Adobe AUDITION 1.5 - Manual (Page 253)

245 ADOBE AUDITION 1.5
User Guide
3 Click the Analyze Loudness tab, and then click Scan For Statistical Information to
display amplitude statistics for each waveform. Double-click a file in this list to see more
detailed statistics, including an RMS histogram and a clipping profile. (See “Under-
standing statistics on the Analyze Loudness tab” on page 245.)
4 Click the Normalize tab, and specify how you want to normalize the waveforms. (See
“Setting options on the Normalize tab” on page 246.)
5 Click Run Normalize.
Understanding statistics on the Analyze Loudness tab
When you click Scan For Statistical Information, the Analyze Loudness tab displays the
following information:
Eq-Loud Is the final loudness value with an equal-loudness equalization curve that takes
into account frequencies to which the human ear is most sensitive. If you select the Use
Equal Loudness Contour option in the Normalize tab, this value determines how much to
amplify the audio to normalize it.
Loud Is the final loudness value without equal-loudness equalization. If you don’t select
the Use Equal Loudness Contour option in the Normalize tab, this value determines how
much to amplify the audio to normalize it.
Max Is the maximum RMS (Root-Mean-Square) amplitude present. This value is based
on a full-scale sine wave being 0 dB, and it conforms to the width specified in the Advanced
section of the Normalize tab.
Avg Is the average RMS of the entire waveform. This value isn’t used for normalization.
% Clip Is the percentage of the waveform that would be clipped as a result of normal-
ization. Clipping won’t occur if limiting (in which loud passages are decreased in volume)
is used; instead, the louder portions of audio are limited to prevent clipping. In general,
avoid values higher than 5% to prevent audible artifacts from occurring in the louder
portions of audio.
Reset Clears all of the normalization statistics for the files in the list.
Double-click a file in this list to see more detailed statistics, including a complete RMS
histogram, which shows the relative amounts of audio at each loudness level, and a
clipping profile, which shows how much clipping will occur for each decibel of amplification.
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