What might an optical pickup do with a screen image?
Presumably altering contrast/brightness/etc. to suit.
(
FeralCatMan Unusual disease collector., Tue 19 Jan 2021, 21:48,
Reply)
You'd need a phd and a high enough screen refresh rate to get accurate audio from a video of vibration, I think.
Consider CD audio is 44,100 'frames' per second, while HD video is between 24 and 60 frames per second, so there's just not enough information to work with to reproduce high frequency sounds.
(
brb Learn Ukrainian and prepare for a referendum, Wed 20 Jan 2021, 14:03,
Reply)
Of course, the display is the limiting factor, irrespective of the camera speed.
I imagined if a high speed camera was used, the footage slowed, then corrected for frequency after. As you say, not easy.
(
FeralCatMan Unusual disease collector., Wed 20 Jan 2021, 17:45,
Reply)