What's the use of the Mp3gain -r and -a parameters? 2017-08-13 23:32:07 Hi everyone,I'm currently redoing my music collection and setting everything up with Mp3gain and Vorbisgain tags. For that, I'm using the console on my Ubuntu box. There is one thing that is unclear to me though:What is the use of the -r and -a parameters? (As is "$ mp3gain -a *.mp3" or "$ mp3gain -r song.mp3")The helpfile states:-r apply Track gain automatically (all files set to equal loudness)-a apply Album gain automatically (files are all from the same album: a single gain change is applied to all files, so their loudness relative to each other remains unchanged, but the average album loudness is normalized)However, when I open an album folder and simply execute "$ mp3gain *.mp3", it will still do a full album analysis of all files in the directory without the -a parameter (I'd have to specify -e to not calculate the album gain) and I haven't been able to find a difference between using and not using -r.Can someone explain what these parameters do exactly and what the difference is or is someone willing to run a small test and see if they find something that I haven't yet?Kind regards!