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Lexicon PCM 81 - REV 2 - Page 63

Lexicon PCM 81 - REV 2
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3-3
Algorithms and Parameters
PCM 81
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 stu-
dio 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.
L In
R In
InPan
InPan
REVERB
Voice
Dif
V1 Pan
InLvl
InLvl
Delay
V1
V2
V1 LvlV1 Fbk
V2 Pan
V2 LvlV2 Fbk
Delay
V3
V4
V3 LvlV3 Fbk
V4 LvlV4 Fbk
V3 Pan
V4 Pan
PstDly
PstDly
PstDly Mix
Rvb
Width
FX
Mix
FX
Width
Hi
Cut
FX
Adj
Voice
Dif
Rvb In
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.

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