Reference Manual

350 Live Audio Effect Reference
Spin applies modulation to the early reflections. The X-Y control accesses the depth and fre-
quency of these modulations. A larger depth tends to provide a less-colored (more spectrally
neutral) late diffusion response. If the modulation frequency is too high, doppler frequency shift-
ing of the source sound will occur, along with surreal panning effects. Spin may be turned off,
using the associated switch, for modest CPU savings.
22.28.3 Global Settings
The Quality chooser controls the tradeoff between reverb quality and performance. ”Eco” uses
minimal CPU resources, while ”High” delivers the richest reverberation.
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.
22.28.4 Diffusion Network
The Diffusion network creates the reverberant tail that follows the early reflections. The decay
time control adjusts the time required for this tail to drop to 1/1000th (-60 dB) of its initial ampli-
tude.
High and low shelving filters 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 filter
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 modifies 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 filters 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 filters.