At first blush that looks like what I'm seeing - just the channels reversed. So, either a) there's some sort of bug/problem in HW or b) there's a problem in the code and/or my understanding. I suspect it's a)...
Unfortunately, I think the bigger problem is this forum - "Discussion Forum -> Report Bugs" category. It doesn't seem to get much/any love or visibility.
So, I've got a couple things I'm gonna try to get to the bottom of this:
- take the microphones out of the equation by using a second ESP32 to generate the data
- Create a new post in the General forum.