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

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   Message 40,102 of 41,683   
   Scott Dorsey to gah@ugcs.caltech.edu   
   Re: dBFS   
   19 Nov 10 21:01:43   
   
   XPost: rec.audio.pro, comp.dsp   
   From: kludge@panix.com   
      
   glen herrmannsfeldt   wrote:   
   >   
   >It does seem that the FS applies to measuring devices, either   
   >analog or digital meters.   
      
   NO.  FS applies ONLY to digital system.  When all the bits are set to 1,   
   the meter goes to FS.   
      
   >It seems to me that there is still some uncertainty in the   
   >meaning of dBFS.   
   >   
   >Well, consider that CDs are considered to have 96dB (or some   
   >similar number) of dynamic range.  That is comparing a full   
   >scale signal (just about impossible in a live recording) to   
   >one that is all quantization noise and no signal.   That   
   >doesn't seem quite fair.   
      
   When all the bits are 1, the meter reads 0dBFS.  When the bits are   
   all zero, the meter reads -96dBFS.  It doesn't matter how difficult   
   or realistic it is to generate such a signal in the analogue world,   
   the measure is ONLY relevant for digital signals.   
   --scott   
   --   
   "C'est un Nagra. C'est suisse, et tres, tres precis."   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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