Quote Originally Posted by carsten_h View Post
Both programs can write both tags. And the result is nearly the same (tested only with a few files).
But interestingly foobar is writing the tag names in lowercase letters: "replaygain_track_gain" and dBpoweramp is writing a lot more tags an the tagnames are written in uppercase letters (this is the format I normally saw for tags).

Thank you both for your very fast help!
yes, you can use either foobar2000 (free) or dbpa (paid). In the old days, I used an "action" within mp3tag to read the RG tags and create an iTunNorm tag based on the RG info so that I had SOUNDCHECK values for playing in my iPod.