It's also available commercially in the form of laser turntables: https://en.wik... | Hacker News

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		exhilaration on June 16, 2015 \| parent \| context \| favorite \| on: Microscopic footage of a needle moving across the ... It's also available commercially in the form of laser turntables: https://en.wikipedia.org/wiki/Laser_turntable and http://www.laserturntable.com

mturmon on June 16, 2015 [–]

And don't miss the part about the IRENE system, at the bottom of your wikipedia page:

http://irene.lbl.gov

It uses microphotography of the disk surface, somewhat similar to that in the OP. They have recordings as early as 1860!

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