First post, I signed up just to report what I *think* is a bug.
Main issue: I noticed that the sound seemed quite blunt when plugging in headphones; it was then that I realized that it was because I was hearing in monaural.
I proved this to myself by loading my original Icewind Dale play through and noticed that there was the clear separation of ambient sounds and music that indicated a stereo signal in the same area.
I'm hoping this is a bug; ie some bug is stopping it from switching from monaural (when outputting to the phone's speaker), to stereo (when headphones are plugged in), because the sound/music was pretty stunning at the time, and added so much to the overall atmosphere.
EDIT: Just in case it wasn't clear, the sound is stereo on my PC version of Icewind Dale (The original non-enhanced version), but mono on my android phone.