PRESONUS Revelator io44 Owner's Manual page 62

Power User Tip: This is especially helpful for bass-rich sound sources (baritone voice, acoustic guitar)
as adding too much reverb in low frequencies can muddy your sound.
Pre-Delay. Pre-Delay is the time (in milliseconds) between the end of the initial sound and the
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moment when the first reflections become audible.
Power User Tip: Imagine you're on a stage in a large music hall. You stand on the very edge of the
stage and shout "Hello world!" toward the center of the hall. There will be a brief pause before you hear
the first noticeable reflections of your voice, because the sound waves can travel much further before
encountering a surface and bouncing back. Adjusting the pre-delay parameter on a reverb allows you to
change the apparent size of the room without having to change the overall Size. This will give your mix a
little more transparency by leaving some space between the original sound and its reverb.
Reverb (Amount). To change the amount of Reverb affecting Channels 1 and 2, use the Reverb con-
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trol at the top of either Channel to dial in the amount to taste.
5.1 Fat Channel and Voice FX 62