Lexicon CP-1 PLUS V2.0 Owner's Manual page 32

CP-1 Digital Audio Environment Processor
BASS RT, the low-frequency reverb time, depends on the MID RT and is
expressed as a multiplier. BASS RT can be set to be approximately equal to
MID RT in smaller spaces, while in larger spaces it is 25% higher (as in most
actual halls with acceptably warm subjective frequency balance).
PRE-DELAY increases the delay between the direct sound and the onset of
reverberation. Some pre-delay is inherent in these modes, and the preset
value of 0 is usually a good starting point. Increasing the pre-delay will
make the hall sound larger.
TREBLE rolloff is preset to mimic air absorption in actual spaces, being
more pronounced in the larger ones.
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. Its initial value is zero,
unless you have configured the CP-1 for no side loudspeakers.
LISTENER POS compensates for the relative distances of the two speakers
from the prime listening area. It should be set for the value arrived at in the
Panorama set-up procedure on page 13.
SPEAKER ANGLE compensates for varying distance between your front
speakers. The Speaker Angle can be set to the value reached in the setup
procedure on page 13, but the program may also work well at lower values.
The image expansion is strongest at the one location in the room for which
the program has been calibrated. ( See page 13.) It will diminish somewhat
as you move forward or back from that location, and more rapidly as you
move from side to side.
The procedures for naming a new version of the program (SET PROGRAM
NAME) and storing it in one of the User registers (MEMORIZE PROGRAM)
are described on page 36.
The Modes:
Concert Halls
Bass RT
Pre-Delay
Treble
Speech Detection
Panorama Effect
Listener Position
Speaker Angle
Set Program Name/
Memorize Program
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