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)
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