PRESONUS Revelator io44 Owner's Manual page 57

Audio signals have very wide peak-to-average signal-level ratios (sometimes referred to as dynamic
range) which is the difference between the loudest level and the softest level. This can create problems
when you're setting input levels because when enough gain (or volume) is applied to capture the softest
level at its best, one cough, laugh, or excited moment can overload the input, resulting in distortion... and
not the cool kind.
A compressor works by limiting the dynamic range of an audio source to make it sound more consistent
and even. By setting the maximum level, the compressor makes sure that any audio signal that exceeds
that volume is reduced to match it.
Choose between Low, Moderate, High, and De-Ess. Low will provide the least amount of compression,
High will provide the most. Compression presets optimized for electric guitar, bass guitar, vocals, and
acoustic guitar are also available.
Use the De-Ess setting if you notice a lot of "sibilance" in your speech. Sibilance is the pronounced pres-
ence of the "s" or "sh" sound. Depending on your accent and speech pattern, it can be more or less pro-
nounced.
Power User Tip: While it may be charming in casual speech, sibilance can quickly become distracting because
it resonates at a higher frequency that can become grating when heard repeatedly. The goal of a de-esser is not
to remove the "s" sound entirely, rather, it's intended purpose is to level it out so that it's even with the rest of the
consonants. In other words, you'll still sound like you.
For more advanced compression controls and to learn about the different compressor models onboard
your Revelator io44,see
5.1 Fat Channel and Voice FX
Advanced Features and Customization.
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