Volume mode in the app settings for second generation streamer why

Hi,

A while back I discovered a setting that was new for me at the time. When using my nd555 in the settings menu there is a Volume mode option that can either be hybride, fixed or variable.
there is no help for the 3 settings, fixed and variable probably is selfexplained, but hybrid?
Claus

Here you go.

You should use fixed volume for best SQ.