Lexicon NUVERB - FOR MACINTOSH Manual page 88

Reference
Pre-echoes can best be understood by visualizing a stage where the early reflections are the
sounds emanating from the rear and side stage walls directly after the sound from the stage.
Usually the rear stage wall reflection is earlier and louder than those from the two side walls.
The pre-echoes are actually clusters of echoes, with the density of the cluster set by DIFF.
The pre-echo delay parameters change the perceived locations of reflecting surfaces surround-
ing the source. Level adjusts the loudness of the reflection. For each of the Lvl (Pre-echo level)
parameters, there is a corresponding Dly parameter. Each of these sets the delay time in ms for
one of the pre-echoes. These are not affected by PDLY, so pre-echoes can be placed to occur
before the reverberation starts.
The Dly pre-echo delay parameters have a resolution of 2 milliseconds. (0 - 1000ms)
The Lvl pre-echo level parameters have sixteen steps, calibrated in decibels. (Off - 24dB - Up
Full)
The Fbk feedback parameters (for Delays 3 and 4 only) are adjustable in 6% increments from
-93% to +93%.
DLY1, LVL1 Pre-Echo 1, one second maximum to left channel.
DLY2,LVL2 Pre-Echo 2, one second maximum to right channel.
DLY3, LVL3, FBK3 Pre-Echo 3, 2.8 seconds maximum to left channel, with feedback.
DLY4, LVL4, FBK4 Pre-Echo 4, 2.8 seconds maximum to right channel, with feedback.
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