Well sound is just wiggly air. You put the air wiggle onto the disk so later you can use the disk wiggle to make air wiggle.
Feeling that groove
Submitted 16 hours ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/3b2eea78-8262-4e29-b785-c6c5577b06e3.jpeg
Comments
nialv7@lemmy.world 3 hours ago
Denjin@feddit.uk 16 hours ago
It’s actually quite straight forward. Inside the record player there’s a small group of highly trained goblins. They watch the needle move side to side and they perfectly recreate the music using their tiny instruments.
Simple.
I_Fart_Glitter@lemmy.world 14 hours ago
Ah, very similar to the camera (iconograph) filled with fast painting imps.
Denjin@feddit.uk 14 hours ago
That may or may not have been my inspiration
fartographer@lemmy.world 9 hours ago
I got the knockoff version that had an understaffed team of mostly complacent fairies using thrift shop keyboards. I tried playing Hocus Pocus by Focus and they burned down my house and flew off with my neighbor’s cat.
then_three_more@lemmy.world 14 hours ago
GNU Sir Terry
SanctimoniousApe@lemmings.world 15 hours ago
I heard their team-building theme song was Madonna’s Into the Groove.
ChicoSuave@lemmy.world 15 hours ago
It’s so simple
Agent641@lemmy.world 1 hour ago
A cello is just a bit of wood with some stringy Bois, but it sounds like heaven and hell and everything in-between when played right.
Psythik@lemmy.world 10 hours ago
Simple. Sounds are vibrations. The grooves make the needle vibrate. Those vibrations are amplified.
Rekorse@sh.itjust.works 9 hours ago
How does it seem like multiple sounds come through at the same time though? Say drums and vocals and a guitar, all at once. How does one groove equate to all of that?
psycotica0@lemmy.ca 9 hours ago
Highly basic answer, let’s say the strength of the vocals wave over time is:
5, 4, 3, 2, 3, 4, 5, 4
And drums is:
4, 0, 2, 0, 4, 0, 2, 3
Then you add them together for each time slice and get:
9, 4, 5, 2, 7, 4, 7, 7
And you put that on a record, or out to a speaker, and our ears are able to break that up into the two parts when it hears it. This is the same as when two things are in the room making sound, there may be two sources, but my ear only has one hole, and that hole has one eardrum behind it. The different sounds just add their powers together and hit my ear as one mixed wave.
Alternative answer: magic
SirHery@lemmy.world 5 hours ago
Well if you put multiple waveforms above eachother the form on single waveform.(They all occupie the same space,in this case air, so they can’t be “separate”). This waveform is then recorded and remastered and whatnot. But basically the waves you can see on the vinyl are the “schape” they will have in the air.
olafurp@lemmy.world 8 hours ago
That’s the neat part, the brain does that using some black magic. You just have to add all the sounds individual waves together and the brain deciphers it.
Jerkface@lemmy.world 9 hours ago
You can add the waveforms together mathematically. Like if you go into a graphing calculator and plot a sine at 220 hz that’s an A note. Then add two more at 261(ish) and 329, baby you got yourself an A minor cookin’. That’s also what the groove would look like.
ramenshaman@lemmy.world 9 hours ago
That part still kinda mystifies me. I understand that it’s a single waveform and you can just add together all the different waveforms of each instrument but it still blows my mind. Kinda like I sort of understand magnets but it still seems like magic.
With vinyl records it’s pretty cool how it can do right and left channels. The right channel vibrates diagonally in one direction and the left channel vibrates diagonally in the other direction.
Blackmist@feddit.uk 4 hours ago
Certainly makes a lot more sense than a CD
docoptix@lemmy.world 3 hours ago
and CDs are still extremely simple compared to a compression format like MP3
realitista@lemmus.org 10 hours ago
Yeah it literally just the waveform in physical form. I couldn’t think of a better way to visualize it.
Zwiebel@feddit.org 15 hours ago
It’s not that hard to grasp I don’t think. If you understand graphs of soundwaves, 1000119500
skulblaka@sh.itjust.works 14 hours ago
What I don’t get, personally, is how this one scratched-in groove wave can contain a bassline, a melody and a singing voice and they all can be differentiated coming out of the speaker.
How speakers work in general is just black magic to me, actually.
xthexder@l.sw0.com 14 hours ago
So there’s this thing called a Fourier series…
Basically any wave can be created by adding together individual frequencies, and with some fancy math it’s possible to go the other way with a Fourier transform and get how loud every frequency is (like is displayed in a spectrogram).
I think the real black magic is in how our ears and brains can decode the mess of information coming in and identify meaningful patterns.
Natanael@infosec.pub 14 hours ago
That’s because it doesn’t, your brain does
Speakers do the simplest thing possible and literally just vibrate. A recording being played literally just recreates a recorded vibration. It’s a tiny choreography that your ears are incredibly sensitive for.
All the fancy stuff happens in our brains, after our ears has split up the sound around us into different ranges of frequencies (you can think of the hairs in the inner ears as tuning forks). We learn to recognize which frequencies goes together, and then we learn how the frequencies from multiple sources can overlap, and we learn what it all means
The real crazy part is how something as simple as sound can carry so much information and how reliably our brains can tell it all apart and make sense of it
nocturne@slrpnk.net 14 hours ago
Cethin@lemmy.zip 7 hours ago
An easier way to understand it, without knowing the math, is to know how it’s made. You play audio into a very similar device and it’s needle scratches the grooves. When you then have a needle pick up the grooves it’s moving the exact same way the needle was forced to move by the original.
It’s similar to how a speaker and a microphone are basically the same device. If you take a speaker and plug it into a microphone input, it still works (though they’re tuned differently so it’s not as good). A microphone has a crystal vibrate, which creates an electric signal. If you play that electric signal into a crystal it vibrates and creates the same sound.
There’s no math or anything being done for this to work. It’s purely mechanical. It’s just a copy of what the needle did when sound was played into it, so another needle running through it recreates the same sound. You can use math to represent it, but none is being done by the device (other than just the laws of physics).
Bubs@lemmy.zip 12 hours ago
This is from a video about headphones. His layman’s explanation at the timestamp is probably the best I’ve heard it told:
unexposedhazard@discuss.tchncs.de 15 hours ago
Even simpler to visualize: Its the movement of the membrane of the speaker turned into a physical line.
Eq0@literature.cafe 15 hours ago
That explains just a tiny part. There are so many different sounds at the same volume and frequency
gnu@lemmy.zip 15 hours ago
All the sounds get mixed together as they approach you (as they compress the same air), by the time it gets to your ear it can be represented by one complex wave.
qjkxbmwvz@startrek.website 15 hours ago
If you can build up intuition around Fourier decomposition I think it gets much easier to understand.
Multiple things going on at the same frequency are indistinguishable (up to a phase). Lots of stuff going on at different frequency can be separated. Light also has frequency (color) and volume (intensity)—it may be more intuitive to conceptualize in this way.
TowardsTheFuture@lemmy.zip 15 hours ago
Yeah, waves add. Which, well they add from the center which looks weird and bumpy. What’s more amazing is how good our ears are at picking out differences (it’s like 100x more sensitive to differences than other senses) so it can tell what all those individual waves would be so we can still hear the guitar vs drums vs bass vs vocals when it’s all one wave combined.
Oisteink@lemmy.world 15 hours ago
It’s not that hard to grasp if you read up a bit. You are probably born early 1900’s and have never heard of stereophonic recordings. But fear not!! What you are seeing is left + right channel (mono). The left - right channel is encoded vertically. So your left channel is mono + vertical divided by 2, and the right is (mono - vertical) divided by 2.
aeternum@lemmy.blahaj.zone 6 hours ago
Anything sufficiently advanced is indistinguishable from magic.
I’m convinced this is magic.
RizzRustbolt@lemmy.world 5 hours ago
It’s only weird once electrons get involved.
TankovayaDiviziya@lemmy.world 6 hours ago
Add quantum science to the list.
aeternum@lemmy.blahaj.zone 6 hours ago
I’ve watched some yt videos about quantum mechanics. I am FAR too dumb to understand even a few words of what they were talking about lol
JimVanDeventer@lemmy.world 6 hours ago
Sound is vibration. A record is a vibration frozen in place.
Tylerdurdon@lemmy.world 11 hours ago
How about this one to blow your mind further:
Because of how it was made, they could play back the sounds around the potter who fabricated it.
I thought they had done the same with some Roman parchment, but all I can find are links to stories on that one.
Valmond@lemmy.world 4 hours ago
That’s a lot of screaming!
Actually this is one of the coolest things I have ever seen or heard, thank you!
stardom8048@lemmy.world 5 hours ago
Interesting, but I think this is largely discredited from the brief research I did?
en.wikipedia.org/wiki/Archaeoacoustics#Discredite…
Cool idea nonetheless.
fistac0rpse@fedia.io 2 hours ago
Doesn't really discredit it based on that, but thanks for the article
ramenshaman@lemmy.world 9 hours ago
Holy crap that’s wild
realitista@lemmus.org 10 hours ago
What the hell are the sounds supposed to be?
FuglyDuck@lemmy.world 10 hours ago
Someone playing a recorder or flute like instrument?
Or some one was being tortured.
tamal3@lemmy.world 9 hours ago
The description says it’s a violin
Rhaedas@fedia.io 15 hours ago
The video explains how a single needle can play stereo sound, but in doing so explains how the basic idea works before going into the incredible design to do two channels.
Gullible@sh.itjust.works 15 hours ago
Link is borked because of the ! at the beginning. It’s trying to pull a picture that doesn’t exist
mp3@lemmy.ca 14 hours ago
As a general FYI, you can make a clickable YouTube thumbail like this
[](https://www.youtube.com/watch?v=3DdUvoc7tJ4)Just replace the videoID in the thumbnail and URL.
SreudianFlip@sh.itjust.works 10 hours ago
Consider this: every record I play has a faint recording of the room, every time it has been played, since no turntable or cartridge is perfectly isolated, and, being diamond rubbing against vinyl, will leave some trace of the room sound behind.
ChaoticNeutralCzech@feddit.org 13 hours ago
Records are very easy to understand. Even without a microscope, you can see periodic patterns on test vinyls with beeps.
You can even see tracks starting and ending on pressed CDs under the right lighting with your own eyes. I wonder, is the encoding of silence (approx. 2 seconds) really that different or does the density of grooves or pit/land pattern specifically differ to help the player seek there faster? I know that uncompressed audio naturally results in a repeated pattern when silence is encoded but given the 8-to-14 modulation and other error correctiion techniques, I find it hard to believe it would result in significantly different density unless they specifically added a special mode just for encoding silence that makes the track brighter-colored for easier coarse seeking.
Madison420@lemmy.world 12 hours ago
Theres a graphic somewhere I’ll try to find that shows a bird call as a sound wave then a picture of record topography of the same call that makes it fairly obvious.
Gramophones are also fairly illustrative given that the needle directly acts on a diaphragm that is directly connected to a bell shaped horn.
ABetterTomorrow@sh.itjust.works 10 hours ago
Would love to see that
CookieOfFortune@lemmy.world 13 hours ago
Long runs of no changes is generally undesirable because it makes it harder to know where the reader is. So you’d want some type of coding to make sure you see changes occasionally regardless of where you are. For CDs, it seems like each byte is converted into 14 bits, where the longest run of zeroes is 10.
ChaoticNeutralCzech@feddit.org 6 hours ago
I know, among other things there is a time code inserted very frequently between audio data, without which seeking would not be possible at all. However, the audio uses over 90 % of the data so it’s largely responsible for the overall appearance of the track.
Gaja0@lemmy.zip 12 hours ago
It’s really simple.
Sound is air vibrations at different strengths (volume) and frequencies (pitch). Taller waves are loud. Thinner waves are higher pitched. The math looks like this:
Volume * sin( Pitch * time)
Generally, low pitch sounds are louder and easier to see in a sound wave. A kick is really easy to spot. The rest of the weird janky movement of the sound wave is like a bunch of these equations added up to create the sound… generally.
The trick to understanding sound is that it’s a difference over time. The change in pressure is registered by your brain. A record player is literally just the physical transcription of this math and the speaker is just oscillating back and forth to reproduce the sound.
Okay maybe it’s not super simple, but I hope this helps.
ivanafterall@lemmy.world 9 hours ago
tl;dr: magic
fubarx@lemmy.world 14 hours ago
Agent641@lemmy.world 1 hour ago
Calvins’ dads’ explanations were very influential to my shitposting career
Hikermick@lemmy.world 4 hours ago
What’s that a picture of? Doesn’t like a needle and vinyl to me
als@lemmy.blahaj.zone 4 hours ago
It looks like an electron microscope image, hence it being black and white and so close up
biggeoff@sh.itjust.works 2 hours ago
If I’m not mistaken it’s from a shot by the YouTube channel Applied Science. Ben is an absolute genius
Hikermick@lemmy.world 4 hours ago
A microscope? That must be a tiny record player. The needle arm looks like it’s made of clay
RaoulDuke85@piefed.social 15 hours ago
Digital music is just 1s and 0s.
Jackusflackus@lemmy.world 15 hours ago
Digital jazz man!
RaoulDuke85@piefed.social 13 hours ago
It be what it be.
ramenshaman@lemmy.world 9 hours ago
And it must be converted to analog before it goes to a speaker
Valmond@lemmy.world 4 hours ago
Enters the class D amplifier.
For what I understand, it uses the 0 and 1 directly, and just filters the result slightly.
SanctimoniousApe@lemmings.world 15 hours ago
Aww, c’mon - some digit music surely deserves a better rating than that!
MonkderVierte@lemmy.zip 14 hours ago
Uhm
- ridges cause movement
- mechanic/electric amplification
- movement of membrane in speaker
- membrane moves air = sound
Texas_Hangover@lemmy.radio 12 hours ago
Fucking how tho?
MonkderVierte@lemmy.zip 2 hours ago
How air makes sound? It moves our membrane.
humorlessrepost@lemmy.world 11 hours ago
Sound is just patterns of air pressure.
If you were able to go “puh puh puh” in someone’s ear 440 times per second, they’d hear a middle A note.
Imagine a delicate needle in front of your mouth. If you “puh” at it, it wiggles. If you play an A on a violin, the string wiggles 440 times per second. That vibrates the air around the string at the same speed. That air vibrates your ear drum 440 times per second, so you hear it. But it also vibrates the needle. Now let that needle carve a pattern in a spinning disc. That pattern of pressure is now recorded. If you harden that disc and balance a needle over it and spin it again at the same speed, the needle will vibrate 440 times per second. You can use that to make a big floppy piece of paper vibrate 440 times per second. That vibrates the air, which vibrates your ear drum.
Digit@lemmy.wtf 14 hours ago
Some day, I’ll get my (20) albums turned into vinyl.
That day moved a little closer, seeing this.
NaibofTabr@infosec.pub 15 hours ago
It’s vibes man.
mvirts@lemmy.world 11 hours ago
By choice
Kyle_The_G@lemmy.world 14 hours ago
I still don’t get how headphones work and thats always bugged me. how digital files translate into sound and how a little speaker makes that sound.
Natanael@infosec.pub 14 hours ago
Have you seen mechanical music boxes?
The ones and zeroes and bumps and flat areas
null@piefed.nullspace.lol 15 hours ago
It makes your eardrum wiggle in the same shape as the grooves.
Kolanaki@pawb.social 11 hours ago
I mean it’s pretty easy if you understand that sound is just a wave of vibration through a medium.
TropicalDingdong@lemmy.world 12 hours ago
Beep bop beep boop beep
Valmond@lemmy.world 14 hours ago
In Stereo too…
n3m37h@sh.itjust.works 16 hours ago
Bluewing@lemmy.world 1 hour ago
It’s 4:30am and thanks to this thread I’m listening to Dave Brubeck on vinyl…
fossilesque@mander.xyz 51 minutes ago
It’s for science.