Specifications

Digidesign Plug-Ins Guide102
reverb Size before Time. Setting Time to its max-
imum value will produce infinite reverberation.
The HF Damping and Reverb Color controls also
affect reverb Time.
Attack Attack determines the contour of the re-
verberation envelope. At low Attack settings, re-
verberation builds explosively, and decays
quickly. As Attack value is increased, reverbera-
tion builds up more slowly and sustains for the
length of time determined by the Spread param-
eter.
When Attack is set to 50%, the reverberation en-
velope emulates a large concert hall (provided
the Spread and Size parameters are set high
enough).
Spread Controls the rate at which reverberation
builds up. Spread works in conjunctions with
the Attack parameter to determine the initial
contour and overall ambience of the reverbera-
tion envelope.
Low Spread settings result in a rapid onset of re-
verberation at the beginning of the envelope.
Higher settings lengthen both the attack and
buildup stages of the initial reverb contour.
Size Determines the rate of diffusion buildup
and acts as a master control for Time and Spread
within the reverberant space.
Size values are given in meters and can be used
to approximate the size of the acoustic space
you want to simulate. When considering size,
keep in mind that the size of a reverberant space
in meters is roughly equal to its longest dimen-
sion.
Diffusion Controls the degree to which initial
echo density increases over time. High Diffusion
settings result in high initial buildup of echo
density. Low Diffusion settings cause low initial
buildup.
After the initial echo buildup, Diffusion contin-
ues to change by interacting with the Size con-
trol and affecting the overall reverb density. Use
high Diffusion settings to enhance percussion.
Use low or moderate settings for clearer, more
natural-sounding vocals and mixes.
Pre-Delay Determines the amount of time that
elapses between the original audio event and
the onset of reverberation. Under natural condi-
tions, the amount of Pre-delay depends on the
size and construction of the acoustic space, and
the relative position of the sound source and the
listener. Pre-delay attempts to duplicate this
phenomenon and is used to create a sense of dis-
tance and volume within an acoustic space.
Long Pre-Delay settings place the reverberant
field behind rather than on top of the original
audio signal.
Early Reflections Controls
The Early Reflections section has controls for
the various early reflection parameters, includ-
ing ER setting, level, spread, and delay.
Calculating Early Reflections
A particular reflection within a reverberant field
is usually categorized as an early reflection. Early
reflections are usually calculated by measuring
the reflection paths from source to listener.
Early reflections typically reach the listener
within 80 milliseconds of the initial audio
event, depending on the proximity of reflecting
surfaces.
For an interesting musical effect, set the Pre-
Delay time to a beat interval such as 1/8,
1/16, or 1/32 notes.