John, there are possibly two things happening here.

BIAB has several ways to do transposition, and this gives you the option to see the actual pitch being played, or not. If you want more details, write back and tell me what you want to see.

And, there is not universal agreement on what note Middle C is according to manufacturers of MIDI equipment and music software programmers. Some say C4, some say C5. Not smart.

Does that help?

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.