Case for amanero size USB adapter with SPDIF output.

The TOSlink connector(109598) and M2x5(115887) screws were purchased from Akizuki Tsusho. The Amanero-sized USB adapter was purchased from Aliexpress using an XMOS XU208. It outputs 32-bit 192kHz stereo.

There are also models with TOSlink sub-boards in step file, so copying them shouldn't be difficult. Connect the SPDIF output to the TOSlink's Vin, 3V to Vcc, and GND to GND to get optical output. On a Mac, you can change the output format in the AudioMIDI settings.