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In Reply to: The room we are in is the "Vinyl Asylum" and Vinyl is an analog format. posted by Teresa on September 14, 2006 at 12:54:33:
I'm a vinyl fan, got two stereos, two TTs and have listened to 400 records maybe 20 cds on these systems in the last 4-6 months.I've seen that picture around on several occasions. It's ridiculus and misleading for people to actually believe it to be an accurate comparison of vinyl and cd.
Granted digital is a series of 1s and 0s and an analog signal is recreated from it. However it is filtered so it is smooth just like the "analog" waveform in the graph - there aren't holes and pits and gaps in the waveform we eventually listen to.
And that analog wave that's supposed to represent vinyl. Cool it looks just like the analog wave coming out of a CD player. What do the pits and valleys on a vinyl LP look like? A lot more like that "digital" waveform than the pretty analog waveform the "article" attributes to vinyl.
And to make matters worse for vinyl lovers - left and right channel information is coded and mixed up into these vinyl pits and grooves with nothing to compare to in the end to insure what the cartridge retrieves is what was "encoded". Digital is mixed up as well - but it's mixed in such a way to reduce errors and better insure what was encoded is what was retrieved.
I really enjoy listening to records but I'm embarrased by the kinds of misconceptions vinylphiles throw around trying to "prove" why they like what they like.
Geez do we have to resort to and accept rampant silliness in order to feel good about our preference for vinyl?
Give me rhythm or give me death!
Follow Ups:
Certainly it's misleading. The reconstruction of the analogue signal in a good DAC is obviously vastly more accurate than it suggests. However I really don't understand how it comes to be as good as it is - at least at high frequencies. In the extreme case, at 20kHz (not that I've been able to hear that for a few years) we are looking at trying to reconstruct the waveform from just 2.2 samples per wave. That simply isn't enough information, surely?
http://www.lavryengineering.com/documents/Sampling_Theory.pdf
I played around with this stuff - all you need is greater than two samples at any frequency in order for it to work. There really isn't any difference between 20K or 20 Hz. All that's need is greater than 2 samples and in fact more samples than at that any frequency is just not needed. Nyquist works.I'm sure there are "issues" with the redbook format but that "how thing works" picture makes me laugh!
Seems to me that getting 20K onto and off a vinyl lp is a far more challanging task yet the vinylphiles seem quite willing to ignore that reality. Last I heard was that a vinyl record was considered to have a distinquished high frequency extension if it got out to 14 Khz.
nt
this is tiresome. teresa, your intolerance is obnoxious. i too have an excellent vinyl set but also have an excellent digital set up. if i could only have one, then it'd be vinyl. your overly simplistic and poorly educated shlock is embarassing to this forum. your website it self is embarassing, especially the quack who's article you cite. get over it and move on.
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