I just googled Finale 2011 and read that it can export MP3, Wav, Midi and MusicXML. So with BiaB you have three options, as it can’t import MusicXML files. The question becomes what exactly do you want to do? If you have either MP3 or wav files you can bring them into BiaB and generate an accompaniment around them but you can not change the audio tracks. If you have midi you can do the same but you have the option of editing your Finale midi tracks. Either way BiaB can determine, or at least come close, what chords you are using if you have a polyphonic track(s) such as a piano and bass. You can edit the chords after they are in BiaB. Or you can add the chords from scatch if you want.

I hope this helps.

Walmart had to remove 50,000 milk cartons from their store.
The labels have to be changed from "open here" to "open at home"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware