XPost: rec.audio.pro, comp.dsp   
   From: spope33@speedymail.org   
      
   Randy Yates   wrote:   
      
   >spope33@speedymail.org (Steve Pope) writes:   
      
   >> I find the former of these two definitions more widely used than the   
   >> latter.   Any signal whose RMS value is the same as that of a full-scale   
   >> non-clipping sine wave is 0 dBFS.  So a clipping square wave is   
   >> +3 dBFS.   
      
   >Yeah, that bothers me. I like the reference level at FS square, so that   
   >no signal EVER goes about 0 dBFS. But "like" and "define" are two   
   >totally different things...   
      
   One problem with the square wave is the measurment ends up bandwidth-   
   dependent.  So it wouldn't be exactly 3.01 dB higher than the full-scale   
   sine wave; it would be a little less than 3.01 dB, depending.  This would   
   make it harder to calibrate a level meter with repeatable results.   
      
   Steve   
      
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