mp3gain(1) on Linux
The text a84fff2b8df4, as Debian 4.0 (Etch) shipped it.
lossless mp3 normalizer
Flags it lists
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-? -
-T -
-a -
-c -
-d -
-f -
-g -
-h -
-k -
-m -
-o -
-p -
-q -
-r -
-s -
-t -
-u -
-v -
-w -
-x