Hi Sorry that no one responded to your first post.
RE. The latest update A10 ~ 1032 There was no indication that there was a recording update or any audio update envisioned,
And I have no recording experience and am unlikely to have any but will keep an eye on your post and try a few tests.
As far as I can tell, when recording both mics are being used.
- The bottom mic has more gain
- You can try taping over each in turn
See also