The sound could be better, but quite a bit. And very, very far from normal sound, so that you can hear the voice of the person at the time when the car is moving.The sound is best with the firmware from the r551MP but that is for the A7LA50 camera and crashes on the A7LA30 after a while.
Hopefully a new firmware will come out for the A7LA30 version from @Fandy or @Doreen
This is the newest firmware (r441mp) we have from Dome for the A7LA30 version so far and is better sound:
So they really need to work on A30 firmware based on A50 to improve sound.The sound was much better with the new firmware - I've got a newG90C on the way from Dome so I'm intrigued to see how that compares.
Sunny don't load that r551MP firmware as it's massively unstable - the A7LA30 just doesn't have the grunt that the higher end chip does and it keeps freezing and locking up after a few mins. It sounds better though so proves that the A7LA30 devices can be improved