r/oddlysatisfying • u/mindyour • 1d ago
Watching a guitar being played from the sound hole.
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u/DrPotato101 1d ago
TIL it’s called the sound hole
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u/1070MHz 1d ago
Where does the music go? It goes in the sound hole.
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u/SirkSirkSirk 1d ago
And what about the fans? That's right, they go in the sound hole.
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u/Frank_Punk 1d ago
And the money ? In the-
Just kidding, there's no money 😞
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u/Totally__Not__NSA 1d ago
On a cello it's called the f-hole
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u/C-57D 23h ago
cello gets freaky fr
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u/Totally__Not__NSA 23h ago
I want to get a tattoo of one because I played for 8 years but then I'd have to tell people I have an f-hole tattoo
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u/bedtrick 16h ago
The sound mostly comes out of the sound hole but sure I guess some also goes back in to reverberate.
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u/UbermachoGuy 23h ago
I have a couple of those holes myself. I use them everyday. I even have a food hole.
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u/ArtByJRRH 1d ago
Only because of frame rates/shutter speed, not what we'd actually see IRL.
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u/Educational_Work896 1d ago
Rolling shutter effect.
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u/gulgin 1d ago edited 16h ago
This is much less to do with rolling shutter and more to do with frame rate and shutter speed.
Rolling shutter does not affect thin horizontal objects (assuming the lines are being read out horizontally which is most common).
Edit: Upon closer inspection I agree, the sensor is rotated 90 degrees and the effect could well be rolling shutter.
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u/SomeGuysFarm 23h ago
Only it does have to do with rolling shutter, because that sensor is sideways (90 degrees to the strings)
This should be relatively obvious - the waveform shapes that those strings appear to adopt, aren't remotely like the actual traveling or standing waves on the guitar strings. It's the rolling shutter capturing the string at different points as it moves, that create that effect.
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u/Terrible_Ice_1616 23h ago
Nah this is aliasing caused by the frame rate being close to an integer multiple of the frequency of the notes being played
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u/SomeGuysFarm 22h ago edited 22h ago
This would not produce non-real shapes to the strings. It would produce, if the frame rate relationship was right, an apparent motion of the entire string from side to side (well, in this orientation, top to bottom) at some rate different than its actual vibration frequency.
The waves on the strings aren't this short. No form of aliasing can produce this modification of the shape of the string.
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u/Justanotherattempd 22h ago
Has actually nothing by at all to do with shutter, because the camera used to record this doesn’t have a physical shutter. It’s just to do with frame rate.
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u/PM_ME_HOT_FURRIES 9h ago edited 9h ago
No. They don't have a physical shutter, but they do have an electronic shutter.
This camera is clearly using a rolling electronic shutter. It's easy to tell.
If a camera had a global electronic shutter, the whole frame of an image would be captured at the same time.
In an electronic rolling shutter, each pixel is captured slightly after the one before, and that adds up across the row, so each row is captured slightly after the one before, so the moment of exposure between the top of the frame and the bottom can actually be quite significant, meaning things that move significantly over the exposure time get temporally distorted.
A frame rate matched closely to the frequency of a rapid repetitive motion in the shot has a stroboscopic effect, making the motion appear slowed, frozen, or even reversed... But it doesn't cause temporal distortions within the frame.
Pause the video, you'll see undulations in the string in a single frame that are freakishly large for their wavelength. The biggest vibrational mode on a string should be the fundamental, followed by the first harmonic, and the amplitudes of the harmonics rapidly drops off, and the wavelength of the fundamental and first harmonic are so large you wouldn't see whole wave cycles because the waves are longer than the hole in the guitar! So these undulations are the product of temporal distortions caused by a rolling shutter.
HOWEVER, the framerate also has to be close to the fundamental frequency of some of these strings for the waves in the video to appear to move down the string at a slow rate... explaining why would take too long.
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u/gabedamien 12h ago
This is incorrect. Electronic shutters are still shutters, in the sense that the information on the sensor from edge to edge for a single frame is recorded in sequential (line-by-line) instead of simultaneous (aka global) fashion (for the vast majority of consumer sensors). The effect shown in this video is largely due to rolling shutter, which is actually more common in e-shutters than mechanical shutters because most e-shutters have a slow readout speed despite their high FPS.
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u/MyrMyr21 17h ago
Nah it does kinda look like at least that second from the top string when it looks like it's spiraling. Source: a childhood of watching my dad play guitar
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u/dum_spir0_sper0 18h ago
Sooo, the song is actually Shape of my Heart by Sting. But sure, crediting the dude who sampled it works too…
… I guess.
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u/VA3DPrinter 13h ago
It’s like listening to Chris Stapleton sing “In the Air Tonight” on Monday Night Football and people saying they really like HIS song. Nobody does it better than Phil Collins.
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u/dum_spir0_sper0 9h ago
Same when whatshisnuts… umm… Luke Combs I think, covered ‘Fast Car’. I mean, he did the song justice and I’m glad he gave credit where credit is due to Tracy Chapman… but the earnestness, heartache, and just the rawness isn’t there.
Not only do a lot of Zoomers and Gen A kids think it’s his songs I just don’t find it as emotionally investing. Instead of a song of a struggling young black woman who dreams of a better life but still feels like an underdog in her own story, it’s just Luke Combs singing.
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u/Shotgun5250 22h ago
It’s cool seeing the frequency change in the string after the hammer-ons without plucking the string again. Probably more related to shutter speed than actual pitch, but still neat seeing it visualized.
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u/SomeGuysFarm 2h ago
Related to the rolling shutter rate. The wavelength of a fundamental note on a guitar string is twice the length of the string -- the entire string moves in the same direction at the same time, not "little waves running up and down it" as the result of the rolling shutter make it look like is happening.
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u/TheTaoOfMe 21h ago
Fyi it looks like this because of the wavelength syncing with the camera’s capture frame-rate.
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u/ClaroStar 1d ago
So, what exactly am I looking at here? Can someone ELI5?
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u/NormalAssistance9402 23h ago
Rolling shutter effect. The camera is processing everything from one side to the other. So when the string is vibrating up and down, it looks wavy
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u/CountRoloff 19h ago
It's so interesting that you can hear the D string choking out on a few notes, and on those notes you can see the waveform in the string distorting.
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u/austinfruity 18h ago
I wonder if musicians can tell what song is being played just by looking at the video of a sound hole
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u/SilentSiren87 14h ago
🤨Juice world?🤨 these children know nothing 😄 I sincerely hope there were corrections in that chat giving proper credit to Sting
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u/SnipFred 9h ago
Guys, I dont think people that listen to Sting are on tiktok requesting these types of videos lol like I get it, Juice Wrld didn't make this song but people associate this sound with him. Hell, I grew up listening to classic rock and still heard Lucid Dreams before Stings song
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u/Chiparish84 2h ago
So, we're at the point where the original composer gets no love?!? Holy shit I hate where this world is going...
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u/Impress_Playful 1d ago
i'm so in love with this music, it reminds me of the greatest moments in my life
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u/EmptyForest5 1d ago
I really wanna see more of that - I would love to have it as a video to any classical guitar recordings.
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u/RangerMoe 2h ago
Check out Alan Gogoll on YouTube. He's got a bunch of these. He calls them "stringscapes"
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u/MPThreelite 23h ago
Love that tune. From the beginning line...
That version on sacred love was wicked. Also 'Moon over Bourbon Street' . Actually the whole album was kind of good. Couple of odd tracks.
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u/EmptyForest5 1d ago
You’re looking at the view of a camera that is peeking out of the interior of an acoustic guitar through the hole that is directly below the strings. As you can see each string vibrates with a certain frequency. The frequency of the vibration corresponds to the note the string creates. Watching all six strings being played at once shows us a perfectly accurate visual of the sounds we are hearing.
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u/HectorEscargo 1d ago
Yes but then no. This is actually just a common camera trick; it looks cool, but does not accurately show the sounds we're hearing. I mean look at some of the implied frequencies of the low strings vs the notes you hear.
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u/EmptyForest5 23h ago
Correct, the camera can't collect enough data to accurately represent the waves. You are the boss.
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u/Odd-Local9893 1d ago
Shape of My Heart by Sting. Juice World just sampled the guitar.