I haven't worked with it, but there are some hardware devices out there. One such is the Voice Live Touch by TC Helicon. BIAB can do what is called Output Chords (it's an option in Preferences) and devices like these can take the melody line from their input and add harmony based on the chords being played by BIAB.

Speaking of TC Helicon, I believe PowerTracks Pro by PG Music, a separate inexpensive product, has a software version of what I just described. PowerTracks Pro is the predecessor of RealBand, but it still has one or two additional features not in RealBand.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.