Pedwards32 is right, assuming you have version 2015 or 2016. Use a choice in the right-hand column.

I'm wondering why the OP had an original key of Bb, though.

Finally, it does make a difference in BIAB to set the correct key. The most obvious is the correct enharmonic choice, i.e. Is it D# or Eb?



BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors