Prologue music from Restored Textscreen Music (without ambient sounds)

I'm looking for a music used in Restored Textscreen Music mod for Candlekeep prologue speech (but obviously without speech). I'd like to create a smaller version of this mod that would merge Prologue, Chapter and Dream music with speech files extracted directly from the game, on the fly, during installation, via sox tool. I see that RTM doesn't support music during Chapters textscreens at all and including it would bloat language packages even more and would require access to 8 different versions of the game to even get these files. The mod itself doesn't support BG:EE and Ascension64 is missing in action, so I think it's worth to release something new.

The problem is I can't find CDAY1 music (used in Candlekeep prologue) without ambient sounds merged in. Even official OST seems to have them. In BG1 the same music is played without ambients and few seconds delay before music starts. Not sure how it does this magic. If anyone know where/how to get this ACM / WAV file please let me know.