Doruk Fişek has a patch against Tellico 1.2.8 for importing bitrate during the audio file import. You just have to be able to read Turkish! Or just read his email to the tellico-users email list about it.
Since I'm not adding new strings to the Tellico-1.2 branch, I'll probably just check this into SVN trunk, or the (never-to-be-released) tellico-1.3 branch. I know better than to ever really be surprised at what data or how someone uses Tellico. It's always fun to come across new stuff like this.