It's called pre-echo and it is perfectly normal.
Music starts early
I have noticed this for some time but never got around to asking the question. Some LP's that I play, I will hear faintly the music start. Then all of a sudden the music does start. Does that make sense? In other words. At the start of an LP. You will hear very quietly the song start. Then the real song starts at the correct level. What is up with that?