The only tavern music mod that I've ever tried,
Musica Prima Tavern Music? by Hammerfist, had this same problem. The tavern music, triggered by an activator, would sometime conflict with the soundtrack and both musical compositions would play at the same time. It was like a Charles Ives composition.

Have you checked out Shezrie's Villages? She made several taverns that come with special music that plays only in tavern cells. I know I spent quite a bit of time in her Pell's Gate tavern and I don't recall hearing the soundtrack while I was there. If I had to guess I'd say she probably scripted the game's music slider to 0 while the player is inside a tavern cell.
This post has been edited by Pseron Wyrd: Nov 3 2013, 06:23 AM