I hope I'm not drifting too far off topic of the difficulty of Biab, but I'll share a few ACW tips that have helped me with that particular tool.

First, a great resource to practice learning how to use the ACW is the Forum's User Showcase songs. Most times, you will have access to the key signature, tempo, style and if necessary you can PM the artist and ask if they really used a certain chord or progression. The ACW is normally quite accurate reading a Biab generated file. It's a great resource to learn about the ACW.

After working with the ACW for a while, you'll learn that the ACW repeats certain errors in reading chords consistently. I've found that D is often interpreted as Asus and Am7 the same for C. I've also found that in certain instances, it is better to use the interpreted chord rather than the actual chord and it's good to experiment with this for the best I can tell, Biab engine will read and select a different audio phrase than from reading the chord as a D. This can be quite pleasing in a musical sense.

Importing midi files of commercial songs is also a great resource to quickly populate the chord chart.

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.