Lexicon MPX 500 V2 - UPGRADE Installation Instructions Manual page 17

Diffusion Controls the degree to which initial echo density increases over time. High settings of Diffusion
result in high initial buildup of echo density. (Echo density is also affected by Size, with
smaller spaces sounding denser.)
Size Sets the rate of echo density buildup after the initial period (which is controlled by Diffusion).
It also acts as a master control for Decay. Size changes a reverb sound from very small to very
large. Generally, Size control should be set to approximately the size of the acoustic space
being created before other controls are adjusted. The size in meters is roughly equal to the
longest dimension of the space. (Adjusting Size causes the program to re-load.)
Attack Controls the sharpness of the initial response to an input signal. High settings cause an
explosive sound, while low settings cause the sound to increase more slowly with time. Attack
affects the level of sound only within the first 50ms or so.
Level Determines the amount of Wet signal present in output. It functions similar to the Mix control
except it affects only the Wet component.
overall output of two or more programs when Mix is set to Wet.
EkoDly L, EkoDly R Control the timing of single reflections that occur early in the Decay in the reverb (Plate, Hall,
Chamber, etc.) programs. These reflections simulate the sound resonating off the back wall
of a stage or other reflective surface
EkoFbk L, EkoFbk R Control the amount of repeating echo that simulates a flutter echo between parallel walls in
the reverb programs. The range of these parameters is -100% to 100%, with negative values
producing a polarity reversal. High values can cause signal overload.
MPX 500 Version 2 Software Release Notes
It is generally used to balance the
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