XPost: rec.music.gdead, sci.electronics.design   
   From: SaySooth@TheMonastery.org   
      
   On Fri, 04 Mar 2011 13:17:39 -0500, Dick Pierce    
   wrote:   
      
   >Sergey Kubushyn wrote:   
   >> Yep, there is no clean 10KHz square wave from vinyl, I agree.   
   >   
   >That's becasue there is no 10 kHz square wave AT   
   >ALL from vinyl.   
      
      
     No.  There are NO square waves at all on vinyl.   
      
     The slew rate of the leading edge of the pulse is zero.  The stylus,   
   much less the vinyl itself cannot handle, much less accurately reproduce   
   it.  Then, there is that instantaneous track wear issue that worsens with   
   each play.   
      
   > Even the grossest approximation   
   >thereof requires a minimum of a 30 kHz bandwidth.   
      
     The medium is NOT made for the source signal described.  In fact,   
   neither are sonic transducers (speakers).   
      
   >You disagree? Then show us a reproducible example   
   >of an LP that can produce a 10 kHz square wave that's   
   >distinguishable from a 10 kHz sine wave.   
      
    Cannot be done.  It is idiocy to claim it can, and idiocy to entertain   
   it at all, in fact.   
      
   > > But it is better than that abruptly cut at 22KHz.   
   >   
   >How is cutting off below 20 kHz better than cutting   
   >off at 22 kHz?   
      
     Pretty funny, some of the things folks say.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)