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Old 8th April 2007   #34
georgia
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LEQ-A LEQ-M LM-100 differences

LEQ-M and LEQ-A are measurements, using different weighting curves, of Loudness for long term program averaging. LEQ-A uses A-weighted and LEQ-M uses the CCIR weighting.

LEQ-A has a slight lifting bump in the 100hz to 1kz range and LEQ-M has a flatter lift to around 10k with a bump between 5k and 10k

LM-100 uses a patented methodology selecting the Dialogue from the overall mix and determining average loundness based on either the overall program lenght ( infinite setting ) or based on a sliding windowed duration. These settings will create different end results in measurements. Where LEQ-A and LEQ-M looks at the OVERALL program loudness, LM-100 averages only dialogue.

If you mix a threatrical TRAILER LEQ-M tells you the overall average level of the trailer, music, sfx and dialogue. This is important as there are specific specs for mixing threatrical trailers.

LM-100'a ave number is used for broadcast specs for mixing dialogue.

cheers
geo
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