mp3gain을 사용하여 앨범 게인으로 replaygain 태그를 작성하는 방법은 무엇입니까?

mp3gain을 설치하고 매뉴얼을 보니 앨범태그 사용시 replaygain 태그를 쓸 수 없는 것 같습니다. 하지만 아마도 내가 뭔가를 놓치고 있는 것 같습니다.

mp3gain optionally writes gain adjustments directly into the encoded data.
In  this  case, the  adjustment works with all mp3 players, i.e. no support for a special tag is required.
This mode is activated by any of the options -r, -a, -g, or -l.

   If none of the above options are given, the recommended gain change is instead written  to
   a  special  tag  in the mp3 file. In this case, the adjustment only works with mp3 players
   that support this tag.  Some mp3 players refer to this as ReplayGain.  The tag is  written
   either  in  APEv2  format  (default)  or in ID3v2 format (with -s i).  If you only want to
   print the recommended gain change (and not modify the file at all) you may use  the  -s  s
   (skip tag) option.

-a를 사용하여 앨범 태그 활성화

도울 수 있니? 감사해요