will this thread little bit update

sorry for my bad english!
it is useless to use:
mp3gain */*.mp3
that will say all files are the same Album

for mp3gain i use:
find "<MUSICDIR>" -type d | while read dir; do mp3gain -T -d 3 -s i "$dir"/*.[mM][pP]3;done
this search any subfolder(Album,Collection,single,VA-Album), and starts for any subfolder the mp3gain!
mp3gain -T (change tag directly, without temp-files) -d 3 (use 89+3=92db) -s i (writes only id3v2Tags)!
I only use mp3 but you can add gain-command for other formats!
Attention a problem is:
mp3gain can use wrong tagformat, that can be result in a damaged tag!

i use for mp3's tag only v2.4 with UTF8, no problems, but easytag will update tags after mp3gain usage!
you should create a testfolder and or a backup!
append:
i have test more with linux-mp3gain:
mp3gain everytime damage the id3v2 tag, the problem is two RVA tags that in wrong format!
other software can not read or will change entrys, but thats results in bigger problems like AlbumArt kill!

the only other alternate are foobar2000 under wine, but thats instable and not Batch-mode!
will search for other Method, so long!