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CHAPTER 20. LIVE AUDIO EFFECT REFERENCE
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The Size parameter controls the room's volume. At one extreme, a very large size will
lend a shifting, diffused delay effect to the reverb. The other extreme a very small value
will give it a highly colored, metallic feel.
The Stereo Image control determines the width of the output's stereo image. At the highest
setting of 120 degrees, each ear receives a reverberant channel that is independent of the
other (this is also a property of the diffusion in real rooms). The lowest setting mixes the
output signal to mono.
20.19.4
Diffusion Network
The Diffusion network creates the reverberant tail that follows the early re ections. The
decay time control adjusts the time required for this tail to drop to 1/1000th (-60 dB) of its
initial amplitude.
High and low shelving lters provide frequency-dependent reverberation decay. The highfrequency decay models the absorption of sound energy due to air, walls and other materials
in the room (people, carpeting and so forth). The low shelf provides a thinner decay. Each
lter may be turned off to save CPU consumption.
The Freeze control freezes the diffuse response of the input sound. When on, the reverberation will sustain almost endlessly. Cut modi es Freeze by preventing the input signal from
adding to the frozen reverberation; when off, the input signal will contribute to the diffused
amplitude. Flat bypasses the high and low shelf lters when freeze is on. If Flat is off, the
frozen reverberation will lose energy in the attenuated frequency bands, depending on the
state of the high and low shelving lters.
The Echo Density and Scale parameters provide additional control over the diffusion's density and coarseness, and, when the room size is extremely small, have a large impact on the
coloration contributed by the diffusion.
The Chorus section adds a little modulation and motion to the diffusion. Like the Spin
section, you can control the modulation frequency and amplitude, or turn it off.