In my free time I've been making some custom musical themes for areas in Baldur's gate 2 that didn't have their own unique theme, especially when they are areas that are important to the main plot. Just thought I would share my interpretations for any audiophiles who enjoy video game soundtracks like I do!
This is a list that I hope to update every so often whenever a new idea crops up (for example I hope to make a Suldanessellar theme at some point), we'll see whether my schedule allows it.
Government district (AR1000):
Ust Natha (AR2200):
The Abyssal realm (AR2900):