Pre-delay, Reverb time, Size – Audio Damage ADverb User Manual
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1. Pre-Delay
The pre-delay simply delays the incoming signal before it reaches the reverberators, and hence how long the
reverberant sound will be delayed relative to the dry signal. Typically pre-delay is added to a reverb effect to
increase the perceived size of the simulated reverberant space: the bigger the space, the longer it takes the
reflected sound to reach the ears of the listener. Pre-delay also has creative applications. If the processed
signal is delayed enough, relative to the original signal, it becomes a separate sonic element. This works
particularly well with percussive sounds if the REVERB TIME is set fairly short.
ADverb’s pre-delay has a range of zero to 200msec, or 0.2 seconds.
2. Reverb Time
The REVERB TIME knob controls how long it takes for the reverberated sound to fade out. This control has the
greatest influence on the overall sound of the effect. The range of this control is 0.1 to 9.9 seconds, which is
approximately the amount of time that it takes the reverb sound generated by a full-volume signal to fade to
silence.
Long reverb times are associated with large acoustic spaces, e.g., a large concert hall has a longer reverb
time than your bathroom. Usually you will not want to combine a long REVERB TIME setting with a small SIZE
setting (see below). You may even find that some combinations of extreme settings will create oddly
resonant, feedback-like noises. While most plug-ins will reduce the ranges of parameter values to prevent odd
behavior, we at Audio Damage strive to provide creative options to our users rather than limiting their choices
for the sake of safety and predictability.
3. Size
The SIZE knob varies the apparent size of the simulated acoustic space. Its name is a bit of a misnomer since
ADverb is a digital simulation of a plate reverb, and plates can’t change size.
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However, as will be evident
when you listen to it, rotating the SIZE knob changes the “bigness” of the reverbated sound. The range of this
control is 1-99 meters, although this is a somewhat arbitrary scale.
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Some plate reverbs do provide a means to physically move the transducers towards or away from the edge of the plate, a
process which is in some sense similar to the changes within ADverb’s signal-processing code when you adjust its SIZE
knob.