This is command line mp3gain 1.4.6 (http://mp3gain.sf.net),
whose output has been modified such that it runs nicely in
the Mp3dings console (only available in the testing branch).
In the Mp3dings preferences you can configure an external
application, e. g. (assuming you put mp3gain somewhere on
your path)
mp3gain -r -c "%f"
and redirect its output and error streams to the Mp3dings
console (or just import mp3gain-settings-for-mp3dings.zip).
Now, when you start mp3gain from the mp3dings context
menu you can monitor its progress in the Mp3dings console.
Note: you can use standard command line mp3gain as long as
you redirect its output to system i/o instead of the
mp3dings console.
Mp3dings - Manage mp3 meta-information Files
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