Every commercial I've ever produced (around one hundred) had to  
conform to an audio level set by the networks. What happens when the  
network techs load it on a cart is hard to say, but there is a  
defined standard for the original. Similarly there are other  
standards for colors, contrast levels and other variables that must  
be adhered to. When we were doing red cars for Dodge advertising, we  
couldn't make them as red as we wanted to. The network maximum red  
was somewhat of a weak suck to my eye.
Paul
On Dec 21, 2006, at 5:43 PM, Digital Image Studio wrote:

> On 22/12/06, Mark Roberts <[EMAIL PROTECTED]> wrote:
>
>> Right. They're just increasing the average volume of the sound in
>> commercials, thereby increasing the perceived loudness.
>
> No by raising the average they are actually making it louder, if the
> sound pressure were measured by any integrating SPL meter it would
> register louder.
>
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> Rob Studdert
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> Pentax user since 1986, PDMLer since 1998
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