XPost: rec.audio.pro, comp.dsp   
   From: dpierce@cartchunk.org   
      
   glen herrmannsfeldt wrote:   
   > In comp.dsp Dick Pierce  wrote:   
   >   
   > (snip, I wrote)   
   >   
   >   
   >>>In EE, RMS can mean different things.   
   >   
   >>Not in any "EE" I ever encountered. It means one thing:   
   >   
   >>   sqrt(sum(X1^2 + X2^2 ... +Xn^2) / n)   
   >   
   > It used to be, for DVMs, that was called True RMS.  When   
   > they figured out how to actually do that electrically.   
   >   
   > Maybe they all do now, so it isn't a problem anymore,   
   > but it didn't used by be that way.  Also, it isn't   
   > for the peak-to-peak reading VTVM, normally calibrated   
   > with an RMS (assuming sine) scale.   
      
     Sorry, wrong. RMS, or "root-mean-square," is a term   
   that predates voltmeters and DVMs and VTVMs. It is a   
   mathemateical, yea, a statistical mathematics defintion.   
      
   That is has been misused, misappropriated, improperly   
   implemented, misunderstood or whatever does NOT change   
   the fact that it has a precise, well understood and   
   universally agreed-upon mathematical definition.   
      
   That you can cite one or more examples of a piece of   
   instrumentation that claims "RMS" merely points out   
   that there are different claims, some valid, some not,   
   of implementations. It does NOT siggest that there are   
   different meanings to the term.   
      
   --   
   +--------------------------------+   
   +         Dick Pierce            |   
   + Professional Audio Development |   
   +--------------------------------+   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)