6 Channel 5.1 Optical SPDIF Sound Card USB Audio Output Adapter External for PC Sound Card Accessories - Newegg.com
MiniDSP U-DIO8 EBU/SPDIF out
USB 5.1 Multi-Channel Surround Sound Adapter With Optical Audio Input Output | eBay
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Building A 'high-end' USB Audio DAC | Hackaday
XMOS Multichannel high-quality USB to/from I2S/DSD SPDIF PCB
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HELP] Multi-Channel Audio Output from USB - Raspberry Pi Forums
Minidsp U-DIO8 USB to AES Converter Review | Audio Science Review (ASR) Forum
DIYINHK XMOS Multichannel 32ch USB to/from I2S/DSD SPDIF Interface | Dimdim's Blog
miniDSP UDIO-8 - Multichannel USB to AES-EBU interface
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
XMOS Multichannel high-quality USB to/from I2S/DSD SPDIF PCB
USB Audio Adapter External Sound Card - USB Audio Adapters | StarTech.com
exaSound E68 Multichannel DAC – NativeDSD Gear
Amazon.com: USB to Optical Spdif Toslink & 3.5mm Audio Adapter Converter, Support USB-A & USB-C Type-C Port, for PS5 PS4 NS Laptop Phone to Sound bar Speakers : Electronics