UAD Powered Plug-Ins Manual - 168 - Chapter 17: Lexicon 224
Treble Decay Treble Decay sets a frequency above which decay is very rapid. Lower values
will produce a “darker” reverb with less high frequency content. If Treble De-
cay is set very low, then adjusting Bass, Mid, and Crossover may have little
to no audible effect. The available range is 100 Hz to 10.9 kHz.
Tip: Treble Decay adjusts the AMOUNT of reverb tail highs, while Mid ad-
justs the TIME.
Depth Depth sets the apparent distance between a source and its reverb, much like
the positioning of microphones in an echo chamber. As the value is in-
creased, the apparent distance from the source increases. The available
range is 0 – 71, with zero being “close” and 71 being “far” (the numbers are
arbitrary). The default value is program dependent.
Note: Depth is not available in P9 Chorus A. In this program the display is
not updated when the Depth slider is moved.
Diffusion In most programs, Diffusion affects how quickly the
echo density in the reverb builds up over time. In the
original hardware, this parameter was usually referred
to as “Shift-Depth” (changing the diffusion value re-
quired holding down the shift button while adjusting the
depth amount).
Click the left (“<“) decrement button to decrease the Diffusion value; click the
right (“>”) increment button to increase the value. The available range is 0 –
63 (the numbers are arbitrary). The default value is program dependent;
Table 15 on page 178 lists the default values for each program.
Note: Diffusion is unavailable in P4 Acoustic Chamber.
Zero is the least dense setting. Density increases as the Diffusion value is in-
creased, but setting Diffusion higher than 40 can actually sound less dense.
The fastest density buildup is achieved with Diffusion values near the middle
of the range (approximately 32-37).
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