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Dolby Audio and variable loudness

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Chris Heuer
Dolby Audio and variable loudness
on Mar 19, 2012 at 6:15:47 pm

Hello. I am outputting ads in mpeg 2 format with Dolby audio for local cable ad insertion. On different TVs I hear different results. On older TVs (tube, not flat screen), the audio levels are perfectly balanced with the surrounding programming. On newer (flat screen) TVs the audio sounds much louder when my ads run.

Is this caused by the newer TVs & speakers having the ability to process/output more channels of audio and therefore sounding louder?

The source footage is an mp4 file with 48,000KHz 16bit audio. I export it from Premiere as an Mpeg 2 file with Dolby Digital audio (not Surcode).

I am new to outputting AC3 audio. I need to get my audio sounding the same on all monitors (or close or most)!


Chris Heuer
Freefall FX, LLC

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