Thank you Andrew.
I actually imported the original 1.1 firmware (from Panasonic) into Ptool, applied your settings (.ini)
and saved it. (No Audio setting manually touched in any way)
When I tried to use your GH2_10E firmware (from EOSHD 10 steps link), applying your patch to it, "HBR" MODE could not be found in the camera menu anymore.
So I figured out GH2_10E might not be the latest 1.1 firmware.
Everything works fine using patch on my 1.1 backup (bitrate, ISO up to 12 800) [b]except playback[/b].