Analog vs. Digital

       A record player with an excellent needle can pick up about 22,000 hertz.  A plastic compact disc has a maximum sound of 16,500 hertz I heard when they first came out.  The computer chips for the CD player are maxed out for the "blips", laser holes for bits, which might make maximum hertz, at 16,500 hertz. 
Although From Wiki:   "The frequency response of the standard for audio CDs is sufficiently wide to cover the entire normal audible range, which roughly extends from 20 Hz to 20 kHz."  
       I don't think this is true.  probably made up by a CD salesman or company, to make them sound equal to record players.  I think this is a lie.  Because it is a round number, not 19,797,255 htz.  So I don't think they measured it. 

        There is a maximum microscopic space allowed by the metals minting aluminum CD faces.  So a digital recording for a CD can not exceed a certain number of hertz (still doing research).  There is a maximum rate of reading by the laser too.

       Analog sound playing is less "flat" than digital.  Flat toped wave forms, as seen on an ociloscope, are from a digital recording, and round top wave forms are from analog recordings.  The round tops have a little more extra sound to them, where as the flat tops are a single sound for a longer period, although this is "microscopic" or very fast milisecond sounds.  but there can be a little bit of a difference.  


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