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iphone 4 inside a guitar oscillation! VERY GOOD!

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Published on Jul 14, 2011

Playing folk rock, johnny cash, bluegrass wildwood flower, John mayer's stop this train with a camera inside the guitar.

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Comments • 463

runreilly
Woah woah woah....  Has anyone tried this out?  Why don't we see the same peaks and troughs when we film a guitarist from OUTSIDE his guitar?  I smell bullshit.  Cheesy iphone technology bullshit.
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Blake Brown
With about a third of these comments saying that this is a FAKE, it appears to be worthy of a Mythbusters episode. I was skeptical, so I tried it myself. I used 3 different models of iPhones:  4S, 4 and 6. All failed to replicate the effect. Then, assuming the observed vibration patterns were not fake, I suspected that it might be an artifact of the computer's video player. I imported all the files. . . no change, no effect.  One of my HS students (I'm a teacher) suggested that perhaps the phone needed to be rotated inside the guitar perpendicular to the string so that the strings make a 90 deg angle to the phone lengthwise. This time we used an iPhone 5S.   IT WORKED. . .TWICE!! We saw the peaks and troughs of the waves just like this video. Just to be sure, we rotated the 5S  90 deg away from the orientation that worked. Then, the the effect was NOT OBSERVED. So, the camera orientation to the strings seems to make all the difference in seeing the guitar string standing wave shapes!   I'm not familiar with the rolling shutter effect, but whatever video effect is operating here with these iPhones,  it's geometry-dependent.
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gh0un
Rolling shutter effect. Yes the camera has to be perpendicular to the strings. It basically happens because the pictures that are taken for a video (24 frames per second = 24 pictures per second), or whatever your framerate is, are not taken all at "once" (for lack of a better word). They are taken in a scanning fashion, starting on the top, scanning all the way down to the bottom (light is let in at the top first, going all the way down to the bottom). This means that things that are moving vertically in regards to the camera, can appear multiple times on the screen, but only if they move quickly enough. Swinging strings move up and down multiple times per second, so thats why you can pretty much see their swinging patterns due to the rolling shutter effect.
tutimix2013
Interesting! Sadly, it Didnt worked flor me :( I tríed all the positions with my iPhone 5s, and it Didnt worked, please help 😪
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Plesh Io
100 % Fake.The strings oscillate the same.They don't change shapes or make variations of waves depending on a different note.  Conclusion: Until now, 1.747 people are really stupid.
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Justin Yupyupyup
Plesh Io its called rolling shutter effect, Look it up. Dumbass!
Gary Smith
it works you idiot
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Cody Pittman
This effect is the same as you see when driving next to another car down the highway.  At certain speeds, it will appear that their rims are spinning backwards.  This is an optical illusion that is actually occuring in real time, and relies on the human eye being able to perceive roughly 24-32 frames per second (refresh rate in hertz).  With this video, the iPhone 4S camera records at 24 frames per second, which is about 3-5 frames below the average human eye threshold.  Thus, when the screen is plucked, we can see the sound waves manifest on the strings.  A typical guitar operates in the sound range from 80-1200hz.  So, with a frame rate of 24 fps, any sound in that 80 - 1200hz range that can be divided by the multiples of 24 (1,2,3,4,6,8,12,24) would become clearly visible to the human eye.  Cool stuff.
Lee sOo
fake.. iphone batteries doesn't last that long
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Harald Schevik
Lee sOo lol
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Lemony Snicket
I do like the video. Pretty cool. But I just want to say that this does not show accurately  how the strings actually look. This image  happens because the phones camera chip cannot process the actual movement of the strings accurately . Faulty digital process.  This is not what strings actually look like when played.. 
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AsuraDandy
That's pretty much it, the fact the camera can't keep up, its like when we look at a car's wheel when it's driving. The fact it looks like it's going a different direction is because we can't keep up with the movement.
Anubhav Vashishta
+Js Fravel , I think you might have missed the point of the video if you feel that way, buddy.
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Steven Myers
This is fake. Sounds change speed to accomplish different notes, they don't change shapes. Sounds can have different shapes, but it would sound distorted; not like this. 
View all 19 replies
Ryan Bissell
+Steven Myers +Jr Rice and, as previously explained, there are not really different shapes of waves on the strings in this video.  It is an artifact of the cheap video camera.  A high quality camera would faithfully record their true nature: sinusoidal.
Ryan Bissell
+Steven Myers I recommend not referring to a frequency as being 'faster' or 'slower' than another; please use 'higher' and 'lower' instead.   Speed of sound refers to the propagation of a sound wave (of any frequency) through some medium. Frequency * Wavelength = speed of sound.  If frequency goes up, wavelength gets shorter by the exact same factor, causing the speed to stay constant, regardless of frequency.
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Bonifilio Soto
Screw the strings....The song was bad ass!!
Jacob Bob
I agree
rebellutionarywayz
Wow, what beauty. Look at the wave length each string has seeing an alga rhythm for the first time is truly remarkable. Thank you for the video!
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rreeddppeenn
+David Harris kk
David Harris
+rreeddppeenn naw bro its alga rhythm or as i call it alga riddim
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Gabriel Castillo
I don't give a shit if it's fake or not, I just want the name of the song
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Gabriel Castillo
thanks
Avinash Yatiyawela
1:42 is Stop this train by John Mayer
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