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In the Forum: Analog Playback
In the Thread: Turntable speed analysis.
Post Subject: WavinessPosted by Paul S on: 6/13/2012
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N-set, for one thing, a certain amount of "flutter" is a normal part of analog recording processes, if indeed the test tracks are "analog" from end to end. I have no clear notion of what any (subsequent?) digital processing itself "looks like", but as I said earlier, the FM part definitely has a sort of "smoothed pulse" effect, generally speaking, and this might appear as "waves" on this particular chart. Also, like I said before, the residual carrier frequency/ies (that/those not entirely scrubbed from the wanted signal) also have a smoothing/masking effect, not to mention they are "present" in their own right, even though they are supposed to be "out of the band" under consideration.
Another question for the expert is, does everything "foreign" appear as a "wave" or as "eccentricity"? If so, then only frequency and magnitude add to these to make the chart, whatever the "cause" of it.
A last question: do the digital spikes generate their own "harmonics", and might any or all of these subsequently "dissipate" into "waves"?
Best regards,
Paul SRerurn to Romy the Cat's Site