NorthSky
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Analog Frequency Response
- Thread starter NorthSky
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restorer-john
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So, what is the point of this youtube video and why have you posted it- commentary?
Surely ASR is better than posting links to random Youtube videos?
Surely ASR is better than posting links to random Youtube videos?
It seems to be a form of forum democracy even if not specific or supported, re thread topic. Becoming more frequent. Thus it is.
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Bob what are you getting at here? Care to explain?
lolIt seems to be a form of forum democracy even if not specific or supported, re thread topic. Becoming more frequent. Thus it is.
The Smokester
Active Member
I'm unimpressed with the turntable. It would be nice to see a Fourier transform and try to assess how much of this was mechanical resonances.
OP
NorthSky
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If some of you are unhappy, go post in the Fight Club section...it's the place.
If I have to explain myself each time I post something just to please some of you, life would be miserable. So take your misery with you and go bully someone else.
You don't like it, it's your problem, don't blame me, grow up.
If I have to explain myself each time I post something just to please some of you, life would be miserable. So take your misery with you and go bully someone else.
You don't like it, it's your problem, don't blame me, grow up.
The Smokester
Active Member
You might have had some insight in mind when you posted it. Care to share?
OP
NorthSky
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The video is self-explicative; what else do you want me to say.
The guy might not use the best turntable and the best CD player but that won't make any difference from the measurements showing on the screen's graphs.
It doesn't matter what I think and what I like, I look @ the results he demonstrated. I don't need to be attacked and questioned on a video someone else made with factual measurements. I simply shared that video to the science members here. Is that wrong, certainly not, so move on and discuss the post, the measurements, the audio science, and not the poster. Not you, those two others.
Cheers, great day today outside, just gorgeous. ...With five dogs and three cats, ocean front view with arbutus and oak trees, bald eagles and whales under water. People are smiling and looking fantastic, happy, life is excellent.
The guy might not use the best turntable and the best CD player but that won't make any difference from the measurements showing on the screen's graphs.
It doesn't matter what I think and what I like, I look @ the results he demonstrated. I don't need to be attacked and questioned on a video someone else made with factual measurements. I simply shared that video to the science members here. Is that wrong, certainly not, so move on and discuss the post, the measurements, the audio science, and not the poster. Not you, those two others.
Cheers, great day today outside, just gorgeous. ...With five dogs and three cats, ocean front view with arbutus and oak trees, bald eagles and whales under water. People are smiling and looking fantastic, happy, life is excellent.
Some members just wanted a bit of background on the reasoning being this clip you posted. There’s no need for this kind of reaction bob.
It’s not at all fair or reasonable.
What did I get out of the video?
Showing the frequency difference using a Linear Scale is much more impressive visually than using a Log Scale.
Oh wow.
It really spreads out the "you can't hear it anyway" higher frequencies on the graph.
Linear vs Logarithmic Scale for frequencies of the same little slice of CD music, and the "missing" part (up to 48kHz). Would be twice as impressive stretching it out to 100k.
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The piano keyboard would be impractical if the width of the keys were related to the fundamental frequencies they play in a linear fashion.
Lowest note key width = 1 inch, and a linear width scale used, the highest note key would be 152 inches wide.
And that only covers the range of 27.5 to 4186Hz.
There must be a good reason the piano layout is closer to logarithmic (or is it just exponential?) at least, by octaves.
Showing the frequency difference using a Linear Scale is much more impressive visually than using a Log Scale.
Oh wow.
It really spreads out the "you can't hear it anyway" higher frequencies on the graph.
Linear vs Logarithmic Scale for frequencies of the same little slice of CD music, and the "missing" part (up to 48kHz). Would be twice as impressive stretching it out to 100k.
---
The piano keyboard would be impractical if the width of the keys were related to the fundamental frequencies they play in a linear fashion.
Lowest note key width = 1 inch, and a linear width scale used, the highest note key would be 152 inches wide.
And that only covers the range of 27.5 to 4186Hz.
There must be a good reason the piano layout is closer to logarithmic (or is it just exponential?) at least, by octaves.
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Not only piano, it is part of human history.
https://en.wikipedia.org/wiki/Equal_temperament
Also it would be strange if someone can hear 20kHz cutoff but cannot hear vinyl induced distortion below 20kHz, which the video didn't show.
http://archimago.blogspot.hk/2017/06/musings-measurement-thoughts-on-vinyl.html
I myself can never hear 20kHz cutoff, even in my teens.
Intriguingly ill conceived. Just shows how much technically questionable garbage is freely available on the internet, sadly.
It is very, very unlikely that the record player in the video could pick up any higher frequencies accurately, even if they were on the LP. It doesn't look like a particularly sophisticated cartridge, so it probably has a spherical stylus, or maybe at best an elliptical, this exacerbates the distortion at higher frequencies. It is common for even very good cartridges to have high distortion at high frequencies, the very expensive Lyra Etna SL has around 10% distortion at 10kHz - and what he is using ain't near as good as one of those, so it is very, very likely that most of the higher frequency stuff on his graphic is distortion products of the cartridge he is using.
Luckily it is inaudible and not reproduced by most speakers anyway.
It is very, very unlikely that the record player in the video could pick up any higher frequencies accurately, even if they were on the LP. It doesn't look like a particularly sophisticated cartridge, so it probably has a spherical stylus, or maybe at best an elliptical, this exacerbates the distortion at higher frequencies. It is common for even very good cartridges to have high distortion at high frequencies, the very expensive Lyra Etna SL has around 10% distortion at 10kHz - and what he is using ain't near as good as one of those, so it is very, very likely that most of the higher frequency stuff on his graphic is distortion products of the cartridge he is using.
Luckily it is inaudible and not reproduced by most speakers anyway.
svart-hvitt
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Agree. This video underlines the importance of an intelligent, robust method plus input (for example test signals) of high quality. If you want to document something, «find the truth», there is most of the time no such thing as a perfect test setup. However, this test (video) has some rather obvious flaws.
You so rarely see distortion numbers for carts, probably they look so bad, like speakers.
If I had ultrasonic hearing I'd be interested in this, http://www.dynavector.com/products/cart/e_17d3.html, I would hope very extended freq response means low distortion in the audible band, no idea if it does.
HiFi News does a distortion measurement of all the cartridges it tests. It is the only magazine I know of in English that does. Typically 2% through the mid band and often 8% in the top octave (10kHz-20kHz) though there are substantial variations. The biggest difference between cartridges is frequency response. Very few are flat, some have big peaks in the treble but many of the popular audiophile units are rolled off in the treble, some, like Koetsus start to roll off surprisingly early. Can't find the plot at the moment though
One thing to mention- distortion is significantly different for horizontal (mono) modulation and vertical (stereo difference) modulation, the latter being much worse. Does HFN measure those separately?
Yes.
It isn't always massively differnt though, depending on design and setup. Very few cartidges, if any, have anywhere near linear magnetic circuits according to a specialist I know. Certainly the traditional MC layout isn't linear so there is a lot of polishing the turd goes on, to use the old term of phrase.
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