Can you just record in Biab then add some fx to your vocal recording then save to wav in Biab.
Or if you don't need the chord sheet save the Biab song to wav, drop it into Audacity then set it to record the microphone.
Or if you upload your SGU I will convert it to Audacity Labels (chord markers) this will give you the chords in Audacity.

https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=632688#Post632688