The Algorithms And Their Parameters; About The Algorithms - Lexicon PCM 90 - REV 1 User Manual

The PCM 90 uses five algorithms to create different types of reverberation
effects. Each of these algorithms and its associated parameters are described
in detail in this section.
When you select any effect, the bank and row label will appear on the upper
display line. The matrix location and the effect name will appear on the lower line.
Press and hold Program Banks or Register Banks to display the algorithm
from which the currently loaded effect is derived. Press Edit to display the last
edited parameter in that algorithm's parameter matrix.
Halls: Orchestral
P0 0.0 Deep Blue
The five PCM 90 algorithms, Random Hall, Ambience, Rich Plate, Concert Hall
and Chamber/Room, share the same general structure, shown below. The
shaded area of the diagram is detailed in the individual effect descriptions that
follow.
The five algorithms share a common set of controls and parameters built around
one of the five stereo reverb effects.
Input levels and hardwired pans determine the signal flow to left and right pairs
of delay voices, and also to the reverb effect. Some delay voices have
individually adjustable level, delay, and feedback controls, as well as master
voice controls. A High Cut parameter provides high end rolloffl. InWidth and
OutWidth controls allow the creation of spatial effects.
In this chapter, diagrams and descriptions of each algorithm are presented first,
along with pictures of each edit matrix. The diagrams are followed by a glossary
of parameter descriptions, organized alphabetically by matrix row name. Within
each matrix row, parameters are organized as far as possible in the sequence
in which they appear in the row.
Press Edit to access the
parameter matrix.

The Algorithms and Their Parameters

The Algorithms and
Their Parameters

About the Algorithms

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