User Guide

CHAPTER 6
72
Edit Menu – Edit View
Double-click on any of the files in this list to see a more detailed account of 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.
3 Normalize Tab
This is the area where you specify how you’d like to have Adobe Audition normalize the listed waveforms.
The Normalize Tab of the Group Waveform Normalization Dialog
Normalization You can normalize to an average level, or to a specific level.
• Normalize to Average Level of Source Files normalizes each file using the average level of all of them.
• Normalize to a Level of lets you specify the normalization level (entered in decibels) for the whole batch of waveforms.
Note: Unlike Effects > Amplitude > Normalize, percentages aren’t used with the Group Waveform Normalization function
because it’s not peak-based, but RMS-based. The peaks may not go above 25%, or may go over 150% and be the same
loudness.
Use Equal Loudness Contour Check this box to have Adobe Audition use an equal loudness contour, where the middle
frequencies are most important. You’d normally want to have this box checked. Since the ear is less sensitive to very high
and very low frequencies, and much more sensitive to those frequencies between 2 kHz and 4 kHz, two different pieces
of audio with the same RMS amplitude, but that contain different frequencies, will sound like they have differing
volumes. Checking the Equal Loudness Contour box will ensure that the audio has the same perceived loudness
regardless of what frequencies are actually present in the sound file.