Something that's still not clear to me about this recorder is the record level in 32bit float mode. I know there has been a lot of discussion and confusion about this (or should I say about the 'magnification') on the F3, and I think I understand what the F3 is doing.
I would expect that just like with the F3, a fixed gain is applied in the analog stage and then an amplification is applied in the digital domain depending on your record level setting. This would also mean that if the meters go over 0dB while recording, you can still fix that in post without problems.
However, if the record level does affect the analog gain, it would be possible to set the record level 'too high' or 'too low', introducing clipping or poor S/N.
Hopefully some of the proud new owners of the FR-AV2 can shed some light on this? I really hope it's a set-and-forget recorder where the record level doesn't really matter, apart from seeing the bars going nicely up and down on that beautiful display.
On a sidenote: If the record level doesn't really matter, than I think it's a bit odd that it's possible to change the record levels while recording. Doing so would only complicate things in post, I think...