exI have tried with the latest 20Msps ADC pHAT I've assembled for the device. I've butchered soldering the 2nd ADC, and had no spare, so I skipped one of those. The issue in this is that I got 2 output pins of the ADC soldered together, so it outputs rubbish...
Long story short.. here's my setup:
and the output..
All of this is managed through the Raspberry, so I'm quite excited, and eager to develop the API to expose proper data from the RPi through wireless interactions!