If you do want to use Digital Output (e.g., for a surround sound system), here is how to set it up:
Many motherboard manufacturers omit Dolby/DTS licensing in newer Realtek ALC4000 series to reduce costs, leaving digital output limited to 2-channel PCM. digital output realtek
Most motherboards come equipped with a Realtek High Definition Audio chipset. The "Digital Output" refers to the S/PDIF (Sony/Philips Digital Interface) protocol. It bypasses your computer's internal Digital-to-Analog Converter (DAC) and sends a digital stream to an external device. There are two primary ways this signal is delivered: If you do want to use Digital Output (e