Watching recorded FTA and live FTA, the audio level is the same. However, the audio in HDMI recordings are MUCH louder than live HDMI. I'm using an Apple TV 4k and a Vodafone TV, and the audio disparity is the same.
Firmware version: beyonwiz 19.3.20191106 (19.3-273-g6f501ae)
edit -
Since no one was interested in the audio level disparity, I thought I would also add that there is about a half second delay in audio that is recorded through HDMI, and then played back on the U4. There is NO audio delay playing that same file in Windows Explorer, or through Webif using the stream option.
There is no audio delay for FTA recordings.
It would be great if someone would look into these issues.