25a3b78b   
   From: dpierce@cartchunk.org   
      
   ChrisCoaster wrote:   
   > It's the same wherever I go.  In the car, I switch from my mp3 jack or   
   > CD to a FM station and instinctively I have to turn the volume down by   
   > at least 1/3rd.   
   >   
    > ...   
    >   
   > Because I really don't believe that radio stations' own processing is   
   > solely to blame for my having to crank UP the volume when going from   
   > AM/FM > a CD or mp3 or cranking DOWN the volume after switchng from CD/   
   > mp3/phono > AM/FM.   
   >   
   > 1. Does the tuner section on consumer stereo equipment/portables/auto   
   > sound incorporate some compression/limiting circuitry?  2. Is the   
   > tuner input level set intentionally louder than the line inputs(CD,   
   > aux/mp3, etc)?  3. Or, is it a combination of 1 and 2, on top of   
   > compression/other processing employed by the radio stations?   
      
   There is of course the alternative explanation that the   
   average signal level generated by your MP3 device is less   
   than a perfect match for the expected input level of   
   your auxiliary input, and that it's a simple gain mismatch.   
   If your MP3 device shows a consistent lower level on several   
   playback systems, that could well be the case.   
      
   No, that couldn't be it: it's too simple, to logical, and too   
   straightforward an answer.   
      
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   +         Dick Pierce            |   
   + Professional Audio Development |   
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