User Manual

CHAPTER 21. LIVE AUDIO EFFECT REFERENCE 328
other (this is also a property of the diffusion in real rooms). The lowest setting mixes the
output signal to mono.
21.25.4 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 high-
frequency 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 reverber-
ation 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 den-
sity 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.
21.25.5 Output
At the reverb output, you can adjust the effect's overall Dry/Wet mix, and vary the amplitude
of reections and diffusion with the Reect Level and Diffuse Level controls.