What does it mean when a clipped waveform on vinyl is "sloped&quo 2008-10-09 21:27:01 Normally I'm not a huge fan of crying on a forum for help but I'm at my wit's end on this one.These are CD vs vinyl waveform plots. The CD plots are the ones with the razor-flat horizontal clipping lines. The vinyl plots are the ones with the sloped lines at the same locationsWhat causes this sloping? I'm having a really hard time coming up with an agreeable explanation. Originally I thought it was rumble, but it is occurring at too high a frequency (coming and going in the course of under 10ms) to be that. A significant HF boost could cause this but a comparison of the spectral content of cd vs vinyl does not show anything like that happening. Some sort of allpass filter might explain this (that some frequencies just have a far different group delay between formats), but I asked at PSW if they've ever heard of using an allpass in mastering, and one vinyl engineer shot that idea down cold.This is an extremely important question because some mastering engineers are using these waveform plots as supporting evidence to show that the vinyl masters are different from and superior to the CD masters. That is, their arguments are that: the peak content is higher in general on the LPs; and in the clipping regions, the "attack" part of the clipping is almost invariably higher in magnitude than the later "decay" portion, so that more transient content is being preserved on the LP.I think those arguments are bollocks - the duration of the clipping is the same between the masters, so how can one be intrinsically less clipped than another? - but nobody seems to be buying that argument. Of course, if this position on vinyl superiority were to be accepted, virtually every vinyl record out there would be shown to be superior, because virtually all of them (in my experience) exhibit this kind of sloping. And IMHO that's a fundamentally wrong position to take on mastering that will needlessly waste listener money and lead to regressions in sound quality.Am I missing something fundamental here? If not, what kind of evidence can I show that these vinyl masterings can be obtained by applying distortions to the CD masters?