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

Here’s a relevant thread:  pre-echo

https://forum.audiogon.com/discussions/turntable-pre-echo-sound

@drbond 

Thanks for an interesting read. Seems that there can be a couple of reasons. I "think" most of what I hear is the tape bleed through type but who knows. I'll have to pay attention to when I hear it and try to observe what might be the cause. No reason other than curiosity. I had considered that it may go on through an entire album or entire song but it is lost as the "intended" music takes over. Kind of like overcoming a tape hiss, tube hiss or minor surface noise (noise floor, I guess). It's never been a bother, just a matter of curiosity. Thanks.

It’s called print-through and it’s a devilish problem when remastering older recordings.  The master tape is stored in less than ideal conditions (like metal shelving!) and the magnetic signal bleeds through from one layer to another.  Any LP that’s been mastered from older tapes can suffer from it.

The company I work for employs a brilliant technician who actually found a way to cancel out much of the problem.

I always thought this was mainly caused by the disc cutting process, where big modulations of the groove cause much smaller modulations of the adjacent, already cut, silent lead-in groove.  There is a trade-off in groove separation - too big and less music can be stored on a side, and too close where you get ... what you describe!  If it is from the record cutting process, expect the pre-echo to always be about 2 seconds ahead (at 33-rpm)

Audible pre echo, cool topic.

In the afore mentioned thread I was wondering how long it was going to be before somebody referenced "Whole Lotta Love?"  At this point it would seem artificial if we didn’t hear it. Less organic not authentic. Our brains and conscious would dismiss it. 

To answer the question of was the pre echo intentional or not on Whole Lotta Love? It’s a totally cool effect and it would seem that it was done on purpose. But if it wasn’t, all of the details that came together in that moment kind of reminds me of golf getting a hole in one; just perfect.