Sound right before song begins on vinyl, what is it?


I have found on many LP's, that there will be a faint "pre-song" sound. Is this a mistake in the recording process? It is the music starting faintly before the music actually starts. Who understands this better than I do? I know we have some recording guys here. Why do we hear this on a lot of LP's? Thanks,

Bill

billpete

@tcutter 

It seems like the only explanation in that case is the vinyl flaw, which was explained by someone earlier. It is kind of hard to imagine that one sounding as an exact but faint replica of the song that is about to begin. Does it? I don't think I've ever heard it on a D2D but will pay close attention when I listen to one in the future. I have quite a few and they are among my favorites to demo something new in the system.