Hi. I play trumpet, soprano sax and flute, so I understand your question. Like you, I can transpose but prefer not having to. One less thing to mess up.

You can tell BIAB to continue to play in concert pitch but display a transposed part such as for Bb or Eb sax. This is done in Opt., Preferences, Notation, Transpose Options.

But it sounds like that's not what you want, since you want the second monitor to display concert for the keyboard player.

As far as I know, BIAB does not support different keys on dual monitors. In fact, I don't recall anyone on the forum talking about using dual monitors (it's in interesting idea). This info could be completely wrong, though. If I'm correct, it would make a great Wishlist Forum request. Further, you want to separate the chordsheet from the melody, if I'm reading the request correctly. I don't think you can do that, either.

About the Tranzport: I used one for many years, but it became increasingly unreliable. I think that may be a combination of its age and the fact that more wireless devices are around now. I replaced it with an iPad, for which there are a variety of apps including two by PG Music. What I don't know, because I haven't tried it, is if any of them transpose. I also don't know if you can run more than one iPad on the same system. I'll try some experiments tonight about transposing.

ps I did not realize the Tranzport could transpose! But how does that help you, since it can only display chords and not melody?

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.