I'm still on OS 4.11 and SPDIF works fine.
Follow these simple instructions and let me know if this helps...
1. MODE + PAD 8 (MIXER)
2. F5 (INPUT)
3. Set Input Thru to ON
4. Set Source to DIGITAL
5. Set Level to 100 (which is probably set as default. if not, turn it up)
From your DAW, play any audio file you want. Make sure whatever software you use is configured so the audio plays through your soundcard/interface's SPDIF output.
Also make sure you have the SPDIF cable connected correctly. It's possible that you may have the connection reversed. SPDIF OUT on your interface is white. SPDIF IN will be red.
When I was talking about the SPDIF being muted, I was referring to the software for the audio interface on your DAW.
Let me know if you got it working.
