Realtek Digital Output: Better

. For standard speakers or headphones plugged directly into your PC, it is usually better to keep it disabled. When to Use Realtek Digital Output External Hardware

while your speakers are plugged into the 3.5mm "analog" jack, you will hear realtek digital output better

It is "better" only in specific scenarios where you want an external high-end device to handle the audio decoding: Surround Sound realtek digital output better