For a while I've been toying with the idea of a Raspberry Pi as a bit bucket, which is certainly not a novel idea. I recently got the last piece I needed to try it out, and tonight I successfully tested it running eight channels. My setup was purely a "proof of concept" sort of thing, and by no means ready for field use as-is. Now that I know it can work, though, I'll probably take the next step of trying to get it into the field. Here was my test setup:
* 8 mics running into a Zoom F8 in USB interface mode
* USB cable from the F8 to the Raspberry Pi 3
* Raspberry Pi connected to the official Pi touchscreen and a USB keyboard
* Pi powered with wall wart
I was able to record all eight tracks at 16/48 on the Pi using Audacity. For the moment I am not quite sure how to change to 24-bit. It might require using different software, or I may have just not found the right setting yet. Or maybe it's not possible at all with this setup. I didn't try a higher sample rate, but Audacity gave the option.
Anyway, I don't know if this is all that interesting, but it's a fun little project that I'm finding mildly amusing.