Lexicon PCM 80 - Manual (Page 60)

Lexicon
3-2
PCM 80 User Guide
The 4-Voice
Algorithms
The Reverb Shell Each of the 4-Voice algorithms share a common set of controls and parameters
built around one of five stereo reverb effects: Concert Hall, Plate, Chamber,
Inverse and Infinite. The diagram below shows these common controls and
parameters as they are structured around a reverb effect. We call this structure
the Reverb Shell. (Individual reverb effects are described on the following
pages.)
In the 4-Voice algorithms, input levels and pans determine the signal flow to left
and right pairs of delay voices, and also to the reverb effect. Each delay voice
has individually adjustable level, delay, feedback, and pan controls, as well as
master controls for all of the voices. These algorithms can be used to create a
wide variety of stereo delay and modulation effects in parallel with studio quality
stereo reverberation.
The two delays after the reverb effect are referred to as post delays. The PstDly
Mix control determines how much post delay is actually heard. The Rvb Width
control affects only the output of the reverb portion of the effect.
The delays and the output of the reverb effect are summed at the FX Mix control.
This control allows you to blend the relative amounts of delay and reverb.
FX Width controls the spatial characteristics of the composite reverb and delay
effect.
The Hi-Cut parameter provides high end rolloff, while FX Adjust determines the
output volume of the entire processed signal.