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Adobe Audition CS5.5 
What’s New
New effects and enhanced effects workflows
Adobe Audition includes many of the DSP effects you’ve long relied on, as well as several new 
ones including a DeHummer, DeEsser, Speech Volume Leveler, and Surround Reverb. The 
DeHummer lets you locate and remove constant-level noise sources, such as power line hum. 
The DeEsser removes vocal sibilance from interviews, dialogue, and voice-overs. With a single 
click, the Speech Volume Leveler quickly matches the volume of different actors recorded at 
different distances from a single microphone in the same audio clip. The Surround Reverb lets 
you tailor levels for all channels in 5.1 files, including Center and LFE (Low Frequency Effect) 
channels, gives you a selection of room impulses, and offers precise control of reverb parameters 
and output balance controls. 
Adobe Audition CS5.5 also supports third-party VST and, on the Mac, Audio Units effects. The new 
Diagnostics panel offers powerful tools such as the DeClicker, DeClipper, Delete Silence, and the 
very useful Mark Audio, that automatically adds markers to individual clips according to user-
definable level parameters. 
With the power of the new playback engine, you can manipulate effect parameters while making 
selections and playing back audio—even continue playback while saving a noise print and applying 
noise reduction. The Effects Rack itself is now modeless, which means you can edit and play back 
audio while viewing and adjusting the settings for multiple effects simultaneously for clips, tracks, 
and waveforms. All effects now have presets, which lets you get results without having to spend 
time trying out parameter adjustments.
The new Surround Reverb effect offers level control for the Center and LFE channels, a selection of room impulses, precise 
control of reverb parameters, and convenient output balance controls. New with Audition CS5.5 is the inclusion of effects 
presets for all effects. 
This Effects Rack is shown in Clip View and features the new 
Speech Volume Leveler, which is shown here equalizing 
the volume levels of two actors at widely differing 
distances from a microphone.
The new Diagnostics panel offers DeClicking (shown here 
displaying the successful results of a declicked file), 
DeClipping, and the automatic Mark Audio tool—another 
often-requested feature now incorporated into Audition.