Conversion of fbr files to mp3 file format

It doesn't seem to be possible to directly convert any kind of .fbr file to MP3 audio, which is what fbr to mp3 conversion would be. Nonetheless BB FlashBack program has the option to export its own video recordings (.fbr files) to AVI and FLV formats. Once you have these, it should be simple enough to get the audio track only using any modern multimedia converter.

Open FBR file    Open MP3 file