Referring back to your original post and its 4 points. converting the track you want to remain frozen but transpose can be accomplished by converting the Track to an Artist Performance File. APF's have been included in BIAB since 2011. They are very versatile and capable of much more than just transposing.

While it is best to do as much editing as possible to a track before converting, it is possible to undo, edit, erase, regenerate an APF. An existing APF can be saved, another created and this process can be repeated as many times as necessary allowing a user to revert back to any of the prior renders. Multiple APF files can be merged into a APF stem.

If I've edited a file and freeze it for more than a short temporary preservation, I consider it to be most likely in a more permanent state, my normal work flow is to convert that track to an APF. It's the safest and most advanced way possible to preserve an edited track in BIAB.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.