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Frequency Response of Vinyl, Split from "To get into vinyl, or not?" (TOS #5)
almostmitch
post Dec 3 2012, 20:15
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QUOTE (botface @ Dec 3 2012, 13:49) *
I guess you can expect a factory installed arm/cartridge to be set up properly. I'd still want to check though even if only for reassurance that things haven't gone "off" in transit.


This was something I considered. I will most likely double check things, because as you implied, you never know what kind of beating the box took in transit.
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BFG
post Dec 4 2012, 00:16
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This whole conversation has me intrigued about the technical limitations of vinyl. For example, is there a minimum or maximum frequency that can be "encoded" in vinyl (akin to the ~20Hz and 44.1kHz cutoffs on digital CDs)? Does this differ for 33s, 45s, 78s? Is there a way (based on the needle tip and equipment setup) for a knowledgeable person to precalculate the bands that the most noise interference will likely be in, and thus minimize or remove it? Etc.

It's particularly pertinent as I'm planning to attempt a vinyl-to-FLAC encoding soon.

This post has been edited by BFG: Dec 4 2012, 00:17
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mzil
post Dec 4 2012, 19:10
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Unlike CD, vinyl has no inherent high frequency limit, in theory.

In regards to frequency response, FR, don't worry about the overall bandwidth limits, worry about the number of dB that the overall playback system (LP record condition, phono cartridge, phono preamp) deviate from being perfectly flat in the audible region. That's what matters in terms of audibility.

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Ed Seedhouse
post Dec 4 2012, 23:11
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QUOTE (mzil @ Dec 4 2012, 10:10) *
Unlike CD, vinyl has no inherent high frequency limit, in theory.


This is wrong, i believe. Vinyl has inherent theoretical high and low end frequency limits due to the material medium. It also has inherent limits in other areas such as, among other things, distortion and noise.

What it lacks is a theoretical upper frequency limit due to the encoding. Digital overcomes the inherent physical limits of the medium and replaces these with an inherent high frequency limit due to the encoding.

In practice this allows digital to exceed the inherent limits of vinyl in every respect. In frequency response terms even CD vastly exceeds vinyl in the low end, and clearly exceeds it in the high end in practice. Though a vinyl record system can put out higher frequencies than a CD, this is always in practice about 100% noise. Below it's upper limit CD digital is flatter and cleaner in every way than vinyl recordings.

More importantly, CD is good enough to exceed the limits of human hearing, if only slightly. Once you have exceeded the limits of our ears then further improvement is theoretically pointless so far as playback is concerned.

This post has been edited by Ed Seedhouse: Dec 4 2012, 23:11


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mzil
post Dec 5 2012, 00:11
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QUOTE (Ed Seedhouse @ Dec 4 2012, 18:11) *
QUOTE (mzil @ Dec 4 2012, 10:10) *
Unlike CD, vinyl has no inherent high frequency limit, in theory.


This is wrong, i believe....

What it lacks is a theoretical upper frequency limit due to the encoding.

I have no idea where you got that I was talking about anything other than the encoding of vinyl, compared to that of the CD format, which I named, so I wasn't wrong.

This post has been edited by mzil: Dec 5 2012, 00:14
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Canar
post Dec 5 2012, 00:38
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QUOTE (mzil @ Dec 4 2012, 15:11) *
QUOTE (mzil @ Dec 4 2012, 10:10) *
Unlike CD, vinyl has no inherent high frequency limit, in theory.
I wasn't wrong.
This is wrong and you should feel wrong.

The big question is precisely how you define that "high frequency limit", as vinyl keeps getting worse the higher you go, unlike digital's perfect bandlimited reproduction.

This post has been edited by Canar: Dec 5 2012, 00:39


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