Adnaco Remote host USB system is a PCIe to USB extender. There is a PCIe card that provides two USB 3.0 ports extended remotely by Fiber Optic Cables.
In an audio PC, this removes the USB interface from the noisy PC motherboard. For better audio, use a high-quality power supply on the endpoint.
I have found that this interface provides significantly improved sound quality vs. the USB ports on a typical PC Motherboard.
Adnaco also sells a four-port card that can extend to multiple endpoints. Several members of the forum have tested different SFP+ and fiber options to improve the sound even further.
You can find ordering information here: