Did you know you can tell when you’re about to encounter the Butcher based on changes in the music pattern?
Whenever you are in a dungeon and enter a new area with the Butcher, the current music cue will stop playing and a new one will start. When you turn back and leave the area, you will hear the old music again. That way, you know the Butcher is in the area right ahead of you.
This was discovered by GoinPostle2 who noticed the unusual changes in the music pattern.