Locate the Realtek HD Audio Driver with Intel SST on the Dell support portal. How to Install the Intel High Definition DSP Driver
If you see "Intel High Definition DSP" with a yellow exclamation mark (Code 28) in , follow these steps to install it manually: intel high definition dsp driver windows 10 download link
Use the Intel® Driver & Support Assistant to automatically identify and install the correct audio DSP drivers. Locate the Realtek HD Audio Driver with Intel