Lexicon CP-1 PLUS V2.0 Owner's Manual page 55

Theory
and
Design
The Surround
Music Surround
Page 50
The requirements for processing sound for film viewing are quite different
than those for music listening. Music demands re-creation of the original
Effect
performance venue, or the evocation of an appropriate setting, as well as the
creation of a believable soundstage. When visual images are introduced, not
only is strong audio imaging necessary to reinforce the illusion that dialog
originates at the screen image, but a diffuse soundfield must be created
which envelops the viewer without distracting attention from the screen.
In addition, films are designed to provide an enveloping experience in
large, reverberant auditoriums where background noise is a significant
consideration, where the screen dominates the field of vision, and where the
sound must be as uniform as possible over a large seating area — in short,
quite a different environment from your living room.
When all of these factors are taken into consideration, it becomes obvious
that no single speaker system, or single method of processing, is optimal, or
even adequate for all types of music as well as for audio/video material.
The CP-1 is able to optimize the listening experience of any material
precisely because it provides such a wide range of processing options. This
flexibility is readily apparent in the variety of Surround modes available to
the user, each optimized for maximizing listener involvement in different
types of material played on a system whose speakers are laid out primarily
for films.
The Music Surround modes in the CP-1 are designed to optimally play
conventional stereo music through any system which includes side or side-
located rear speakers.
Full Range
The Full Range mode is provided simply to allow music to be played over
your entire system. All outputs in this mode are fed a stereo signal except
the monaural (L & R) center speaker.
The left front and left side speakers are driven by the left input signal. The
right front and right side speakers are driven by the right input signal. The
center and rear channels are both driven by the sum of the left and right
inputs. This mode includes a High Pass parameter which allows you to
remove bass from side and rear speakers which might not be able to handle
it. A Center Level control is also provided.
This mode is primarily useful for large audiences, or background music
when entertaining.
Lexicon