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Electron microscope slow-motion video of vinyl LP

Discussion in 'Studio Lounge' started by Sean G, Jul 3, 2016.

  1. Sean G

    Sean G Well-Known Member

    Ever wondered what those grooves really looked like up close on your vinyl LPs'?...

    audiokid and DonnyThompson like this.
  2. DonnyThompson

    DonnyThompson Distinguished Member

    Thanks for sharing this Sean, it's a cool vid. :)

    This guy has some cool toys... I like how he mentioned how his "Sputter Coater wasn't working right", he was so causal and matter-a-fact about it, like this is something that everyone has laying around the house, as if it was a coffee maker, or a toaster that needed repaired. LOL...

    When he said that, I laughed and thought to myself, "yeah, those damn sputter coaters can be so temperamental ... I really need to get mine fixed, too.".. LOL
  3. Sean G

    Sean G Well-Known Member

    It just turned up randomly in my youtube feed, maybe because I was searching last week on vinyl lathes.
    I found it really interesting so I thought I would share it...who would have thought those tiny grooves would look the way they do, and I liked the way he explained how the L & R channels work between the stylus and the groove...something I wasn't aware of before this vid.

    That reminds me Donny, I need to get my sputter coater looked at as well...its spitting as opposed to sputtering;)
  4. Boswell

    Boswell Moderator Distinguished Member

    You can consider a stereo record groove as being M-S encoded, ostensibly for mono compatibility. Stereo FM radio has a similar encoding method, but the M channel is in the audio band and the S channel is modulated on to a sub-carrier sitting above upper limit of the M channel bandwidth.

    In the stereo LP record groove, the vertical stylus component is the S information and the lateral (side-to-side) component is the M information. A stereo cartridge does the job of decoding this mechanically to an L-R signal by using coils mounted at 45 degrees either side of vertical. It was good to see the tracking process in action in the video.
    Sean G and audiokid like this.
  5. audiokid

    audiokid Staff

    Thanks for sharing that Bos. (y)

    And Sean as well. (y)

    Here is more interesting stuff. http://recording.org/threads/vinyl-records-and-analog-remasters-coming-back.53163/

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