I'm still testng the miyo, it looks really good so far.
Odroid booted up fine into lubuntu.
Also passed the usb 2.0 power spec and powered the miyo correctly.
The preamp part of this, power, and getting everything to work together is the challenge. 2 channel preamp is easy enough to fit into the remaining board space. 4 channels, probably doable, 6 is stretchng things a bit. And keep in mind this is stereo recording into a stereo adc, not multi channel adc.
Ultimately I'd like to have this footprint turn into a 6-8 channel stereo mixer but I don't think it's possible with my current iq. If preamp metering and serial control was done on a smartphone then it's possible but now it's 3 boxes: preamp, adc, and smartphone, all with room enough for a large enough battery. I'm drawing the line at 2 boxes.