Instruments and Effects

160 Chapter 11 Reverb
Digital recording introduced digital reverb effects, which consist of thousands of delays
of varying lengths and intensities. The time between the original signal and the arrival
of the early reflections can be adjusted by a parameter commonly known as predelay.
The average number of reflections in a given period of time is determined by the
density parameter. The regularity or irregularity of the density is controlled with the
diffusion parameter.
Ever-increasing computing power has made it possible to sample the reverb
characteristics of real spaces, using convolution reverbs. These room characteristic
sample recordings are known as impulse responses.
Convolution reverbs work by convolving (combining) an audio signal with the impulse
response recording of a room’s reverb character.
This chapter describes the reverb effects included in Logic Studio:
 “AVerb” on page 160
 “EnVerb” on page 161
 “GoldVerb” on page 162
 “PlatinumVerb” on page 164
 “SilverVerb” on page 167
 Space Designer: Space Designer is a convolution reverb and is described separately
in Chapter 12, “Convolution Reverb: Space Designer,” on page 169.
 “Soundtrack Pro Reverb” on page 168
AVerb
The AVerb is a simple reverb effect that uses one parameter to control both the effect’s
early reflections and diffuse reverb tail: Density/Time. Small value settings tend to
generate clearly discernible early reflection clusters, generating something similar to an
echo. High values result in a reverb-like effect.
The AVerb is a quick and easy tool for creating a range of interesting sonic space and
echo effects. The AVerb may not be the best choice for the simulation of real acoustic
environments, however.
 Predelay: Determines the time between the original signal and the early reflections
of the reverb signal.