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   rec.audio.tech      Theoretical, factual, and DIY topics in      41,683 messages   

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   Message 40,106 of 41,683   
   Steve Pope to aclark@danvillesignal.com   
   Re: dBFS   
   20 Nov 10 08:03:14   
   
   XPost: rec.audio.pro, comp.dsp   
   From: spope33@speedymail.org   
      
   Al Clark   wrote:   
      
   >0 dBFS is a digital specification that represents the maximum level that a   
   >data converter can convert. For example 0x7FFFFF... or 0x800000.. assuming   
   >twos complement.   
   >   
   >It follows that the level of all signals will be <= 0 dBFS   
   >   
   >It has nothing to do with the rms level at all.   
      
   I woulda said that a 0 dBFS signal has the RMS level of a sine wave   
   that just barely doesn't clip  a converter (or, a hardlimited channel;   
   it does not need to be a converter).   
      
   (This is an important concept, of sorts, in that is shows that   
   an N bit converter has a full-scale-signal to quantization noise   
   ratio of 6*N + 2 dB, not the 6*N + 5 dB that some texts claim.)   
      
   One can debate these things.  Most outcomes of such debates are   
   equivalent within a factor of two.   
      
   Steve   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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