Lexicon CP-1 PLUS V2.0 Owner's Manual page 30

CP-1 Digital Audio Environment Processor
EFFECT LEVEL adjusts the loudness of the side and rear speakers. When
there are no side speakers, it adjusts the amount of ambient signal mixed
into the main loudspeakers. EFFECT LEVEL is the most important user
adjustment in the Concert Halls modes, and has been given its own button
on the remote. It should be adjusted as high as possible without making the
extra speakers individually audible.
ROOM SHAPE selects one of two basic hall shapes. Refer to Chapter 5:
Theory and Design, for a discussion of the properties of the two.
ROOM SIZE allows you to change the room size in fine gradations within
the overall hall size you have selected. For convenience, the hall size is
denoted by length in meters.
The LIVENESS parameter adjusts the amount of recirculation within the
program. The higher the value, the more reflective the surfaces of the
simulated space and the longer the sound will take to decay. At very high
values the decay is audibly less smooth than in the Reverb programs, which
are more effective at simulating very live spaces.
ROLLOFF mimics the high frequency absorption of the air in the hall and
its initial value is therefore more pronounced (the rolloff begins at a lower
frequency) in the larger halls.
The Speech Detection circuit distinguishes monaural speech from other
inputs. Whenever stereo signals are present, the right and left input chan-
nels are used independently as inputs to the ambience synthesis. If there is
a strong monaural speaking voice present at the same time, this component
of the input is reduced while the stereo component is increased. If the input
signal is pure monaural speech the input is almost entirely attenuated.
SPEECH DETECTION is a real benefit to some popular music (where
spoken voice, such as rap, occurs along with music), stereo television, and
early stereo movies. Any stereo material which was not carefully mixed for
Surround is a good candidate for playing through Ambience with SPEECH
DETECTION On.
PANORAMA EFFECT adjusts the strength of the signal used to expand the
stereo image outward from the front two speakers. It is only needed when
side speakers are absent.
LISTENER POS compensates for the relative distance of the two main
speakers from the prime listening area. It should be set for the value arrived
at in the Panorama set-up procedure on page 13.
The Modes:
Concert Halls
Effect Level
Room Shape
Room Size
Liveness
Rolloff
Speech Detection
Panorama Effect
Listener Position
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