Hey Joe,
What do you have set in the RealTracks preferences for "Global volume adjust" it should be set to zero db.

Also, in the RealTracks picker dialog, make sure that the "Disable RealTracks/force to MIDI" checkbox isn't selected for the tracks you are trying to assign RealTracks to.

Finally you could try deleting your preferences file ("Band-in-a-Box Preferences_X86" located in the "Band in a Box / Preferences" folder and relaunch BIAB.

BIAB will re-create a new prefs file, and it will have you re-select your MIDI driver, it's possible something got corrupted in the file.

Hopefully this helps.

- Jay


MacPro 5,1/12 core@3.46GHz -- OS X 10.15.7 -- ATI 7970 -- 32 Gig RAM -- Crucial 500GB OS SSD -- Samsung EVO 1TB Audio/Sample SSD -- BIAB 2024 -- Logic Pro X -- Cubase Elements 14 -- Too many plugins