswell/Broadwell) | CoolStar | Open Source | Tested on Google Pixel 2 (i7-5500U) | An open-source alternative for older Intel architectures. Requires a binary blob ( IntcSST2.bin ) for operation. | | CoolStar SST Audio (AVS) | CoolStar | Varies | Often a paid, licensed version (approx. $10) for newer Intel hardware (e.g., Skylake+) | A premium driver that typically offers better stability and performance but requires a paid license file. | Boot Windows into Safe Mode, open Device Manager,
Before looking for a new download, you must verify your Chromebook's processor generation. CoolStar's audio drivers are tailored to specific Intel CPU architectures. Installing the wrong driver will cause system instability or Blue Screen of Death (BSOD) errors. Intel Celeron N4000/N4100 series. Comet Lake (CML): 10th Gen Intel Core processors.
: Some models still use specific Realtek installers provided for free on the official site. How to Get the Drivers
CoolStar developed a custom audio pipeline wrapper. It forces Windows to recognize and utilize the Chromebook’s internal digital signal processor (DSP) and amplifiers (such as Maxim or Realtek chips), restoring sound to internal speakers and the 3.5mm headphone jack. 2. Check Device Compatibility Before Downloading
This is a common bug on specific board layouts. Check the CoolStar status page to see if your specific board name requires a specialized "audio topology" patch.
Right-click the installation file and select "Run as Administrator" .