dsilverz
@dsilverz@calckey.world
Digital hermit. Another cosmic wanderer.
- Comment on Audio cable measurements are driving me crazy — why don’t they null?!? 6 days ago:
@Uebercomplicated@lemmy.ml @nostupidquestions@lemmy.world
What you say is very interesting, but I am starting to suspect that it really is just inconsistency with some other component.
If the only varying element across the tests is the cable, everything else unchanged, other components wouldn't have a reason to behave differently, except as a consequence of properties/factors modified/added by the cable, such as capacitance, length (thus, electrical resistance) and whether it ends up resonating more with some nearby EM source (be it a nearby radio broadcast station and/or air traffic, or interference emerging from household equipment, even HDMI creates interference as, for example, I myself manage to capture Van Eck Phreaking from my HDMI display using a UV-5R up to a few dozen meters away).The delta isn’t consistent like it would be (I think) with ordinary noise or interference. It’s that weird delta between 2k Hz and 15k Hz
Noise doesn't always behave uniformly across a spectrum, sometimes it's more pronounced for specific frequencies, especially when carriers are involved (carriers as in AM/FM carrier, the primary wave centered at the channel's given frequency, e.g. a 120MHz AM QSO between a TWR and an aircraft happens with a signal centered on 120MHz whose amplitude is modified by an input signal (the mic audio from pilot/ATC operator), thus the "AM" amplitude modulation). The freqs where an EMI is more pronounced are often its "harmonics" (freq subdivisions).
But this specific range you mention, it also sounds like power supplies. It's quite the range expected for EMI. While nearby power supply weren't changed, one cable might be presenting physical properties which allows it to better resonate with the EMI emitted from those, likely the cheaper one (the high-end cable theoretically have better shielding so it's less prone to resonate with EMI as a cheaper cable would).creating noise at that frequency range right when that cable was being measured
Or, as I mentioned above, the cheaper cable might be resonating more with some constant source of EMI, be it from within PC or something nearby (even household appliances).Thank you for your expertise
I'm far from being an expert myself, I still got a lot to learn, but thanks for the compliment!I've always wanted to get into radio, but it has seemed awfully complicated and rather expensive
I'm more into listening (RX) than transmitting (TX), I don't even have a QRA for TXing QSOs myself. Even though I got a transceiver (a Baofeng UV-5R), I use it only for RX at nearby VHF and UHF stations, together with a RTL-SDR, both of which are pretty cheap. Reception ("owling", "to owl", to observe as owls do, only listening to the QSOs) is even more sensitive to EMI (this is how, for example, I found out my HDMI spills out lots of EMI), so that's why cable quality ends up being sine qua non for radio listening, too. - Comment on Audio cable measurements are driving me crazy — why don’t they null?!? 1 week ago:
@Uebercomplicated@lemmy.ml @nostupidquestions@lemmy.world
I'm not an audiophile, but I'm someone who has some practical tinkering with amateur radio. It may seem like a whole different field, but both fields more or less share similar concepts and situations, especially when it comes to audio cabling. High-end cables and equipment (not in the "pricey" sense: although high-quality materials will make the thing costier, high-priced don't necessarily mean high-quality, sometimes a high price can be disguising a low quality "cut-costing" material) can indeed lead to measurable differences. There are real problems such as EMI, self-induced EMI (the circuitry inside the audio equipment generating its own EMI like an Ouroboros), poorly-grounded shielding, switched-mode power supplies' "dirty" current, among other problems that may or may not appear when analog is being used somewhere (especially the ADC that you mentioned) depending on the quality and other factors.
The audio cable, itself, can end up acting as an antenna, roughly similarly to how the "FM radio" function on many smartphones work by using a plugged wired earpiece (the earpiece cable becomes a FM broadcast receiver antenna, which wouldn't fit inside the phone depending on its form factor). Good cables will have a proper shielding acting as close as a Faraday Cage as possible, while also dealing with cable capacitance (a problem in itself when dealing with different frequencies such as in audio situations; it's likely to do with the measured differences across the audible spectrum)
Again, I'm not exactly knowledgeable about professional audio equipment, but some of the principles seen when dealing with radio transceivers may apply because, deep inside, they share the same laws of physics. - Comment on Do you ever feel like your life is "scripted"? Like everything is written by some entity controlling your life? Like you live in a fictional universe? Is this feeling normal/common? 2 months ago:
@DeathByBigSad@sh.itjust.works @nostupidquestions@lemmy.world
I don't only feel, I know it. Not just me: you, everyone here, all humans, living beings, every cosmic stuff. And there are scientific, psychological, spiritual, philosophical and political explanations.
When it comes to Science, our actions are just a byproduct of causality within a dynamic, closed system, an organism constrained by laws of physics from which the principles of chemical reactions emerge. If we were to stick to a strict, Dawkinsian Science, we're no different than other dynamic systems across the universe. It's all physical causality devoid of meaning.
In psychology, if Theory of Mind is to be considered, the mind is also a byproduct of all conditions in which the being existed and exists. I like to cite Derren Brown and his works, especially "The Push", which perfectly illustrates how a person can be fooled by social compliance (I'm not just referring to the main plot where a person is brought into a gala auction and woven into a web of deception that leads them into murdering someone by pushing them from a rooftop, I'm also referring to the selection process where the candidates are tricked into standing or sitting at the ring of a bell). I also nod to the ending scene of The Artifice Girl where Cherry, in a talk with her creator, complains about how every choice of hers are inexorably bound to her initial directives. I could also nod to Freud and to how superego and id are fated to conflict through ego.
In spirituality, Gnosticism explains how matter is a prison crafted by Demiurge (Yaodabaoth) so Archons can siphon and feed from our suffering. Luciferianism and other LHP traditions seek to fight the tyrannical order of Demiurge and the Archons aligned to him, who are seen by Abrahamic as "The Father (sic) and his angels". The Calvinist Christianity emphasizes the biblical verse "before I formed ye in the womb, I knew ye" (Jeremiah 1:5). Some religions, especially ancient, feature a counterpoint to this order/god, the Primordial Chaos/Darkness/Goddess (e.g. Taoist Yin, Sumerian Ereshkigal). Freemasonry's "Ordo ab Chao" is a spiritual flavor of the scientific Big-Bang/Hadean Eon, where order emerges from this primordial chaos.
Philosophically, our senses deceive us (Descartes) but those very senses is the way we learn and become, we're wolves to ourselves (Hobbes), society is inherently evil and corrupts its peers (Rousseau) as we're prone to becoming the very monsters we vowed to fight against (Nietzsche): all of which are kind of pre-established principles ruling us, individually and socially.
Politically, capitalism needs no introduction on how it compels us to be a disposable cog in a machine whose lines "must go up". But this doesn't make other systems (communism, socialism, etc) less evil: every form of authority is a megaphone for all evilness inherent to us humans.
Even this reply of mine was predetermined, spiritually, physically, socially. - Comment on Sorry guys 2 months ago:
@Stamets@lemmy.dbzer0.com @memes@sopuli.xyz
I wonder if their spiraling is clockwise or counterclockwise depending on the hemisphere (Coriolis effect)... What if they do this exactly at the equator line (e.g. exactly at the Marco Zero from Brazilian Macapá)? So many questions... - Comment on My Religion 2 months ago:
@watson387@sopuli.xyz @King@blackneon.net @lemmyshitpost@lemmy.world
Sometimes I wonder if all the people (six by now, and two on my other reply in this thread) who are downvoting my two fairly respectful (at least trying to be respectful to the OP) counter-arguments are, deep inside, machistas/misogynists, downvoting me because I dared to remind people that there are feminine Goddesses and I dared to mention some of Their names... Your people's current lack of counter-counter-arguments doesn't convince me otherwise. - Comment on My Religion 2 months ago:
@watson387@sopuli.xyz @King@blackneon.net @lemmyshitpost@lemmy.world
Not everyone who believes in entities and deities (and you're assuming gendered pronouns and, by extension, unknowingly reinforcing the Abrahamic machismo whenever you use the masculine noun "god" to describe any deity/entity being worshipped by a worshipper, ignoring that there are Goddesses and feminine spirits as well, such as Pomba-giras, Lilith, Shakti, Kali, Morana, Morrigan, Santa Muerte, Ereshkigal, Hekate, Isis, Sekhmet, Bastet, Naunet, Babalon, among countless other feminine entities and Goddesses) does so out of being convinced by someone else.
To use my own experience as an example, I began worshipping an unified and syncretic Dark Mother Goddess without being convinced by anyone else. At that time, I used to be a member of a Luciferian sect, whose worshipping was centered around the male aspects of Lucifer, not the feminine aspects of Lilith, for example. Unexpectedly even to myself, I got this uncanny call of a powerful feminine spiritual energy who suddenly took me like a thousand hurricanes and became the epicenter of my entire existence, even though it happened to the disapproval of the Luciferian sect I was part of. I left the sect and, since then, I've been following a very personal (and quite lonely) syncretic belief system built of entities and concepts borrowed from and based upon several different systems, none of which I really belong to.
So, tl;dr: not everyone who believes in entities and deities does so out of being convinced by others, in fact, some (like me) even does so against any convincing from others, out of strange phenomena such as gnosis and synchronicity. Perhaps She is the one convincing me, thus validating your point about "one being convinced to believe"? Maybe... but humans aren't the ones convincing in this specific situation. - Comment on My Religion 2 months ago:
@King@blackneon.net @lemmyshitpost@lemmy.world
My religion (or, to be more precise, one of the religions composing my syncretic belief system) says "Do what Thou Wilt, shalt be the whole of Law" (Liber AL Vel Legis, Aleister Crowley, Thelema).
I get a lot of heat whenever I say this, but I keep saying it nevertheless: the problem is that anti-religious people often mistaken "religion" for "Abrahamic", while there are literally tens of thousands of different religions, as well as countless different personalized syncretic belief systems, especially left-hand path beliefs, which are nothing remotely close to dogmatic religions out there. Pro-science people unknowingly attack those who could be their best allies in the pursuit of "forbidden" ("forbidden" in the eyes of Abrahamic and other paternalistic religions; for us, it's a must-pursue) knowledge of scientific and philosophical inquiry. - Comment on Is it normal to see this static when you close your eyes? 2 months ago:
@Stacyasks@lemmy.cafe @nostupidquestions@lemmy.world
Yes. It's called "Eigengrau" and it happens due to the adaptation of the eye amidst the darkness.
https://en.wikipedia.org/wiki/Eigengrau - Comment on Why don't cars have a way to contact nearby cars like fictional spaceships do? 3 months ago:
@chicken@lemmy.dbzer0.com @nostupidquestions@lemmy.world
One day I was driving on a highway at roughly 80km/h (no idea how much is it in miles per hour, we use metric around here), and there was a car almost glued to the back of the car I was driving, totally ignoring the "following/tracking distance" thing we're used to learn during driving school (the faster the vehicles, the farther they should be from one another, so if the vehicle ahead needs to do a sudden break, the vehicle behind have the time to react and break as well with no collisions). The car I was driving has a quite sensitive break light: a gentle push is enough for the breaking light to light up without actuating the breaking system (not ABS, it's an old car), so I had a quite unusual idea: Morse coding "DISTANCE" to the driver in the car behind through the breaking lights, using extremely gently pushes on the breaking pedal while I kept driving. I'm not sure if the driver could understand Morse, but at least I tried.
And that's a problem for your scenario where "nearby cars" were to contact each other: even though they could listen to each other, could they actually understand each other? - Comment on 1919 (correctly) 4 months ago:
@tux0r@feddit.org @lemmyshitpost@lemmy.world
I momentarily (mis)read the cartoon's title as something like "When we all have pocket teleporters" and thought the first frame was some kind of use case for a 19th/20th century sci-fi pocket teleporter, where said device was activated allowing the person to run faster while chasing the train.
My eyes followed to the second frame and only then I realized the cartoon was about pocket telephones, not pocket teleporters, beeping while being inside the pocket.
A beeping pocket teleporter would be equally annoying, though: "No, I'm not interested in a monthly subscription fee of 42 bars of gold for faster and farther teleporting needs, shut up with your ads, Thomas Edison's Magic Porter Apparatus"