Changing md3 tags in bulk

Howdy. I am using rythembox (like itunes) to play mp3 and I need to

change the tags in bulk. Is there any way to change an entire folder (or 
folders) to have the same tags?
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Robert Wultsch                   // \\        robert.wultsch@asu.edu
Linux User                      /(   )\              AIM:sheepsleep7
Don't fear the penguins          ^^-^^                  (602)6927564