[pbelkner]

Originally Posted by nand chan

Okay, but why don't you just use the regular SoX plugin with a normal reference decoder?

Because I like to have everything under my own control, even the fine points not visible as an option to the end user. In particular this holds for ReplayGain and EBU R128 compliant playback, available via this plugin-in also for video (at least when packed as MKV.)