| Feature | Realtek Digital Output (Optical) | USB DAC | HDMI Audio | 3.5mm analog | |---------|----------------------------------|---------|------------|---------------| | Audio quality | Depends on external DAC | Depends on DAC | Excellent | Realtek DAC | | Multi-channel PCM | ❌ No (stereo only) | ✅ Yes | ✅ Yes | ❌ Virtual surround only | | Lossless surround | ❌ No | ✅ Yes | ✅ Yes | ❌ No | | Bitstreaming Dolby/DTS | ✅ Yes | ❌ Rare | ✅ Yes | ❌ No | | Electrical isolation | ✅ Yes (optical) | ✅ Yes (isolated models) | ❌ No | ❌ No |
When using Digital Output, your computer’s volume knob often stops working. This is because the computer is sending a "pure" signal. It expects you to control the volume on the external receiver or speaker system connected to the digital port. what is realtek digital output
If you're experiencing issues with your Realtek Digital Output, try the following: | Feature | Realtek Digital Output (Optical) |