[IDEA] SPDIF out via GPIO (No Hat!)

[Rees86]

Ok so hear me out - I'm good enough with linux to follow instructions and do basic troubleshooting but definitely no expert.  I have been playing with digital output directly through the Pi's GPIO pins to my A/V receiver.  I'm hoping to find a way to get this working on a moOde installation and then having an entry in the drop-down menu as an Output Device in the Audio settings menu.

GitHub - mill1000/raspdif: S/PDIF digital audio output via Raspberry Pi GPIO.

I tried a couple things:

Note: All testing done on a PI4 with 4GB of RAM, but from what I can tell this works on any Pi.

Attempt #1

- Fresh install of moOde 8.3.0 - 64-bit
- install git and clang
- clone git and try to make - errors.
- manage to fix errors but doesn't seem to work

Attempt #2

- Fresh install of moOde 8.3.0 - 32-bit
- install git and clang
- clone git and try to make - no errors.
- install and test using ffmpeg - works!
- clearly 64-bit is a no-go

The rest of the steps don't yield results so I'm still poking around with moOde's configuration files to see if I can find a way to have it output to the FIFO, or maybe use the loopback option.  
I'll post an update when I get something working better, but thought I'd share my initial information in case someone else here has tried something similar or knows an easy way to make this work.