Alan, I’ll give it a basic go.

There are many rules in music notation, and if you break them it should be for a good reason. One of those is not to mix sharps and flats in the same chord because it’s confusing and harder to read. Let’s say I have this chord: C root, Eb, F#
It is better written as C, Eb, Gb

There are two rules at work in this simple diminished chord. 1) don’t mix sharps and flats, and 2) skip a letter when going up the scale.

Those two rules sometimes come into conflict. Another general practice is to use sharps in ascending melodic lines, flats when descending.

In BIAB it is critical for both sound and notation to set the key signature, but if you have a short section of music playing in another key for a few bars, BIAB can get confused. There are also some cases where I admit I don’t know why BIAB makes the choices it does, and I’ve written for symphony orchestras. But remember, composers break the rules and they don’t always agree.

For all those reasons BIAB makes it possible to select a note and Force Accidental. You can change an F# to its enharmonic equivalent Gb for example. Same pitch, but different note names where the context determines which is the better choice.

With that as background, this thread is about the Forced Accidental not quite working correctly.

Hope that helped.

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.