Lexicon PCM 91, User Manual

Page: 45 / 163

2-23
Basic Operation
With 5 algorithms and 250 preset effects, the PCM 91 gives you a lot to play with
right out of the box. An enormous range of editing control is provided for each
algorithm, with parameters organized into a simple edit matrix. In addition to
providing this powerful sound design capability, the PCM 91 is also designed to
allow you to customize these controls for your day-to-day editing needs, or to
simply use a subset of controls specially designed for each preset.
This section will describe three basic levels of editing, from the simplest "plug
and play" method, through the full edit matrix.
Every preset in the PCM 91 has one or more of its available parameters patched
to the front panel ADJUST knob. This Soft Knob provides the first level of editing
control. Once you have loaded a preset, simply turn ADJUST to alter the effect.
When shipped, the PCM 91 will power up with the first preset (P0 0.0 Deep
Blue) loaded. The following display will appear:
Editing an Effect
Controlling the Soft Knob with a
Foot Pedal
If you have a foot pedal connected to
the PCM 91 rear panel Foot Control-
ler jack, you can use it to control the
soft knob patch. (Note that no MIDI
connections are required to do this.)
To assign a foot pedal control over
the soft knob patches, set both Con-
trol mode 3.5 ADJUST and Control
mode 3.5 Foot Pedal to the same
MIDI Controller. See Chapter 5 MIDI
Operation.
The Soft Knob
P0 0.0 Deep Blue
Halls: Orchestral
Matrix Location
Program Bank ID
Program Name
Bank
Row
Turn ADJUST. The display will change to show the name assigned to the
ADJUST patch, and the current value of the patch. Continue turning ADJUST to
change the value of the patch along its entire range. The range of ADJUST knob
control can be limited in the Custom row of the edit matrix, making it possible,
for example, to have a range of only 0...1, in order to have the ADJUST knob
behave as an Off/On control. Many of the presets have range limits to make them
more convenient to use, and some have text assigned to range values for even
greater clarity. In some of the presets, the changes effected by ADJUST will be
as simple as altering the wet/dry mix. In others, turning ADJUST will affect
multiple parameters over the complete control range of 0-127.
Details on how to create your own ADJUST knob patches are given at the end
of this chapter under Patching.