UAD Powered Plug-Ins Manual - 120 - Chapter 10: EMT 250 Electronic Reverberator
Important: In Delay mode, lever 3 does not control a “real” parameter; it
is only used to select the active channel for other parameters in the graphical
user interface. For this reason, the parameter is not exposed for external con-
trol surfaces or automation, nor is it saved in sessions or presets.
Predelay (Lever 4)
Lever 4 can be used as a common predelay to both channels (the predelay
time is added to the delay times of both channels). See “Lever 4 Predelay” on
page 115 for more information.
Front/Rear
In Delay mode, the Front/Rear Outputs switch is not illuminated (the sound is
identical in both pairs of outputs). When moved to the Rear position, the
plug-in output is summed to mono. See “Front/Rear Outputs” on page 115
for more information.
Phase Phase program mode creates a comb filter curve that results from the addition
and subtraction of two signals with a small time shift between them. The comb
filter changes the amplitude of the source signal's harmonic overtones, result-
ing in interesting tonal variations.
Tip: Phasing is most apparent when the plug-in is set to 100% wet (or when
Wet Solo (page 125) is active).
In the EMT 250, the input is fed to two delay processors; one with a fixed de-
lay time of 15ms, and the other which is variable from 0–15ms, controlled by
lever 1. By changing this variable “time shift” the phase (shape) of the comb
filter, and therefore the timbre of the output signal, is changed.
Note: Unlike many “phasors,” the EMT 250 does not modulate the variable
“time shift” with a low frequency oscillator (LFO), which results in the contin-
uously varying “swooshing” effect that is often associated with the process
name. This conventional “phasor effect” can be reproduced (with outstanding
results) by moving lever 1 back and forth, either manually or with automation.
Phase (Lever 1)
In Phase program mode, lever 1 controls the delay time (the phase “time
shift”) between the two signals that create the comb filter. Phase values of 0ms
to 15ms are available, selectable via 16 steps.
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