Ooh that's really cool that they're using the laser speckle pattern. I like the fact they exploit the rolling shutter too. Something which https://people.csai

Ooh that's really cool that they're using the laser speckle pattern. I like the fact they exploit the rolling shutter too. Something which https://people.csail.mit.edu/mrub/VisualMic/ https://people.csail.mit.edu/mrub/VisualMic/ also does. There are devices which are called laser doppler vibrometers, which might also be able to do this by pointing at the strings/base of the guitar? There do seem to be videos of laser doppler vibrometers being used with guitars on youtube, but I'm not sure if the soundtrack that goes along with them is just from a normal mic. I had a little play with laser speckle patterns to detect keypresses, as they can help find very subtle changes to a surface - https://www.anfractuosity.com/projects/fun-with-speckle-patterns/ https://www.anfractuosity.com/projects/fun-with-speckle-patt... (by 'diffing' the patterns)