Guitar Oscillations Captured with iPhone 4
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- čas přidán 10. 07. 2011
- I just happened upon this trick when testing what it was like filming from inside my guitar. *Note this effect is due to the rolling shutter, which is non-representative of how strings actually vibrate.
Tips:
• You must have the strings brightly backlit to get the camera to capture at such a high frame rate (pure conjecture). You can see how the effect fades when the buildings come into view.
• Use a pencil
*This was used with the front facing camera, try the back camera, it may capture better! (tried it, it didn't look as good for me)
There is a heated discussion with real science over at reddit
/ guitar_string_oscillat...
*UPDATE here is the 'tracklist'
:14 - "Tears in Heaven" by Eric Clapton
:56 - "Signe" by Eric Clapton
2:57 - Snippet of "Tomorrow Land" by John Scofield
- the rest is just noodling around.
Also, I never thought I'd be known as a 'youtube guitarist', I just play for fun- I'm actually a motion graphics designer/animator. Check out www.justkyle.com
follow me on twitter! / justkyle - Hudba
Prof. Pan and his ME 303 students at Waterloo love you! :p
Seriously cool view of guitar strings vibrating from inside the instrument!
The dude litterally yeeted the phone inside the guitar lol
Hey Vsauce, Michael here
I am distorted.
I love how well this is mic-ing the guitar as well. I think someone needs to take advantage of this for a music video or something. Also, Unplugged has to be one of Clapton's best albums ever.
Actually guitar strings aren't oscillating like that (they just rock back and forth), that's an effect caused by the way your camera picks up the images from the strings.
The camera takes "strips" of pixels very quickly from left to the right, so it does a sort of sampling on the vibration produced by the string.
For low frequencies the framerate of the camera is sufficient to visualize the correct vibration, and you get a quite sinusoidal wave, for higher frequencies it is not and you get some strange stuff (a bad sampled signal).
So, if this is not working for you, you just need to turn your phone 90 degrees (either way, it doesn't matter).
And, if you want to have this explained better than I can do, search for vsauce's video about distortion.
Anyway, it's a pretty awesome video
Actually, the strings do oscillate. That's why harmonics exist.
Strings do oscillate, but not like that.
Yes they do. The idea, that a string oszillates in a Sin Wave is a simplification. In fact, there are multiple wavelength that are possible on a string of a certain length and strength. Simply speaking: A sting of length L can oszillate with a wavelength of 2L for example. This would mean that the string doesnt move at the ends where it is attached to the instrument but the middle of the sting changes from mountain (oszillating up) to a valley and back. Annother possibility is a wave, that has a point that doesnt move in the center. So the wavelength is exactly L. You get a "mountain" and a "valey" on the string whenever the Point at 1/4 L reaches full oszillation. Obviously we can continue like that, considdering more and more "non moving points" along the string shortening the Wavelength to 2/3 L, 1/2 L, 2/5 L etc.
All these wavelength are possible. Depending on the instrument, the actuall wave is made up of certain percentages of these so called harmonics, causing the actual waveline to look jagged like in the video, since the multiple waves are superimposed (meaning they add their oscillation together).
This causes the guitar to sound different from a piano, even though they both play the same note (say a C). The percentages of what the actual wave is made up of also changes over time, which causes a guitar to sound different right after you strike the string to when its been going for a few seconds. This can also be seen in the video since the "shape" of the wave changes over time.
@Falthy I've got a oneplus3, Yes it does
very nice! it's true: the video doesn't represent the actual movement (you would require ridiculously high frequency camera to capture that), but I think there is some form of aliasing going on there, maybe the camera has an imaging technique that allows some of the transverse wavelets that build up the entire wave to find themselves in apparently periodic positions, so in some way those oscillations that you can see are indeed depending on the string note!
This happens for the same reason car wheels appear to be going backwards on TV...
Really cool example of the rolling shutter, and I'm so glad you played some Clapton. Great performance of Signe, such a beautiful piece :)
If the picture scanning acts orthogonally to the string (going from start to finish) then the waveform is actually plotted. BUT the 'frequency' (how many waves you see across the string) will vary depending on the ratio of scanning speed to string speed.
------------> Scan line 1
------------> Scan line 2
!
|
|
| string
|
|
'
------------> Last scan line
say the string completes one wave (from middle to right, right to middle, middle to left, and left to middle) in the time it takes for the scanner to complete a frame (finish the image). Assuming the wave starts as the scanner starts, at the top the string is in the middle. 1/4 of the way and the string is on the right. 2/4 of scanning completed and the string is back in the middle. 3/4, the string is on the left, and 4/4, back in the middle. If the scanner speed was now doubled, you would only see the first half of the wave. If the scanner speed was halved, then at half way the string would already have completed a wave, meaning you would see two waves.
Theoretically, if the wave was faster than the scanner speed (while still being visible as a continuous wave, and not blurred) but not so fast that a whole wave could not be represented clearly (e..g. a whole wave occurring every scan line or faster), AND the vibration of the string died out before the scanner finished the image, you would see a continuous, decaying waveform that represents the actual sound (albeit without a guide to the pitch). Magic.
fucking simpleton
DarkDrift0r Judging by your favorites you're quite the nerd.
Wibbly Wobbly Timey Wimby Camera Stuff
Wimby? It's supposed to be wimey. Darn auto-correct.
Lmao 😂
Omg yes
Might that be a reference? To a BBC series probably?
Oh hello doctor, didn't see you there
Congrats on getting ready to hit 1 million. Incredible.
This video is the best of Signe, not only the great imagery (the stroboscopic effect) but also the fact its inside the guitar it picked up loud and clear, the others on youtube tend to be poor quality audibly :(
Great Vid! thanks for posting ^^
Thats awesome.
Looks like sound waves!
ok, ill give it my best go on how to explain this: A rolling shutter on a camera means that the camera scans from left to right (or right to left) and not the whole frame at once. This means that while the strings are vibrating, our eyes see a blur, but the camera scans it and shows where the string was during the scan. I know its hard to comprehend but i'm sure you guys will get it. This is terrific and genius and the guitar playing was awesome! keep it up!
BACK TO THE VIDEO.
Great video dude. It just made me so...happy. And it also kind of tripped me out, but that's okay too.
I studied all about this in physics: Oscillations, SHM, Sinusoidal waves, Standing waves, waves on a string, string instruments, transverse waves, periodic waves,resonance.. There is so much physics here in this video. Sadly, i bet only 1% of the people who see this video have taken university calculus physics.
Its interesting to solve the differential equation of vibrating string and see whether your solution "fits" the video.
Idk I learned all this in high school o.O
Why are you sad that people watching this haven't done a physics degree?
Calculus and physics education is useful for understanding the details, but you don't need either to understand the concept of an alias frequency! Video peeps will understand it no prob, and experienced string players will get the standing wave part of it without any knowledge of calculus.
It's no so hard, I have only taken 2 physics course and I have seen it. And I don't think these are so complicated concepts. They're complicated if you want to do the math with them and compute them, but to appreatiate them a smaller intuition is enough.
Nice guitar skills man!
Should grow some longer nails, though :P
Life is full of wonder! Absolutely awesome!
Could watch this all day.
For some reason I just love the "MMMM?!" in the beginnning!
Lol
00:53, I want to learn how to do that
Thank you. I love you. I never knew guitar strings vibrated Like that. One step closer to understanding sound waves .
That is awesome. You can see the shape of the wave that makes the sound.
@iisan1 I accidentally pasted that section twice when I was editing. If I had known this would explode all over the internet I would have been more careful heh
@Elliot Gooding true lol
Yes, the video would have to be at 40 000 fps to accurately represent the sound up to 20 kHz (roughly the upper boundary of what we hear). I do not think we have cameras able to capture more than 200 fps unless they were made for some ballistic analysis so there is a long way to go.
This video shows some alias of the wave that does not represent the actual vibration.
Would be cool to revisit now that 240 fps is commonplace and 1 million fps is attainable
@@colemyers3231 imagine what the camera capabilities will be in 9 more years
Seeing the sine and complex wave patterns as the strings are plucked, although not the actual way they vibrate, is an amazing angle on guitar playing. Great little science lesson for children to see as well.
one of the best signe cover's i've heard
what is the song name that you played from 0'57(for about 30 sec)? it's very nice.
Signe Eric Clapton
the G string is a little flat XD
I smell the world's greatest acoustic guitar music video coming. Panning through the streets of San Francisco, walking a rooftop in New York, staring into Niagara Falls, all with those awesome oscillations as an overlay.
you give a new meaning to "riding the wave"...i liked it...
who is here from vsauce?
How did you get the phone back out?
Joseph D it’s easy, just think.
Use your headphone
With his hands
D string looks crazy
Gorgeous! I have to say, it reminds me of how early cameras captured wagon wheels in such a way that they appeared to rotate backwards slowly. It's due to the frame rate as relative to the actual vibration frequency. Fascinating, scientific, a beautiful! Extra factoid: each note, one octave higher, has twice the frequency. One octave, therefore, is half the frequency. The most common reference is A440. The A above middle C has that vibration speed. This is a fantastic video!\
I remember being a smol bean and watching this thinking it was real.
It is real, this effect can only be seen from the rolling shutter effect which is a problem that a lot of cameras have.
Nope, sound vibrations aren't real. Totally photoshopped. Fake news.
Zeeker it's real tho
Cameras with no physical shutter have something called a 'rolling shutter' and it causes weird wavy artifacts like this.
What else does it cause artifacts on, for comparison?
windwardpro Anything that moves too fast for it to capture properly. One example are propellers. It causes them to look completely detached.
On the other post you commented on, I went into further detail why the waveform looks so good with the rolling shutter. Its because the camera itself is being vibrated by being inside the guitar. That makes the strings appear to move more than they actually are.
OK- that makes sense, because, yeah, I'm realizing the wavelength for these notes, especially the low strings, is WAY bigger (longer).
windwardpro Well, they are longer cause the wavelength is longer, they are wider because low frequencies travel more efficiently than high, so it has a greater vibrational effect on the body :) That is why you can hear cars with a lot of bass from a mile away.
I find the high string even more interesting, with the weird wavelength it shows.
This is amazing bro!
Beautiful video! Bravo!
thats bullshit my iPhone doesn't do it
what iphone do you have? i doubt you have an iphone 4 wich has a rolling shutter in the camera instead of the normal type wich captures a complete exposure at the same time.
Someone should give this guy an award. this is really awesome!
Thank you so much for this trick, this is awesome !
this is way too cool! and on top of that, great music to accompany!
Thanks for posting. Thoroughly enjoyed this. What a cool idea.
Very nice Kyle, really enjoyed it, thanks.
@Kyosuke2 Yes you are correct, I was just trying to give an example to which non audio enthusiasts could understand. It is not an exact representation of the waveforms but to be able to see waveforms of that precision in a guitar string is pretty amazing to see. It is still a good learning tool to see the difference in shapes of the low frequency vs high frequency oscillations.
Dude this is about to virally explode in the musician community. Look for your views to go up up and away :D
You actually play so nice!
The rolling shutter effect is amazing
this is outstanding!
Love the Sound and Vision of Music...;-) Keep making more and have a nice day!
Awesome guitar playing by the way !
awsome dude...
nice think you stumbled upon this... awsome effect ;)
Great song choice!!! "Tears in Heaven" made this video for me... Bravo!!!
beautiful!!
THATS FREAKING AWESOME!
Wow, that is so cool!!
Thanks for the link to that conversation too :)
i tried it and it totally works
thanks man!
This is hypnotic
Wow man cheers for the awesome video.
Wow, this is great! I can see sine curves with the song of EC's "signe".
Wow,this is epic!!
Very neat! It is creative to make something nice out of an error/problem.
This was beautiful.
If you have an old monitor (the ones that make a lot of static electricity in the screen when you turn them on) you just place the guitar between the monitor and your eyes and pluck the string. each semitone has a very different movement. If you play D you can see waves running one way and when you play D# youll see it going the other way, some notes will give waves that seem to be going slow-mo and smooth, others look very unstable, its fun
This is beyond cool!!!
Mind Blown!
amazing!!
Good job Tony.
Very educative!
Brilliant!
Very cool video and beautiful songs. (I really like the one you played at around 1:00)
Very cool. I'll have to try this.
This is great!
That's pretty cool man, thanks for sharing :)
Fabulous!
this is sooo cool
Very cool!
dude thats really cool!
AWESOME!
Very cool use of physics!
now I know im not crazy when i see this as im glansing at my guitar strings!! THANK YOU :P
Badass. Really cool
@TrialVersion8 "Rolling shutter (also known as line scan) is a method of image acquisition in which each frame is recorded not from a snapshot of a single point in time, but rather by scanning across the frame either vertically or horizontally."
Awesome!
Fascinating video :)
man, this is really cool :) new way how to see the music
this is great!
This cool trick is actually useful for setup, it lets you estimate the amplitude of string vibration, which influences the minimum string height to avoid fretting.
i came for the oscillation and stayed for the nice guitar jamming
great job!
Awesome! Thank you
awesome melodies :) like it!
Thanks for letting us know.
this is amazing:)
Yes. It's actually quite easy to reproduce a single note on an osciliscope. The camera's effect captures the wave forms and an osciliscope can be used as wave form generator. An oscilscope has a screen to show what the waveform that your generating looks like so its just a matter of some knob turning to get the pictures to match up.
beautiful... never thought it could be seen like that =DD my playing will never be the same
awesome!
very nice! very true as well. This is a subset of the alias effect that I described above, but you nailed it right on the head.