pjbass Posted August 4, 2009 Share Posted August 4, 2009 I thought i'd share some great footage of the movement of bass strings taken with a high speed camera. It's on vimeo so i'm not sure i can embed it: [url="http://vimeo.com/4041788"]http://vimeo.com/4041788[/url] Quote Link to comment Share on other sites More sharing options...
EssentialTension Posted August 4, 2009 Share Posted August 4, 2009 [quote name='pjbass' post='560463' date='Aug 4 2009, 05:52 PM']I thought i'd share some great footage of the movement of bass strings taken with a high speed camera. It's on vimeo so i'm not sure i can embed it: [url="http://vimeo.com/4041788"]http://vimeo.com/4041788[/url][/quote] Sexy. Quote Link to comment Share on other sites More sharing options...
bubinga5 Posted August 4, 2009 Share Posted August 4, 2009 Bass strings dont vibrate like that..there some camera strickery there me thinks.. Quote Link to comment Share on other sites More sharing options...
bythesea Posted August 4, 2009 Share Posted August 4, 2009 (edited) [quote name='bubinga5' post='560477' date='Aug 4 2009, 06:12 PM']Bass strings dont vibrate like that..there some camera strickery there me thinks..[/quote] Probably down to the shutter moving over the sensor. For each frame the sensor is exposed as the shutter moves across it, so the string has moved between the start of the sensor being exposed and the end (for each frame). That isn't a clear explanation but one of the first instances of this type of effect (for an ordinary photograph) was [url="http://www.masters-of-fine-art-photography.com/02/artphotogallery/photographers/jacques_henri_lartigue_01.html"]Lartigue's car shot[/url]. Is the result of using a focal plane shutter as opposed to an iris shutter. Like the film though Edited August 4, 2009 by bythesea Quote Link to comment Share on other sites More sharing options...
JimBobTTD Posted August 4, 2009 Share Posted August 4, 2009 Nice. The flame on the neck is also n-i-c-e!!! Quote Link to comment Share on other sites More sharing options...
ahpook Posted August 4, 2009 Share Posted August 4, 2009 that's amazing ! hard to believe it's real, although i'm quite prepared to believe the camera buffs Quote Link to comment Share on other sites More sharing options...
pjbass Posted August 4, 2009 Author Share Posted August 4, 2009 (edited) i guess it does seem a bit unreal. I assumed it might be a frame/refresh rate thing. Similar to when you see alloy wheels on an accelerating car reverse direction. Your eyes can only see things so fast so you see a strobe effect. Edited August 4, 2009 by pjbass Quote Link to comment Share on other sites More sharing options...
Firebird63 Posted August 4, 2009 Share Posted August 4, 2009 What's amazing is how the guy fitted a Nikon 50mm lens on a Canon 5D mk2. Quote Link to comment Share on other sites More sharing options...
Alien Posted August 4, 2009 Share Posted August 4, 2009 It's caused by beat interference, the same as you get if you tune by harmonics What you're actually seeing is the difference in frequency between the frame rate (in this case Hz & FPS are the same thing) and the note frequency. There's a point at around 0:57 where there's a standing wave effect caused by the frequencies being the same (or an exact multiple of each other). A Quote Link to comment Share on other sites More sharing options...
bythesea Posted August 4, 2009 Share Posted August 4, 2009 [quote name='Firebird63' post='560614' date='Aug 4 2009, 08:59 PM']What's amazing is how the guy fitted a Nikon 50mm lens on a Canon 5D mk2.[/quote] Hadn't noticed that. There are adapters available that will do that, though you lose all the autofocus etc. Quote Link to comment Share on other sites More sharing options...
bythesea Posted August 4, 2009 Share Posted August 4, 2009 [quote name='Alien' post='560622' date='Aug 4 2009, 09:07 PM']It's caused by beat interference, the same as you get if you tune by harmonics What you're actually seeing is the difference in frequency between the frame rate (in this case Hz & FPS are the same thing) and the note frequency. There's a point at around 0:57 where there's a standing wave effect caused by the frequencies being the same (or an exact multiple of each other). A[/quote] Now I've seen that this was done on a DSLR the thought of the shutter running at 25 fps or higher would be rather good engineering Quote Link to comment Share on other sites More sharing options...
Jobiebass Posted August 4, 2009 Share Posted August 4, 2009 [quote name='Firebird63' post='560614' date='Aug 4 2009, 08:59 PM']What's amazing is how the guy fitted a Nikon 50mm lens on a Canon 5D mk2.[/quote] Dont get me wrong I dont know ANYTHING about cameras. But my friend just sent his off to a specialist to shim his cam down to fit a lens that wouldnt normally fit. Quote Link to comment Share on other sites More sharing options...
Josh Posted August 4, 2009 Share Posted August 4, 2009 (edited) Crab-Monkey. 7:34 Alright 'Den. Edited August 4, 2009 by Josh Quote Link to comment Share on other sites More sharing options...
paul h Posted August 4, 2009 Share Posted August 4, 2009 I have seen the same thing once when playing bass in front of the tv. Positioning the strings so I could see the screen behind showed the wobble. Quote Link to comment Share on other sites More sharing options...
RhysP Posted August 4, 2009 Share Posted August 4, 2009 There's an old Pantera video showing something very similar on the guitar & bass (can't remember which song it's for though). Quote Link to comment Share on other sites More sharing options...
Dood Posted August 4, 2009 Share Posted August 4, 2009 [quote name='Alien' post='560622' date='Aug 4 2009, 09:07 PM']It's caused by beat interference, the same as you get if you tune by harmonics What you're actually seeing is the difference in frequency between the frame rate (in this case Hz & FPS are the same thing) and the note frequency. There's a point at around 0:57 where there's a standing wave effect caused by the frequencies being the same (or an exact multiple of each other). A[/quote] Maaaaaan Andy! You beat me to it!! lol - Beat Frequency Oscillation, was how I was taught it, back in the day! ;o) Quote Link to comment Share on other sites More sharing options...
stingrayfan Posted August 4, 2009 Share Posted August 4, 2009 That's cool - I like it. Quote Link to comment Share on other sites More sharing options...
dlloyd Posted August 4, 2009 Share Posted August 4, 2009 [quote name='paul h' post='560635' date='Aug 4 2009, 09:19 PM']I have seen the same thing once when playing bass in front of the tv. Positioning the strings so I could see the screen behind showed the wobble.[/quote] Yep, +1 Quote Link to comment Share on other sites More sharing options...
Tee Posted August 4, 2009 Share Posted August 4, 2009 [quote name='RhysP' post='560648' date='Aug 4 2009, 09:28 PM']There's an old Pantera video showing something very similar on the guitar & bass (can't remember which song it's for though).[/quote] 5 Minutes Alone That's what i thought of too. Quote Link to comment Share on other sites More sharing options...
fatgoogle Posted August 4, 2009 Share Posted August 4, 2009 Damn cool, i think, if only it looked like that all the time. Quote Link to comment Share on other sites More sharing options...
lateralus462 Posted August 4, 2009 Share Posted August 4, 2009 [quote name='RhysP' post='560648' date='Aug 4 2009, 09:28 PM']There's an old Pantera video showing something very similar on the guitar & bass (can't remember which song it's for though).[/quote] 5 minutes alone Quote Link to comment Share on other sites More sharing options...
Kiwi Posted August 4, 2009 Share Posted August 4, 2009 same principle is what causes the rotor blades in these shots of helicopters to be frozen. Engineers now actively use this principle to study the way stresses change on the rotor blades as the helicopter performs various manouvers. Quote Link to comment Share on other sites More sharing options...
RhysP Posted August 4, 2009 Share Posted August 4, 2009 [quote name='Tee' post='560725' date='Aug 4 2009, 10:40 PM']5 Minutes Alone That's what i thought of too.[/quote] [quote name='lateralus462' post='560732' date='Aug 4 2009, 10:43 PM']5 minutes alone[/quote] That's the one, thanks guys. (I was listening to "Far beyond driven" earlier today too - my brain is rubbish). Quote Link to comment Share on other sites More sharing options...
fatgoogle Posted August 4, 2009 Share Posted August 4, 2009 The helicopter ones are a bit eerry in a way, i dont know why, it just shouldn't be. Quote Link to comment Share on other sites More sharing options...
garry Posted August 5, 2009 Share Posted August 5, 2009 a kind of related tanget, heres a wee vid about diy cymatics, 'visible sound'. making dancing shapes by pouring corn starch on your favourite speaker cones. [url="http://blog.makezine.com/archive/2009/08/collins_lab_notes_diy_cymatics.html"]make online visible sound[/url] Quote Link to comment Share on other sites More sharing options...
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