Glynn Morgan
December 6th, 2010, 04:33 AM
Hi,
I made a small community service announcement that will be going on local television. But first I must have the TVC approved and the guidelines are a bit perplexing. Of the 3 years I did film and TVC production at university, I never came across this (part of classifying a commercial):
*Commercials must be preceded by a one kilohertz tone having a constant
relationship to and representing the normal level of the audio material that
follows it.
For analogue systems, the alignment signal will be used to equate the
audio level of the material to the stations’ recording and transmission level
of zero VU. In digital systems, the alignment level will be 20dB below full
scale digital and will be equated to zero VU on the station audio level
meters. The reference level (line-up level) must be minus 20dB with
respect to the onset of digital clipping i.e. –20dBFS (SMPTE RP.155).*
What does this mean? I don't want my audio levels to be too loud, I have heard I should mix it so it peaks at -10 dB, it's just a simple voice over track with a music backing track. Should I limit the audio to not go over -10DB, is there a way to apply this? What is -20DBfs, vegas has no mention of DBfs anywhere.
Cheers!
I made a small community service announcement that will be going on local television. But first I must have the TVC approved and the guidelines are a bit perplexing. Of the 3 years I did film and TVC production at university, I never came across this (part of classifying a commercial):
*Commercials must be preceded by a one kilohertz tone having a constant
relationship to and representing the normal level of the audio material that
follows it.
For analogue systems, the alignment signal will be used to equate the
audio level of the material to the stations’ recording and transmission level
of zero VU. In digital systems, the alignment level will be 20dB below full
scale digital and will be equated to zero VU on the station audio level
meters. The reference level (line-up level) must be minus 20dB with
respect to the onset of digital clipping i.e. –20dBFS (SMPTE RP.155).*
What does this mean? I don't want my audio levels to be too loud, I have heard I should mix it so it peaks at -10 dB, it's just a simple voice over track with a music backing track. Should I limit the audio to not go over -10DB, is there a way to apply this? What is -20DBfs, vegas has no mention of DBfs anywhere.
Cheers!