XMOS Multichannel high-quality USB to/from I2S/DSD SPDIF PCB
How should I connect my 5.1 channel (no S/PDIF and HDMI input) Home Theater to my laptop to get true surround sound? - Quora
XMOS Multichannel high-quality USB to/from I2S/DSD SPDIF PCB
External Sound Card USB 5.1 SPDIF Input/Output Plug And Play Audio Mixer Device Adaptor for Computer Laptop for Windows for Mac OS - Walmart.com
Building A 'high-end' USB Audio DAC | Hackaday
miniDSP UDIO-8 - Multichannel USB to AES-EBU interface
Amazon.com: Cubilux Uni-Directional USB A SPDIF Input Adapter for PC, USB Optical Line-in Dongle, Toslink to USB Receiver, USB A SDPIF RX Interface Suitable for Laptop Computer【ONLY for Stereo Audio Signal】 :