Welcome to the forum.

The best advice I can give other horn players of transposing instruments is, always convert to concert pitch.

Having said that, here's the easy fix:

Assuming you entered the song directly from the Eb Facebook, and assuming you did not enter a key signature in BIAB (so it still says key of C), then change the key to A. This will drop the pitch so it will be right when you play your fakebook. To do this, click on the Key button and use the left-hand column to select A. Why? An alto is pitched a minor third above concert, so dropping to A drops the alto music a minor third to compensate. When you selected Eb, you went the wrong direction.

The music on the BIAB screen will be in the wrong key for your alto, so if you want to read from the screen, you can then transpose the notation. This time, you do NOT use the Key button, but instead use Preferences, Notation. Select alto sax from the pull-down Transpose menu there. Remember this is in effect and return it to normal (concert pitch) when you're done.


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.