This ^

This ^

This ^

The slow mo guys video idea maybe?

problem: high speed cameras require more light per frame (hence faster shutter speed). You'd either need a brighter light source or longer exposures, which defeats the purpose. Maybe one of those crazy "pop balloons from 100 meters" lazers, but then what kind of setup could handle that laser? The balloon would either get sliced up or the wall would get burnt up.

Just a prove of how lazy our brain in nitpicking details and interpret it in a familiar way.

@@ThatGuy-zw4le Or just how complex it is, allowing us to feel a 3d shape on a 2d material

@@petiscarabe1583 Good point

@@petiscarabe1583 well it's kinda silly because our vision is 2D just like an image on the screen and we get depth perception in our brain. It's just how human/animal brain works. Nothing surprising about it.

@@bayraktarx1386 but then is our vision still in 2d? I mean if our brain recreates depth perception thanks to our two different pov from our two different eyes, can we still say our vision's 2d? For instance, what about a guy with only one eye working: he obviously sees in 2d as he can't feel depth. Are we just the same? I mean we're probably agreeing, just interpreting the words differently, but it's nice to have an other opinion since I've been asking myself those funny questions lol for a long time

Or maybe the fact that the piece of mirror can be to little and the laser just goes out and we loose a part of the pass

@@sengertrystan6003 if that were the case he would have noticed it IRL

@@loganiushere that's why I said maybe, I wasn't sure

@@sengertrystan6003 plus the beam would probably be distorted by the glass edge.

Yep, that's what I came here to say.

What kind of speaker is needed? I would like to try this.

@@Paul-ou1rx I used one from an old radio. Like a boom box. It needs to be large enough to move enough air and this is usually easier with lower frequencies, so it needs to have some bass to it. I used a large balloon and stretched it over the open end of the can. Used a hot glue gun to build a little mound of glue in the center of it and broke a compact to get a small piece of mirror then glued it to the top of the glue mound. Then either cut a hole in the other side or use a can opener to completely remove the other end so it's open, then you can set it on a speaker thats pointing up. As long as the container is over it so the sound waves are directed toward the balloon, the balloon will vibrate in relation to the sound waves hitting it. I used on old piece of metal stripping and screwed it to the outside of the coffee can and zip tied the laser pointer to it. The metal was flexible enough that I could aim it to insure it was reflecting off the mirror. I also took the laser pointer apart and attached a variable watt power adaptor to it so it would run off of that and not run watch batteries down after a few minutes of using it.

…and I made one in the 1960s with multiple mirrors and my Dad’s slide projector as a spotlight to hit them all. Pretty funkadelic! I was lucky to have a father who tolerated my experiments. Edmund Scientific had the parts and plans.

Kerim Kerim or even a human being.

You just described the Fourier Series.

ukposts.info/have/v-deo/qmake42LeoOrk58.html

@@jamesr1894 The great 3B1B!

@@siddgangadhar1234 That's great that it's actually a thing

My first thought as well

Here let me bring your memories back. Winamp with AVS active

Winamp had a fully customizable visualization feature . Had played a lot of sine cos tan on that

Dude I had to watch that in school assembly for like 30 minutes XD "YoU wIlL ObEY aLl TeaChERs"

😂😂😂

Waves are waves sound light radio micro slow waves are detected with your ears medium wave are heat faster are the colors or light we detect with our eyes. Ultra violet is faster than we can detect normally. Then radio... wait radio lots of info in those waves. 👋

I can hear the picture!

Bro you are going to flip when you find out what spectrograms are!

What is a great game to get the app and cut off with the cutting screen 📺

Jsab players in a nutshell

thats all i can see when its flipping around, and when the lasers line up like perfectly its so satisfying

Agreed

To get a 3D shadow, you need a 4D object

@J Boss that's not how it dimensions work, bud

@J Boss he's talking about mathematical dimensions, not physical ones

great ass idea

just set this up myself, im gonna try it. with a violet, green, and red at the same time.

Blue + Red + 3D glasses. :)

@@willdaugherty8619 link me a video

@@willdaugherty8619 did youever do this?

I did the experiment and one of the most fascinating shapes were combinations of sine and triangle waves.

Had this exact thought

Haha exactly. I instantly started thinking how to do this myself with a synthesizer

Is this what heaven is ?

😮

Same bro same

+1. Me too! This was mind blowing!

No clue

O: someone please do this

@@105ug can you try record it? !

gtx420ti update?

@@greasyt9400 they died

The more simpler the relationships between the notes are the more pleasing they generally sound to us

That’s because our eyes are made of fractals and those shapes we’re looking at are fractals.

​@@ThePinkBinkswhat

What happens with the antennas?

9:00 this is *sAucE fOr inspIRAtiOn*

Its like "Have a look at it, but dont have any idea what it is." What a legend

That code really doesn't need comments. In most cases, I find comments to be more distracting than helpful. They can sometimes be nice to give a high-level overview, but some people think it funny to comment every single line to explain what it does. I mean... I can just read the bloody code. I think, ideally, you don't need any comments. If your code is straight-forward and not too clever, and you use good names for functions and variables, your code should be readable without any.

Yndostrui the problem with reading the code is that it only tells you what it does, not what the coder intended it to do :D a good comment explains why, not what.

Well written, maintainable code should not need a lot of comments. I say that as a purist, not a lazy engineer.

Chris: Exactly! morodochable: Well, yes. I did mention that higher-level comments can be useful. I don't think they are warranted for such a small project, though.

Jonnyreverb .. Love it!!

The idea came from a home laser show a friend had; the Laser FX from Spencers Gifts in the early 1990's...

I had the same experience except I was the friend who watched the building of said machine :) In Australia.

That's my thought on it as well. The image is sampled/stored in rows, or even pixel by pixel. From one corner to the opposite corner of the sensor matrix. It's interesting to see the gaps. It's showing that not only is the moving image representation of reality in video not continuous, neither are the still images that are taken

Yes, if the shutter is rolling across the frame slower than the laser is moving across the frame, then it will have to have multiple start and end points.

I'm an audio engineer (see my other comments #Nyquist & #3Dwaves) It is possible that the wave is 'Clipping' a "Square Wave".

Mason Sellman yea that would be interesting..

That was exactly my tought too ... it remembered me something like the movie “the Arrival”. I know its not the same, but the emotional response I had was very a like.

Mason Sellman ..its already been done.... Trust me

Runes created by shining rays of light into a crystal at different angles....it's been done.

yeah

my thoughts to

yes i instantly thought of jerobeam from this

It would be interesting to play Jerobeams music on this setup.

thats what I thought - it might be possible to use this methode to project oscilloscope music to a wall- without a oscilloscope

Oli K - I am pretty sure this wouldn't work, since the oscilloscope figures rely on different physics compared to this effect. But I am not sure, how different they really are. Maybe going to fly by the physics department of my university and plant this idea in their heads.

Thanks :)

Most amazing light sound visualization

hey, is there any physics book about vibration and waves?

@@saturn3478 look up Hans Jenny's work on cymatics: a study of wave phenomena (

​@@weneedmoreconsideratepeopl4006 what about chemistry? I was looking to understand the beauty behind chemistry to better understand the universe, as in math physics biology, but I couldn't find any interesting title in Chemistry actually because I have not many UKposts channels or books to learn magics in Chemistry as many as I have in physics and math.

The reason his explanations seem so good is because he isn't talking about the mathematics of anything

@@saturn3478 en.m.wikipedia.org/wiki/Acoustics

Fish Smell Bad that actually makes so much sense 😂

Fish Smell Bad oh actualy that sounds brilliant XD

I believe that is the case. I also wrote something similar before seeing your comment :) I hope this explanation reaches the video poster :) It would be interesting to see what he thinks of it. :) Liked for more visibility :)

Light is to fast, I don't think thats possible

Lucas Boisneau i don't think you understand what he meant. He means the shard of mirror on the balloon moved out of the lasers path and was just hitting the balloon. It has nothing to do with the speed of light just movement of the balloon.

Jessentis yep

Ur smart

Those patterns as audio represent a stereo pair of signals, where left is one axis and right is the other axis, when they drive a beam simultaneously they produce a deterministic pattern when visualized. That is very different from what is happening here where you have an indirect frequency response where the axes are coupled through a physically dynamic system and the signal is monotone and indirectly driving the amplitude through a physical process of resonant harmonics.

@@dorbie What topics in physics should I read to understand this phenomenon/ experiment?

@@GGGTOP802 It's laser light reflecting off a mirror. That in itself covers a few subjects some more advanced than others and with hidden depths should you choose to delve. Light, optics & reflection and lasers. Then there's the deflection of the mirror driven by a wave, so acoustics, wave theory, resonance and perhaps a spring-mass simulation of a membrane. Then the thing that drives the sound, a speaker involving electromagnetism, and the tone generator to generate the wave electricity and electronics (probably analog). Of course if you're happy with the high level description then the most interesting part is the complex resonant pattern of the reflected acoustic wave on the membrane that turns a 1D sound wave into a complex 2D / 3D deformation. It's a deep well of physical phenomenon depending on what parts you want to pick apart and how deep you want to go, e.g. the laser alone could lead you to learn about Quantum Mechanics.

@@dorbie I think Dominik is correct in his identification of the phenomenon. I think the sound waves are reflected from the edges, back towards the centre creating standing waves. Because it's on a balloon surface (2-dimenstional), you get 2d waveforms which go in and out of phase to create lissajous patterns. They look distorted probably due to mirror placement and bowl shape.

@@JJKebab9 It's not a bad analogy but not entirely accurate either.

I’ve noticed more of the sharp notes or off tune notes seem to be more ugly in terms of it being symmetrical unlike the notes that goes to together

Rolling shutter it is indeed. Solution is to do the experiment yourself, It's quite intriguing.

Film cameras don't have a global shutter they have a literal rolling shutter

Chase Weeks Ah, TIL! I’ve never shot on film. Just assumed.

+

As related to this comment, have a look at this excellent explanation of the rolling shutter effect using slow motion by Smarter Every Day: ukposts.info/have/v-deo/nH6HqIOkg6Kf0Hk.html

not rolling shutter continuous frame transitions

It’s known as “aliasing” caused by the frame rate. Rolling shutter only applies if there is relative motion between the camera and the subject.

@@DavidMcCoul "Rolling shutter only applies if there is relative motion between the camera and the subject." -- which there is. The laser is a dot, and only a dot, but it is moving around. At any given moment only a portion of the image sensor is being scanned. If you have a camera where you can set shutter speed, then setting it to 1/30th of a second, at 30 frames per second, ensures the stop of one frame is the start of the next and there's little or no gaps.

​@@thomasmaughan4798 Good point about the frame of reference of laser and camera; I agree that the jittering could be due to rolling shutter. However, we don't know what Steve's shutter speed was when filming, so I can't discount aliasing as a possibility as well. Also by the Nyquist Theorem, it is always best practice to set your shutter speed (in DSLRs) to at least twice that of your frame rate to avoid aliasing. That would mean a shutter speed of 1/60 s for 30 fps.

David McCoul take a look at the explanation of rolling shutter then you’ll understand. ukposts.info/have/v-deo/nH6HqIOkg6Kf0Hk.html

Albert Tománek My thoughts exactly. You probably need two speakers to make two waves which can interact with eachother in infinite ways and an enclosure which produces reasonably predictable reflections

AI not needed, nor useful in this case. Just some research and plain calculations.

gopher even a computer should suffice. Just coffee done parameters and done.

It's already been done by Jerrobeam Fenderson, he has tons of these ukposts.info/have/v-deo/qqSDamlknJmGr6M.html

i was thinking the exact same thing

you would have to isolate the x and y movement to separate speakers

They are called lissajou patterns (spelling)

@@JenniferEliseAtchiso Lissajous. Audio vectorscopes perform this very task.

I think you would also need a speaker that could play 192khz and lightly a far more precise setup, but I can't think why it wouldn't work on the same principal.

It would definitely make sense.

kc3vv I also think rolling shutter effect

kc3vv came here to say this.

It's easy to test by rotating the camera 90 degrees and song the differences. The cutoffs in the freeze frames were in a vertical motion, if it's rolling shutter they should be in a horizontal motion.

This is what i wanted to say, though i think the math does not add up. the time the sensors are lit should be much much longer than the time shutter needs to go over the thing. So there should also be a lot more lines compared to endings. Though i just remembered the shutter often consists of multiple parts, so that could explain it. Though then again i would expect to see multiple very short lines

circuit dreamer oscilloscope music look it up

There's a musician named Jerobeam Fenderson who makes music that creates shapes on an oscilloscope. It's mesmerizing to look at.

circuit dreamer *penis shape*

ukposts.info/have/v-deo/o4CGmJ6kaYx2jqM.html

IchBinEin While I appreciate any mention of Jerobeam Fenderson, this is a different concept than an oscilloscope and his music wouldn't generate the right pictures with this setup.

That's neat!

Ayush Ranjan true

+1

yes. a speako.

Why did you reply to me?

indjev99 obviously... because I'm stupid and pressed the wrong button.

Andro121 haha I get it😂😅

*( ͡° ͜ʖ ͡°)*

Upside down laserdick

laser dick

@@vaishnavplays203 hahahahhaha welcome to the joke do you have a reservation

Orion, did you ever leave for work and forget your belt?

orion khan Real shit over here-

Oh man... You're making me want to apply to work at the one in my school (one of the biggest in the US).

Great idea Devil's Advocate. I would like to see that.

Me too!

Me three!

Brilliant

Devil's Advocate me four

Nice!

alien force 3

**cheers in 20 y/o**

I was looking for someone who notices

😅

🅱️enis

you dont quote the correction as you are saying it right now and not quoting it.

Yeah, I was gonna say it

And maybe a circle mirror, so the teetering will be even

Nah I'm pretty sure that would just create a line, if it was in the center it would only move up and down

This video has inspired me drastically. Now to attempt to incorporate this knowledge into my creations

@@patrick1532 technically, no, because the mirror tilts slightly in every wave, following its shape. and even if it was like you thought, it would create a dot, not a line.

@@GraveUypo But it wouldn't tilt at all if it was perfectly centered on the speaker, the very center just moves up and down linearly. And it would make a line since the laser is at an angle and the distance between the laser and its contact with the mirror would be changing. Obviously it wouldn't be a perfect line because it would be impossible to place the mirror perfectly in the center, but it would be close.

Ooo my dog cave update plz

oinse

I was about to suggest that as a possibility. There's a lot of movement going on in this pattern, and it's a higher amplitude than the rest, so I could imagine the edge of that piece of mirror being lifted into and blocking the beam momentarily, as the mirror bobbed around.

The start and finish has everything to do with the fact that the laser, no matter how fast it moves, is only a point. The camera shutter being open collects the light from the laser's point as it travels across the pattern for each individual frame and makes the lines appear in the video.

makes sense to me! 👌🏽

it could also be the rolling shutter

@@doaltplusf4448 that would be something I know nothing about. so I differ to you sir.

Ooh, yes!

Explanation of multiple loose ends: digital sensor does not take "instant picture" like film does. The after the sensor is exposed to light, the data need to be written to memory line after line (like text on screen). See explanation from "SmarterEveryDay" ukposts.info in video "Why Do Cameras Do This? (Rolling Shutter Explained) - Smarter Every Day 172" ukposts.info/have/v-deo/nH6HqIOkg6Kf0Hk.html

I’m not sure this is correct. Think of a laser tracing out a circle very quickly. At each instant, one point is lit up on the surface. For convenience let’s say the laser is always firing at the area represented by the top scanline at the start of each exposure. Let’s also say it’s rotating anticlockwise. If the laser traces a circle in the same amount of time it takes to read off one scanline, you’ll see a full circle. If it takes the length of a full exposure, you’ll see two points - one at the very top and another about two thirds of the way around, as the downward scan intersects the laser as it’s heading back up to the origin. If it takes twice as long as a single exposure, you’ll see a semicircle as the laser intersects the scan line on every scan. Now what if the laser completes a full circle in the same time it takes to scan two lines? The first line has the starting point. On the next line, the laser sweeps back up from the bottom, and you only the see dot on the right. The li’e after that, the laser sweeps out the left side again, and you see the dot on the left, but not on the right. So you end up with a pattern where either the left or the right half of the circle is visible on alternating lines - but never both. If the laser completes a full circuit faster than the line rate, then you always see the full pattern. Less than that, you start getting partial patterns. We saw that when Steve turned the frame rate up very high earlier in the video. But that’s the kind of distortion you always end up with - smooth pulses along the continuous pattern. The pulses always line up with the scan direction, because they’re an artefact of the scanning process. The terminators we saw around 6:03 don’t all line up like that.

Came here to say this...

The image is one still shot so there is no "rolling". My best guess is that it has something to do with the way the image sensor works. Perhaps not every pixel is activate for 100% of the 1/25th of a second? Also - he covered the rolling shutter effect and how he corrected for it.

@Roxana Şanta Lissajous patterns require two inputs, this only one

@@mbrusyda9437 The two inputs are pitch and roll of the mirror.

especially octaves :)

It would be very messy. A single note has 3 pure frecuencies and combining more than 3 gets wird

3 notes for a chord

manuel cavieres A single note has a single frequency unless you’re playing an actual instrument with certain timbre

ukposts.info/the/ECl4aNz5hvuRzW5fgCOHKQ.html

Wouldn't that happen only at the edges of the figure?

David Wührer Not necessarily. In the middle, it could have ended up hitting the edge of the mirror instead of the top

Nihseeth Pandey That would also be at the edges of the figure.

Agreed. Not sure if some lateral displacement motion of the mirror on top of the tilt could happen for certain frequencies but it could explain the several strating points even when not in the edge. High speed footage of the mirror could help.

I think it has to do with the rolling shutter, the camera doesn't scan all the parts of the video at once, and it usually starts at the top and scans downwards. The vibrations probably wouldn't be as over the top as you think.

Yeah, I caught that too, and don't know jack about cameras, so I assume he meant that automatic would choose your settings for you.

@@davilathegreat Different cameras have different modes besides *just* auto and manual, byt yes, in automatic mode, parameters like the shutter speed, ISO value, lens aperture, compensation... automatic adjusts *everything.*

Yes, that probably is why you can see many star/end points on some frames

That for sure, and the laser might also clip off the edge of the mirror as well.

shaking mirror= laser misses mirror

@Shawn Camburn lmaoo

I dont know, the surface he made to make the symbols is probably not reproducible

@@NwoDispatcher it could be streamlined to be consistent using different materials and exact measurements to make a standard, universal language of sorts

@@Catnippy what you would want to do is use an oscilloscope and plug in two microphones, one for the X axis and one for Y. This would make it "universal". It's been done.

Roberta - I was thinking along the same lines. Kind of an alien contact language of sound translated to a visual representation. Or a reversal of light to sound. Or what if whale sounds were played through a more precise device than a broken chunk of mirror randomly glued to a haphazardly stretched piece of rubber? A constant standard of precision. I suppose it would still be meaningless to humans...