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What the name of old system before digital system for record songs

  1. Feb 19, 2014 #1
    what the name of old system before digital system for record songs.....
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  3. Feb 19, 2014 #2

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  4. Feb 19, 2014 #3


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  5. Feb 19, 2014 #4


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    Thomas Edison invented something called "Phonograph".
  6. Feb 19, 2014 #5
    Before the phonograph or gramophone, the way to record songs was with sheet music.
  7. Feb 19, 2014 #6


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  8. Feb 19, 2014 #7
    what is difference pixel shape between digital and analog screen
    Last edited: Feb 19, 2014
  9. Feb 19, 2014 #8


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  10. Feb 19, 2014 #9


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    Analog magnetic tape decks like the ones used in recording studios have very high quality and are/were used to make the "masters" for recording sessions.



    Digital pixel height / width aspect ratio is 1 / 1. NTSC analog HD pixel aspect ratio is also 1 / 1. NTSC standard definition 480i pixel aspect ratio = (480*4) / (704*3) = 10 / 11 or .909090... . This make it's it really awkward to interpolate / upconvert NTSC standard definition video (like a standard DVD) on a digital monitor. The image could be horizontally stretched by 10% to end up with 1 /1 aspect pixel ratios, but the stretched image would be noticable.

    Analog CRT's can adjust beam width, sweep rate, and transition rate, so aspect ratio is variable with these system. Mitsubishi used to make HDTV's that use 3 CRT displays, one red, one green, one blue, in a rear projection system (the CRTs pointed up to a mirror so the image was reflected on a display screen), but 2006 was the last year they made these. The CRT based HDTV had 480p and 1080i as "native modes", taking advantage of beam adjustment so interpolation was only used for 720p, interpolating 4x4 squares of pixels into a 6x6 squares of pixels.

    The old analog CRT computer monitors, being able to adjust beam parameters can handle a wide variety of resolutions, and although there is a mask with a fixed number of "holes", the beam can partially cross and/or start/stop between mask hole boundaries, allowing for what at the time were high resolutions, like 2048 x 1536, or 1920 x 1440 (both 4:3 ratios). Sony made a "wide" screen CRT that could display 1920x1080 (16:9 ratio). Example image of a "white" arrow from a CRT screen. Note the partially painted "holes" at the edges. If you stand far enough back you'll see a white arrow.

    Last edited: Feb 19, 2014
  11. Feb 22, 2014 #10


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    Oh, so true.
    And before that is was through verbilization and memory from one generation to the next.

    Geez, I wonder if any parent sings to their child, let alone knows of any bedtime songs to lull their child to sleep anymore!

    Another method, besides memorization, printed and electronic was mechanical. Everyone should know about the wind up jewelry box with the mirror, spinning balerina and music when opened. A drum with pin projections rotated and doing so the pin projections picked at metal forks tuned to certain notes and a short little melody was played.

    The next big thing was the self playing piano....
  12. Mar 7, 2014 #11
    Wow, thanks for making me feel old. I think I will go sell my 8-track player now. ;-)
  13. Mar 25, 2014 #12

    Sounds so much like a homework question....
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