Look for "Realtek Audio Driver with Dolby Features" or "Dolby Digital Plus Driver".
Upgrading to the Dolby Digital Plus 7.3-2.2 driver introduces an active software layer that cleans up raw audio streams. This results in a wider soundstage, richer bass response, and crystal-clear high frequencies that generic drivers simply cannot replicate. Dolby Digital Plus Audio Driver 7.3-2.2 Download
Dolby Digital Plus Audio Driver version 7.3.2.2 is a legacy driver often required for proper functionality of the Dolby Home Theater or Dolby Advanced Audio software on older hardware, particularly from manufacturers like How to Download and Install Look for "Realtek Audio Driver with Dolby Features"