this post was submitted on 16 Jun 2024
290 points (98.7% liked)

Asklemmy

43138 readers
1398 users here now

A loosely moderated place to ask open-ended questions

Search asklemmy 🔍

If your post meets the following criteria, it's welcome here!

  1. Open-ended question
  2. Not offensive: at this point, we do not have the bandwidth to moderate overtly political discussions. Assume best intent and be excellent to each other.
  3. Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below
  4. Not ad nauseam inducing: please make sure it is a question that would be new to most members
  5. An actual topic of discussion

Looking for support?

Looking for a community?

~Icon~ ~by~ ~@Double_[email protected]~

founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 154 points 2 months ago (27 children)

Essential oils. Homeopathy. Chiropractic. Reiki. Juice cleanses. Perineum sunning. Internet accelerator software. Iridology. Faith healing. Organic food. Oil pulling. Gold plated digital audio cables.

[–] [email protected] 38 points 2 months ago (2 children)

It’s worth noting that gold plated connectors are not snake oil. Gold is a good conductor and doesn’t form a nonconductive oxide layer. That means it’s going to be more durable and won’t corrode together or apart like those old ass sheet metal tube sockets that all need to be cleaned.

load more comments (1 replies)
[–] [email protected] 32 points 2 months ago (6 children)

Everything marketed audiophiles, not only gold plated cables, but also anything that uses vacuum tubes because "they sound better"

[–] [email protected] 62 points 2 months ago* (last edited 2 months ago) (1 children)

There’s a LOT of snake oil in the audio world. Especially home theater and home studio setups. I’m a professional audio technician, and some of the “audiophile” setups I have seen are just outright asinine.

Use balanced signal for runs over ~3 feet. Use the cheapest star-quad cable you can get, and the most basic $4 Neutrik connectors. Why? Because that album you’re using to test your “hi-fi” sound system was recorded using exactly that: Cheap ¢30/foot cable and basic Neutrik connectors.

It’s also what concert setups use. You think a concert with six combined miles of cabling is going to be paying $2000 per cable? Fuck no, they’re using the cheap shit (which was hand soldered in bulk at the warehouse workbench by their lowest paid shop tech), to run that million dollar audio system. Their money goes to the speakers, amps, and mixer; Not gold plated wire, robotic soldering, or triple insulated jackets. In double-blind tests, audiophiles can’t hear the difference between a $500 cable and a couple of plasti-dipped coat hangers twisted together.

The people who complain about digital audio also can’t tell the difference in double-blind tests. Because modern audio hardware is able to perfectly emulate old analog gear. Google the Nyquist–Shannon sampling theorem for a breakdown of how we can perfectly capture and recreate analog audio with digital equipment. Vacuum tubes were groundbreaking when they were first used. But they had a lot of issues, and have very little relevance in today’s systems. They’re prone to burning out, notoriously fragile, and can be emulated perfectly.

[–] [email protected] 12 points 2 months ago (1 children)

The Norquist-Shannon rate sampling theorem only asserts that for a given maximum frequency, you only need another other given maximum frequency of sampling to represent it.

It does not say you can “perfectly” reproduce a signal. Only that you can reproduce all fourier components of the signal that are below half your sampling rate in frequency. It perfectly does that, yes.

But the signals that only contain a finite number of frequencies all below a certain maximum frequency are abstractions used in signal theory classes for teaching that theorem, and in engineering to hit a “good enough” target, not a “perfect” target.

Any frequencies bouncing around the room at over 22 kHz are lost at least to something using the 44 kHz sampling format.

TL;DR: Norquist-Shannon lets you completely reproduce signals with finite information in them. But real life sound doesn’t have finite information in it.

[–] [email protected] 5 points 2 months ago (1 children)

It's Nyquist–Shannon. Norquist is taxes.

Also frequencies greater than half the sampling rate aren't lost they fold into lower frequencies unless filtered out.

But if you think it's easiser to capture those room acoustics with analog equipment the non linear amplification and distortion of any analog system is going to change the sound just add much if not more then a good digital system.

So yeah both lose or distort the signal but digital does it in avery predictable way that can be accounted for and it does have a frequency region that it captures precisely. Analog doesn't.

[–] [email protected] 5 points 2 months ago (1 children)

Nyquist, thank you.

aren't lost they fold into lower frequencies unless filtered out

If by “fold into” you mean they add noise to and hence distort the readings on the lower frequencies, that’s correct. But that just takes it further from a perfect reproduction.

[–] [email protected] 2 points 2 months ago (2 children)

Frequency folding is the term used in DSP no need for quotes. The Nyquist frequency is commonly referred to as the folding frequency.

And yes frequencies above the Nyquist folding frequency alias into lower frequencies. A simple low pass filter prevents this however.

Properly filtered digital sampling produced a more accurate reproduction of the frequency range with less distortion then an analog signal.

[–] [email protected] 1 points 2 months ago

I don’t disagree that there’s noise in analog signals too, limiting their information capacity. But that’s coming from the limitations of our physical implementations’ quality, no?

load more comments (1 replies)
[–] [email protected] 27 points 2 months ago (3 children)

I was buying a toslink cable recently and I shit you not, there was a gold plated optical cable...

[–] [email protected] 12 points 2 months ago* (last edited 2 months ago)

Fucking Toslink: one round optical fiber in the middle, but it plugs in in only one position out of four, and you can't feel which way the female connector is. EU should fine the assholes responsible.

[–] [email protected] 4 points 2 months ago (1 children)

Doesn‘t that defeat the entire purpose of Toslink cables ? The light can‘t go through gold?

[–] [email protected] 6 points 2 months ago

The connector was gold plated. Not a golden wire.

[–] [email protected] 3 points 2 months ago

I 100% believe you.

[–] [email protected] 9 points 2 months ago (1 children)

I agree, but with one caveat.

Fully analog tube amps do definitely produce a warmer/richer sound with less complicated things to go wrong. Artists like them because they are reliable, generally user serviceable, (usually just need to replace bad/old tubes) and makes each recording sound relatively unique.

The thing is, is that it really only works during production. Unless being cut direct to a master record, the sound will get saved in a digital format to produce the user-facing media, which can include digital-source vinyls.

Those products marketed to audiophiles try to take the digitally recorded/archived products to "try" making it sound like the original.

load more comments (1 replies)
[–] [email protected] 7 points 2 months ago

I remember buying some bits and pieces to setup my home theatre in a new house years ago, and the guy at the store tried to sell me a $100 TOSLINK cable. When I asked why a $12 cable was going for so much, he pointed out that it was the "premium" cable, to ensure the highest quality audio.

I couldn't stop laughing. Like their special cable scrubbed the photons before sending them or something.

[–] [email protected] 1 points 2 months ago

The Guys podcast has a pretty fun episode about this.

load more comments (1 replies)
[–] [email protected] 14 points 2 months ago* (last edited 2 months ago) (1 children)

Perineum sunning


I'm sorry WHAT

[–] [email protected] 4 points 2 months ago* (last edited 2 months ago) (1 children)

I've not heard of this but I assume it's irradiating your taint/barse/grundle with sunlight. Although for what purpose is beyond me.

Edit: Wikipedia link

[–] [email protected] 3 points 2 months ago (1 children)

Isn't showing the sun your grundle purpose enough?

[–] [email protected] 2 points 2 months ago
[–] [email protected] 7 points 2 months ago (1 children)

Oil pulling, if you're also OOTL. Swishing fancy oil around your mouth.

[–] [email protected] 9 points 2 months ago (2 children)

One of my co-workers went for that whole hog. I remember him telling me there was no need to brush any more - just swirl oil around your mouth for ten minutes. I don't know if it works, but brushing only takes two minutes...

[–] [email protected] 11 points 2 months ago

Well, there’s nothing wrong with using coconut oil for gum health. Some people even use it as a mouthwash because it was some antibacterial properties. It doesn’t replace the need for brushing your goddamn teeth, that’s an insane thing to think. But there is actually benefits to coconut oil for sensitive teeth (along with a change in diet), antibacterial properties, as well as the normal benefits of consuming coconut oil. It’s not all complete hogwash.

[–] [email protected] 3 points 2 months ago

Oof ouch my enamel.

[–] [email protected] 4 points 2 months ago (1 children)

How do you bundle up organic food with the rest of that ?

[–] [email protected] 4 points 2 months ago (1 children)

At best, organic food offers the same nutritional value as non organic food. At worst, it’s less nutritious and more expensive.

[–] [email protected] 14 points 2 months ago (2 children)

meh. nutritional value is about the same, yeah, but that's not the point of organic food. people who claim that eating an all organic diet makes you better are yahoos.

The point of organic farming is that it is just all-around better for the planet, the soil, the organisms therein and less polluting.

[–] [email protected] 6 points 2 months ago (1 children)

The only real issue I see with organic food is that it excludes GMOs

[–] [email protected] 4 points 2 months ago

GMOs are an issue for nations' food sovereignty, but organic food modt importantly means no phytosanitary products (such as the infamous roundup), which persist in the plants and cause all sorts of cancers

[–] [email protected] 1 points 2 months ago (1 children)

There is not conclusive evidence that organic food is better for the environment. Obviously there are facets of the environment impact that will be better than conventional agriculture, but there is a ~19% reduction in yield, and lower soil carbon in organic agriculture. A reduction in yield means more land must be cleared for agriculture, so the other facets of organic ag would need a to be substantially better than conventional to make up for it.

[–] [email protected] 2 points 2 months ago (1 children)

I disagree. Just following your source to its conclusion, I think it's safe to say OA (organic agriculture) is better all around:

7.1 Pros • Lower emissions of CO 2 , N 2 O, and CH4 • Enhanced soil and water quality • Lower energy use per land area • Higher energy efficiency per land area 7.2 Cons • Lower soil profile SOC stocks [i.e. how much carbon is in the soil] • Lower crop yields • Higher land requirement • Lower energy production per land area

Your conclusion that we'd have to clear more land for agriculture use if we all switched to OA seems flawed; e.g. here in Germany we use about 60% of agricultural land to raise livestock feed like corn etc (https://www.landwirtschaft.de/tier-und-pflanze/pflanze/was-waechst-auf-deutschlands-feldern). Seems to me like eating less meat and growing idk lentils or beans would not immediately lead to food insecurity.

This is also what the FAO says: yes, OA leads to yield reduction when compared to conventional methods, but not to food scarcity and instead to healthier ecosystems (https://www.fao.org/organicag/oa-faq/oa-faq6/en/).

(sry gotta go, more.later)

load more comments (1 replies)
[–] [email protected] 3 points 2 months ago (2 children)

Organic food is devinetively not snake oil. As you mentioned,Nutrition wise its exactly the same. However, the Environmental Impact is completely different. Organic farming is much better in terms of biodiversity, soil health. Since organic farming doesn't include the use of pesticides it doesn't kills everything else that would live on a field. Also, Theres always parts of the pesticides that stay in the crops and that you eat. I don't know exactly how bad they are, but considering that(at least in Germany) Parkinson is an accepted work related illness for farmers its sure that they aren't entirely safe for humans. However, we should take into consideration, that farmers get exposed to much higher doses of pesticides. If someone has some articles regarding this topic feel free to share.

load more comments (2 replies)
load more comments (21 replies)