I hadn't heard of that one before.
According to Geddes, he can provide an example of 0.1% THD that nobody could hear and another example of 0.1% THD everybody could hear.
From looking the article here: https://link.springer.com/content/pdf/10.3758/BF03214307.pdf
it's not clear at all what kind of distortion perception they are testing for, or if it changes during the test. Like, is it the kind nobody can hear at 0.1% or the kind everybody can hear?
In addition, looks like it uses forced choice ABX which receives a lot of criticism by some people as unsuited to fine discrimination for some types of listening. I once proposed a double blind sorting test that I suspect would be more well suited to what is to be measured, but nobody seems to care. Hopefully, if Geddes or someone was ever funded to do serious research in this area, finding a double blind test that people on both sides of issue could agree was fair and accurate would be part of the undertaking.
If you mean me, both speakers were reversed. Just reversing one would have caused bass cancellation.
Back on snake oil I need a new mat for my turntable. The original felt mat has shrunk over the decades and its replacement annoys my by coming off each time I lift a record.
Roksan RMAT-7 High Performance Vinyl Record Support Mat
$Preferred_expletive me! what gobshite over a circle of felt with a few holes. Plan b into action methinks.
Roksan RMAT-7 High Performance Vinyl Record Support Mat
$Preferred_expletive me! what gobshite over a circle of felt with a few holes. Plan b into action methinks.
This one says it's for Audiophiles:
Amazon.com: Turntable Toys TC-8 Cork Audiophile Turntable Mat 1/8-Inch thick: Home Audio & Theater
Now guys, when you change your mat, you must rotate it relative to the turntable itself in order to get the best sound. Give it a try!
I prefer rubber mats.
Plenty available at vintage audio stores, or used on eBay. My next turntable will have an azimuth adjustment, for thick vinyl, or maybe thick mats. Then again, I'm cheap.
This one is not available in the UK.
Presumably due to the differing magnetic field in the UK?
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Latest contributions added.
Typical characteristics of snake oil products...
1) Huge price mark-up, like price 100x material cost
2) Hijacking of a topical scientific principle, but the claims contain scientific blunders and lack of understanding of those principles and science in general.
3) No credible, controlled trial to show efficacy.
4) One person company, absence of credentials or exaggerated/fake credentials.
5) Strip-down of product reveals ordinary components that have been obscured.
6) Glowing testimonials from ' professionals ' with prefixes such as Dr or Professor added to their names , upon closer inspection it turns out that the Dr is a hypnotist and the Professor a school janitor.
7) Advertising on and being revieved by 6moons. (and other sites)
8) "Quantum" or "Magic" in their product name
9) Claiming "years of research".
10) Claiming Military sales (eg: secrecy and gravitas)
11) Patented or proprietary (more secrecy)
12) "As seen on TV" or YouTube "proof" demonstrations
13) Used by NASA
14) Comes with supporting white papers, 'explaining' how it works
15) Claiming hundreds if not thousands of hours break-in for a passive product. Yet it claims an immediate effect on sound.
16) The change in sound you are supposed to experience with snake oil products are explained in the product
lecture..
17) The effect is best heard by trained listeners in systems with fine discrimination.
18) Claims that are non-falsifiable (you cannot design a test to disprove them)
19) Live demo with salesman who makes the product setup into a prolonged, involved ritual and tells you exactly what clear improvements a discerning audiophile will hear (I am sure Sir is discerning).
...
Typical characteristics of snake oil products...
1) Huge price mark-up, like price 100x material cost
2) Hijacking of a topical scientific principle, but the claims contain scientific blunders and lack of understanding of those principles and science in general.
3) No credible, controlled trial to show efficacy.
4) One person company, absence of credentials or exaggerated/fake credentials.
5) Strip-down of product reveals ordinary components that have been obscured.
6) Glowing testimonials from ' professionals ' with prefixes such as Dr or Professor added to their names , upon closer inspection it turns out that the Dr is a hypnotist and the Professor a school janitor.
7) Advertising on and being revieved by 6moons. (and other sites)
8) "Quantum" or "Magic" in their product name
9) Claiming "years of research".
10) Claiming Military sales (eg: secrecy and gravitas)
11) Patented or proprietary (more secrecy)
12) "As seen on TV" or YouTube "proof" demonstrations
13) Used by NASA
14) Comes with supporting white papers, 'explaining' how it works
15) Claiming hundreds if not thousands of hours break-in for a passive product. Yet it claims an immediate effect on sound.
16) The change in sound you are supposed to experience with snake oil products are explained in the product
lecture..
17) The effect is best heard by trained listeners in systems with fine discrimination.
18) Claims that are non-falsifiable (you cannot design a test to disprove them)
19) Live demo with salesman who makes the product setup into a prolonged, involved ritual and tells you exactly what clear improvements a discerning audiophile will hear (I am sure Sir is discerning).
...
Both my TT have azimuth but never heard of anyone changing that per record. VTA maybe..
My Konkrete Kenwood has a rubber platter, but the whole design of the Roksan is based on isolating the record from the turntable, hence felt and a removable spindle. I should get a vac hold down setup so I can go from the sublime to the ridiculous.
Quantum device of the day, see this reasonably priced mains filter...
Nordost Quantum Mains Purifier QX4 for PS1,799.95 in Hi-Fi at Audio Affair
Try this Bill.. only $350...
SPEC+ AP-UD1-SPEC-Point Audio & SPEC designer audio
Nordost Quantum Mains Purifier QX4 for PS1,799.95 in Hi-Fi at Audio Affair
Try this Bill.. only $350...
SPEC+ AP-UD1-SPEC-Point Audio & SPEC designer audio
Secrets of any kind cannot be patented; the essence of a patent is disclosure in exchange for exclusivity.
If it's a military secret, how is he able to sell it to the general public? How is he able to sell it worldwide? Wouldn't it fall under technology export restrictions? He can sell what his website says are 'highly classified' products to anyone who has a few hundred bucks to waste on smoke and mirrors?
It is amazing how ignorant you guys are about phono turntable interactions and problems, yet your continuous criticisms of others who actually offer solutions.
For example, Linn actually had a rubber mat available, but recommended the felt mat for best sound reproduction. Actually comparing the two is what I did for the Japanese press decades ago, and they were astounded at how the felt mat quieted the record from static, etc. Now the question is WHY? And would it work with other turntables? Now that is something to work out among you. Even the physicist who recently won the Nobel prize might be interested in this question. (hint)
For example, Linn actually had a rubber mat available, but recommended the felt mat for best sound reproduction. Actually comparing the two is what I did for the Japanese press decades ago, and they were astounded at how the felt mat quieted the record from static, etc. Now the question is WHY? And would it work with other turntables? Now that is something to work out among you. Even the physicist who recently won the Nobel prize might be interested in this question. (hint)
The Military does not take kindly to secrets being openly discussed.
You can always tell the ones who have not dealt with classified materiel.
They have not had the fear of God put into them knowing full well they
will go to prison if they disclose the information that they dealt with.
The ones who deal classified material keep very quiet about it.
However, material that was once classified may still be held confidential as the decades pass and most of you will never hear of it, unless it gets distributed by some source. I'm pretty sure that Bybee walks a fine line on this, but it has been multiple decades when he was active with the military.
For example, did you know that cryoing submarine hatches was a military secret? Yes during WW1. How about cryoing machine parts that formed artillery shells and bullets to extend their working life? Yes, during WW2.
Now, in recent decades, people are cryoing their race car engine parts. Many here would laugh at that wouldn't they?
For example, did you know that cryoing submarine hatches was a military secret? Yes during WW1. How about cryoing machine parts that formed artillery shells and bullets to extend their working life? Yes, during WW2.
Now, in recent decades, people are cryoing their race car engine parts. Many here would laugh at that wouldn't they?
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