Lexicon CP-1 - REV 2.0 User manual

Panorama Ambience
Reverb Surround
CP-1
Digital Audio
Environment
Processor Owner's
Manual

Lexicon
Lexicon Part #070-06619 Rev. 2.0 Printed in the United States of America
After unpacking the CP-1, save all packing materials in case you ever need to ship the unit. Thoroughly inspect
the CP-1 and packing materials for signs of damage. Report any shipment damage to the carrier at once; report
equipment malfunction to your dealer.
Unpacking and Inspection
This triangle, which appears on
your component, alerts you to
the presence of uninsulated,
dangerous voltage inside the
enclosure... voltage that may be
sufficient to constitute a risk of
shock.
CAUTION Thistriangle,whichappearson
your component, alerts you to
importantoperating andmain-
tenance instructions in this ac-
companying literature.
Copyright 1991
All Rights Reserved. Lexicon, Inc., 3 Oak Park, Bedford, MA 01730 USA Telephone: [phone] Fax: [phone]
Acknowledgement
The CP-1 is manufactured under license from Dolby Laboratories Licensing Corporation. Additionally licensed
under one or more of the following patents: U.S. numbers 3,632,886, 3,746,792 and 3,959,590; Canadian numbers
1,004,603 and 1,037,877. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing
Corporation.
Patents are pending on the CP-1
Precautions
This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the
manufacturer's instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the
limitsforaClassBcomputingdeviceinaccordancewiththespecificationsinSubpartJofPart15ofFCCRules,whicharedesignatedtoprovide
reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the
equipment OFF and ON, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient the receiving antenna
Relocate the computer with respect to the receiver
Move the computer away from the receiver
Plug the computer into a different outlet so that the computer and receiver are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find
the following booklet prepared by the Federal Communications Commission helpful:
"How to identify and Resolve Radio/TV Interference Problems."
This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No. 004-000-00345-4.
RISK OF ELECTRIC SHOCK
DO NOT OPEN

Safety Suggestions
Read Instructions Read all safety and operating instruc-
tions before operating the unit.
Retain Instructions Keep the safety and operating instruc-
tions for future reference.
HeedWarnings Adheretoallwarningsontheunitandinthe
operating instructions.
Follow Instructions Follow operating and use instructions.
Heat Keep the unit away from heat sources such as radia-
tors, heat registers, stoves, etc., including amplifiers which
produce heat.
VentilationMakesurethatthelocationorpositionoftheunit
doesnotinterferewithitsproperventilation.Forexample,the
unit should not be situated on a bed, sofa, rug, or similar
surfacethat mayblocktheventilationopenings;or,placedin
acabinetwhichimpedestheflowofairthroughtheventilation
openings.
Wall or Ceiling Mounting Do not mount the unit to a wall or
ceiling except as recommended by the manufacturer.
Power Sources Connect the unit only to a power supply of
thetypedescribedintheoperatinginstructions,orasmarked
on the unit.
Grounding or Polarization* Takeprecautionsnotto defeat
the grounding or polarization of the unit’s power cord.
*Not applicable in Canada.
Power Cord Protection Route power supply cords so that
theyarenotlikelytobewalkedonorpinchedbyitemsplaced
on or against them, paying particular attention to cords at
plugs, convenience receptacles, and the point at which they
exit from the unit.
Nonuse Periods Unplug the power cord of the unit from the
outlet when the unit is to be left unused for a long period of
time.
Water and Moisture Do not use the unit near water — for
example, near a sink, in a wet basement, near a swimming
pool, near an open window, etc.
Objectand liquidentry Donotallowobjectstofallor liquids
to be spilled into the enclosure through openings.
CleaningThe unit shouldbecleanedonly as recommended
by the manufacturer.
ServicingDo notattemptanyservicebeyondthatdescribed
intheoperatinginstructions.Referallotherserviceneedsto
qualified service personnel.
Damage requiring service The unit should be serviced by
qualified service personnel when:
the power supply cord or the plug has been damaged,
objects have fallen, or liquid has been spilled into the
unit,
the unit has been exposed to rain,
the unit does not appear to operate normally or exhibits
a marked change in performance,
the unit has been dropped, or the enclosure damaged.
Outdoor Antenna Grounding If an outside antenna is
connected to the receiver, be sure the antenna system is
grounded so as to provide some protection against voltage
surges and built-up static charges. Section 810 of the Na-
tional Electrical Code, ANSI/NFPA No. 70-1984, provides
informationwithrespect topropergrounding ofthemast and
supporting structure, grounding of the lead-in wire to an
antenna-discharge unit, size of grounding conductors, loca-
tion of antenna-discharge unit, connection to grounding
electrodes, and requirements for the grounding electrode.
See figure below.
Power Lines An outside antenna should be located away
Power Service Grounding
Electrode System
(NEC Art 250, Part H)
Antenna Lead-in
Wire
Antenna Discharge
Unit (NEC Section
810-20)
Grounding Conductors
(NEC Section 810-21)
Ground Clamps
NEC —National Electrical Code
Electric
Service
Equipment
Ground
Clamp
from power lines.

Lexicon

CP-1
Digital Audio
Environment
Processor Owner's
Manual

Lexicon

Table of Contents
CP-1 Digital Audio Environment Processor
1 Controls and Indicators
Introduction 1
The Front Panel 2
The Rear Panel 3
The Remote Control 4
2 Connection and Calibration
Installation 7
Connections to Other Equipment 7
Setting the Main Input
and Output Levels 9
Calibration of the
Panorama Program 11
3 Speaker Set-Up and Configuration 13
4 Using The Programs
To Load, Modify
and Store Programs 19
The Programs:
Panorama 21
Ambience 22
Reverb 24
Surround 26
To Rename and Store
a Register 29
5 Troubleshooting 31
6 Theory and Design 35
7 Specifications 53

Page 1
CP-1 Digital Audio Environment Processor
Introduction
Controls
and
Indicators
1
All of the programs in the Lexicon CP-1 Digital Audio Environment
Processor have a common goal: to draw you, the listener, more deeply into
a musical performance or a film. For music the CP-1 uses unique digital
processing to re-create either the original recording space or a new one of
yourchoosing.ForfilmsitoffersanextremelyaccurateversionofDolbyPro
LogicSurrounddecoding and ourown decoding for monauralfilm sound-
tracks.The increase inimpact ofamusical performanceor filmwhenheard
with the CP-1 is enormous, especially when widely spaced multiple loud-
speakers are provided, but even without additional loudspeakers signifi-
cant gains are made.
To re-create the experience of being at a performance the CP-1 draws on
recent studies of concert-hall acoustics, and applies this research to home
listening rooms. The object is to increase the sideways-moving sound in a
room, thus increasing Spatial Impression, or SI.
The CP-1 increases SI by either extracting it from the original recording,
usingthePanorama orSurroundprograms, orbygenerating anewacoustic
environment with Ambience or Reverb.
When a listener is in the correct spot the Panorama program provides an
almost ideal re-creation of the original recording space. It works by using
digital processing to cancel the crosstalk between the listener's ears, effec-
tivelyspreadingthesoundfrom thetwo frontloudspeakersinawide arcin
front of the listener. With the optional addition of rear speakers, Panorama
can be almost spooky in its realism.
The CP-1 Reverb and Ambience programs provide signals for driving
widely spaced side and rear loudspeakers, directly exciting sideways
sound and heightening the listener impact over a large listening area.
(When there are no side speakers, Panorama is used to increase the side-
ways sound from the main speakers.)
The Ambience and Reverberation programs transform the listening room
into a new acoustic space, letting you choose an environment which
matches your music or your mood. Unlike some previous hall simulators,
theCP-1 providesfullstereoprocessing. TheAmbienceprogramgenerates
the side and rear reflection patterns of idealized rooms and concert halls.
Thelargerspacesaddthetruedepthandrealismofaconcerthalltoclassical
andpopular music,whilethesmallerspaces areidealforjazzand rock.The
Reverberation program is similar, but places more emphasis on rich, dense
reverberant decay than on early reflections. It is especially good for
simulating large, highly reverberant spaces.
For films encoded with Dolby Stereo, Lexicon has incorporated into the
CP-1thefirstcompletelydigitalDolbyProLogicSurrounddecoder,andthe
only one with automatic correction of azimuth and channel-balance errors
(the most common problems in currently available films). The CP-1 also
provides a program for playing music through a Surround speaker set-up
(Stereo Logic), and a program for expanding monaural film sound tracks
(Mono Logic).

Page 2
Lexicon
The Front Panel
Source The SOURCE buttons select one of two identical stereo pairs of audio
inputs. Ordinarily Input I will be connected to the main outputs of your
stereo preamp and the second input will be a spare. In video installations,
Input I will be connected to the main audio outputs of your TV receiver,
VCR or audio/video control center. Input II can then accept the outputs of
a separate system or the audio outputs of a video disc or CD player.
INPUT LEVEL
SOURCE
SOURCE
TAPEMONITOR
PRE POSTTAPE SYSTEM
MUTE EFFECT MUTE POWER
III
DIGITAL AUDIO ENVIRONMENT PROCESSOR CP-1
exicon
The MONITOR button selects SOURCE I/II or TAPE IN. The Tape inputs
are provided to accommodate a recorder if the CP-1 occupies a previously
used tape monitor loop.
Monitor
Controls and
Indicators
OD BY
S URROU
N
D
CG O I
L
L
O
RP
System On/Off.
Theunlabeled LEDto theleftof theSystemMute Indicator lightswhen the
CP-1 detects a signal from the remote control. The SYSTEM MUTE LED
indicatesthat unprocessedaudio isnolongerpassingthrough tothe CP-1's
main outputs. The EFFECT MUTE LED indicates that the CP-1’s processed
audio is no longer passing through to its outputs.
Indicator
Lights
The alphanumeric display shows both the program that is running and its
modifiable parameters. The CP-1 has 24 registers: PRESETs 1-12 are
configured at the factory; those labeled USER 1-12 are available for storage
of programs customized by the user.
Alphanumeric
Display
The INPUT LEVEL control and its display allow you to match the level of
the incoming signal to the CP-1’s digital encoding circuits. When correctly
set, loud passages will light the entire row of green LEDs without flashing
the red ones.
The PRE and POST Tape switch determines whether CP-1 processing if
applied before or after tape output. PRE means that the tape deck gets the
signal unaltered (PRE-processing); POST applies CP-1 processing to the
tape output (POST-processing).To record CP-1 processing onto tape the
CP-1 must be in the two-speaker mode (Configuration 1) with the POST
button engaged.
Tape
Input Level
Power

Page 3
CP-1 Digital Audio Environment Processor
The Rear Panel
Rear and Side
Outputs
Stereo outputs for rear and side power amplifiers, with level adjusting
knobs. The procedure for balancing these outputs (as well as the center
channel and subwoofer) with the main pair begins on page 9.
Main outputs, with level adjustment. Level-setting of these outputs must
precede adjustment of the auxiliary channels.
Theadjustment ofthe subwooferoutput shouldbedoneonlyafterallother
channels are calibrated. (See page 11.)
Main, Center
and Subwoofer
Outputs
Center channel output with level control and button. Push the button in if
you have no center channel; leave it out if a center speaker is connected.
NOTE: Leaving this button out with no center channel will cause the
Surround programs to malfunction.
Center/Out
Phantom/In
Inputs and outputs for an additional audio or video tape deck (audio
portion only) or to replace the monitor loop occupied by the CP-1. Tape Out/In
Two sets of main inputs, selected by the SOURCE I/II buttons. Inputs
Controls and
Indicators
REA
R
SID
E
LEVE
L
L
R
OUTPUTS
TAPE
OUT INPUT
S
MAI
N

Page 4
Lexicon
The Remote Control
The Programs
The REVERB programs, like AMBIENCE, simulate rooms of three sizes
with the aid of side and rear channels. These programs have fewer specific
initial reflections than AMBIENCE but richer and smoother reverberant
decay. REVERB is especially good for simulating large, highly reverberant
spaces.
Reverb
The AMBIENCE programs simulate concert halls of three different sizes,
generating reflections of appropriate directionality, delay and spectral
shape and sending them to the side and rear speakers. The Ambience
programsprovideadjustablerecirculationthroughtheLivenessparameter
but for long reverberation times, use REVERB. Both AMBIENCE and
REVERB are true stereo simulators.
Ambience
Panorama The PANORAMA programs provide enhanced lateral sound (and hence
greater spaciousness and envelopment) for either music or films. This
program can utilize left and right rear channels but is also effective using
onlythetwo front loudspeakers.NORMAL(1) andWIDE(2) differ primar-
ilyintheirinitialEffectLevels. BINAURAL(3)isforplaybackonloudspeak-
ers of recordings made with a dummy head.
MUTE
EFFECT BALANCE VOLUME
BANK
PARAM
PANORAMA
123
AMBIENCE
456
7
REVERB
89
SURROUND
11 1210
NORMAL WIDE BINAURAL
SMALL MEDIUM LARGE
SMALL MEDIUM LARGE
MONO STEREO
EFFECTSYSTEM
B
F
L
R
DOLBYSURROUND
PRO - LOGIC
Controls and
Indicators
OD
D
B
B
Y
Y
S URROU
N
D
C G O I
L
L
O
R P

Page 5
CP-1 Digital Audio Environment Processor
Surround
Controls and
Indicators
*Thefirstpushofeitherofthispairofbuttonsdisplaysthecurrentvalueforfiveseconds;anotherpushduringthattimeincreasesordecreases
the displayed value. Holding the button down for 1 second engages auto-repeat.
SYSTEM MUTE turns off all outputs and lights both SYSTEM and EFFECT
MUTE LEDs. Pushing EFFECT MUTE while in system- mute mode turns
the effects alone back on.
EFFECT MUTE alternately turns off and on all signals added by the CP-1.
Use it to compare the sound with and without CP-1 processing. In TEST
mode EFFECT MUTE clears all user memories. (See page 19.)
Mute
VOLUME: UP and DOWN adjust the level of all channels simultaneously.
It assumes the function of the volume control on your preamp or receiver. Volume*
BALANCE: F and B adjust the levels of the rear speakers relative to the
sides and fronts.
BALANCE: LandR adjusttheleft/rightbalanceofallspeakers:front,sides
and rear. It assumes the function of the balance control on your preamp or
receiver.
EFFECT: UP and DOWN adjust the level of all signals added by the CP-1. Effect*
ThethreePARAMETERbuttonsallowselectionandadjustmentofvariable
parameters within each program. Pushing PARAM displays the current
parameter for five seconds; pushing it again before the display changes
selectsthenextparameter.PressingPARAMUPorDOWNwilldisplayand
adjust the current parameter, whether or not PARAM has been pushed. A
singlepushchangestheparameterbyone unit;holdingthebuttonformore
thanone secondcauses thevaluesto changerapidly inan auto-repeatmode.
PARAM can also put the CP-1 into TEST mode. (See page 19.)
Parameter
The SURROUND programs work with film sound tracks to recreate the
theater experience. MONOLOGIC (10) expands the music and effects on
monaural films into the additional channels while leaving the dialog in the
frontcenter. STEREOLOGIC(11) enhancesmusicwithsurroundspeakers
and also allows the listener to adjust certain parameters for film sound that
arefixedinProgram12. PROLOGIC(12)providesthesamedecodingused
inDolbyStereotheatersystems,usinguptoeightspeakersforfront,center,
side, rear and subwoofer channels.
TheBANKbutton switches betweenthe12 factory-preset programsand12
user registers where customized programs may be stored. The program
numberdoesn't change: ifyou areusingPreset program9, BANK switches
to User program 9 and vice-versa. Holding BANK for a few seconds puts
the CP-1 into Configuration mode, in which the three Parameter buttons
adjust the LCD contrast and select one of the 12 speaker setups illustrated
on page 13.
Bank
Balance*

Page 6
Lexicon
Controls and
Indicators

Page 7
CP-1 Digital Audio Environment Processor
2
Connection
and
Calibration
Installation
• Make sure the remote control receiver, located on the right side of the
front panel, is unobstructed. The remote control must be in line of sight
to this receiver for proper operation. The CP-1 may be placed in a glass-
doored cabinet but smoked glass will make the display hard to read.
• Select a dry, well-ventilated location out of direct sunlight.
• Do not stack the CP-1 directly above heat-producing equipment such as
power amplifiers.
• Avoid placing the CP-1 near unshielded TV or FM antennas. The CP-1
may interfere with some FM tuners if it is placed immediately above or
below them.
• Install two AAA batteries in the CP-1’s remote control.
Precautions
The CP-1 may be installed on a shelf or in a standard 19" equipment rack,
using the optional rack-mounting hardware (Lexicon part #021-06639).
Connect the power cord to a wall outlet or to a switched outlet on the back
of your preamplifier. Observe the following precautions:
Connections to
Other Equipment
VCR
or
CASSETTE DECK
MAIN
OUT
TAPE
OUT/IN
AUDIO
OUT
I
II
TAPE
OUT/IN
REA
R
MAIN
SIDE
PROGRAM EQ
or
DYNAMIC RANGE
PROCESSOR
VCR, TV, VIDEO
CONTROL CENTER
SIDE
AMPS
AUDIO
PREAMP
CP-1
INPUT
S
(SPEAKER
EQ)
REAR
AMPS
MAIN
POWER AMPS
CENTER
AMP
SUBWOOFER
AMP
CENTE
R
SUB
WOOFER
AUDIO or VIDEO
CASSETTE
RECORDER
MAIN OU
T
AUDIO OUT
I
II
TAPE
OUT/IN
REA
R
MAIN
SIDE
VIDEO
DISC
SIDE
AMPS
CD CP-1
INPUT
S
(SPEAKER
EQ)
REAR
AMPS
MAIN
POWER AMPS
CENTER
AMP
SUBWOOFER
AMP
CENTE
R
SUB
WOOFER
Using the CP-1 as an
Audio Preamp
Connections with an
Audio Preamp

Page 8
Lexicon
Connection
and
Calibration
VCR
or
CASSETTE DECK
AUDIO
OUT
I
II
TAPE
OUT/IN
REA
R
MAIN
SIDE
SIDE
AMPS
CP-1
INPUT
S
VCR, TV, VIDEO
CONTROL CENTER
REAR
AMPS
CENTER
AMP
SUBWOOFER
AMP
CENTE
R
SUB
WOOFER
INTEGRATED AMP,
PREAMP or RECEIVER TAPE
IN
TAPE
OUT
Connecting the CP-1
in a Tape Monitor Loop
Connect the main outputs of your audio preamplifier or the preamplifier
output of your receiver to Input I on the CP-1.
Inputs I and II are electrically identical and can be used interchangeably.
TheCP-1willalsoactasaline-levelpreampwiththreeinputs(includingthe
built-in tape monitor loop) if you wish to connect, for example, the audio
outputs from a TV receiver/monitor, a CD player and a VCR directly to it.
Connect the CP-1’s MAIN outputs to your main stereo channels. Connect
any additional amplifier/speaker combinations to the remaining outputs
on the CP-1: SIDE to the side amplifiers, REAR to the rears, CENTER to the
center- channel amplifier and SUB WOOFER to the subwoofer amp.
Locate the button below the SUB potentiometer marked CENTER/OUT,
PHANTOM/IN. Ifyou haveno centerfront speaker,push itin; ifyou have
a center channel, make sure this button is in the out position.
Audio Inputs
Note
Audio Outputs
Ifyouhaveareceiverwithnoexternalaccesstothepreamplifieroutputs(or
you wish to use the tape monitor loop on your preamp), you can use a tape
output or external processor loop to the CP-1. However, any change in the
receiver’svolumecontrol afterthesystem isadjustedwillupsetthebalance
between the main and auxiliary speakers. If you are using this configura-
tion, you should now turn the receiver’s volume control all the way down.
If there was a tape deck previously connected to your receiver's monitor
loop, connect it to the CP-1's tape outputs and inputs.
Note
Turn off ALL audio and video components, including individual power
amplifiers. (Unplug any preamps and power amps that don’t have
switches.) LocatethegaintrimpotentiometersontheCP-1rearpanel;these
are knobsatthetopofthepanel,markedREAR,SIDE,MAIN,CENTERand
SUB. Turn each one all the way down (counterclockwise as viewed from
the back).

Page 9
CP-1 Digital Audio Environment Processor
Connection
and
Calibration
PushtheINPUT I buttononthe front panel. Pushthe MONITOR SOURCE
and TAPE PRE buttons. Turn the INPUT LEVEL knob all the way down
(counterclockwise).
TheCP-1 hasits ownvolumeandbalancecontrols, whichyou willbe using
inplaceoftheonesonyourexistingpreamporreceiver. Setthegainsinyour
main stereo channels for optimum dynamic range as follows.
For best performance, the CP-1 should always be driven to its full Input
Level.
Turn on the CP-1. For the first two seconds the display should read:
LEXICON CP-1, with a software version number and a copyright notice.
For another two seconds there will be a configuration message, then a
programnamewillappear. Whenthepower-uproutineisfinished,aimthe
remotecontrolattheunitandpushtheEFFECTMUTEbutton(bottomrow,
right). Themessage:EFFECTSOUTPUTSOFFwillappearinthedisplayfor
about 4 seconds and the EFFECT MUTE LED on the front panel will light.
Turn on your preamp, choose a signal source and play some loud music (a
heavily compressed FM rock station or heavy-metal CD is ideal). Turn the
preamp’svolumecontrolupaboutthreequartersoftheway. AdjusttheCP-
1’s INPUT LEVEL control until the red level-indicator LEDs at the right of
thedisplayblinkoccasionally,thenreducetheINPUTLEVELuntilonlythe
green LEDs are lit.
Ifthereareaudibledifferencesbetweenthelevelsofthesourceyouusedfor
this calibration procedure and other sources, you may have to readjust the
INPUTLEVELtoaccommodatethem. Wherepossible,trytousetheoutput
level controls on the various sources to equalize levels.
Pushand holdtheVOLUMEDOWNbutton onthe remotecontrol untilthe
bar graph on the display completely disappears and the display reads
SYSTEM VOLUME -64 dB. Turn on the main stereo power amplifier, then
hold the VOLUME UP button until the CP-1’s volume is at -05 dB. If the
back-panel potentiometers are turned all the way down, as they should be,
you will not hear any sound yet. If you hear loud sound as the CP-1’s
volume advances, stop and reset all rear-panel gain potentiometers fully
counterclockwise until they are completely off before proceeding.
With the CP-1’s remote volume at -05 dB, slowly advance the rear- panel
potentiometer for the MAIN OUTPUTS until the sound is as loud as you
will normally play the system. Do not touch the gain on your preamp or
receiver after this adjustment. Use only the CP-1 volume control. (Make
sure that this level is not high enough to cause speaker distortion or
amplifier clipping.)
Front Panel
Adjustments
Setting the
Main Input and
Output Levels
Input Levels
Be sure the Input Level is as high as
possible without flashing red.
Set all output levels to zero; set Vol-
ume UP almost all the way.

Page 10
Lexicon
Connection
and
Calibration
The output level potentiomenters (the small knobs above the output con-
nectors on the CP-1 rear panel) allow you to balance the sound levels of all
thechannelsinyoursystemrelativetoeachother.Themostimportantthing
tokeepinmindwhencalibratingthesystemistokeepthesepotentiometers
set as low as possible. Your normal listening level (not background muzak
level) shouldbe with the system volume (as indicated by the front panel
LCD) set to around -06dB. This keeps the processor at its optimum signal
levels while allowing headroom if you really want to crank it up.
Ifyouareusingonlytwoaudiochannels,leveladjustmentisnowcomplete.
If you have additional channels, use the following procedure to set their
levels to match the main stereo pair.
UsetheVOLUMEDOWNbuttontoreducetheCP-1’sleveltoabout-20dB.
If the EFFECT MUTE LED is on, push EFFECT MUTE to cancel it. Push
program button 12; the display will read: PRESET 12 on the left and
SURROUND PRO LOGIC on the right. Push PARAM four times or until
thedisplayreads:CALIBRATE. PushPARAMUPtoturnonthecalibration
signal.
The sound you hear is a band of noise centered around 1 kHz, being sent in
sequenceto:allchannels,leftsideplusleftfront,center,rightsideplusright
front and rear channel(s). If you have a center speaker, the rear-panel
CENTER/PHANTOM button should be out. Since all levels are down
except for MAIN, you will hear only: both fronts, left only, silence, right
only, silence. If you have no center speaker, the rear-panel button should
beinandyouwillhear:bothfronts,left-only,bothfronts,rightonly,silence.
Now turnontheremainingpoweramplifiersandturnup SIDE,REAR and
CENTER gain until the individual loudness of the sounds reaching your
listeningpositionisthesameandtheall-channelsignalisevenlydistributed
from all speakers. The CALIBRATE ON display will remain for as long as
you use this mode. When the front, center, side and rear channels are
balanced, press PARAM DOWN to turn off the calibration signal.
Finally,if you areusing aseparatelow-frequency channel,usemusic orthe
testsignalofyourchoicetoadjusttheSUBWOOFERgainuntilthelowbass
balancestherestofthespectrum. Thiscompletestheinitialconnectionsand
level adjustments of the CP-1.
Main Output
Set Main Output so system is as
loud as you are ever going to need it.
(Be careful that this level does not
cause speaker distortion or amplifier
clipping.)
Balancing
Additional Channels
1. Select
Pro Logic 2.Push Param to
CALIBRATE
3.Push UP
for ON
Adjust other output levels until all
directions are equally loud.
Output Levels

Page 11
CP-1 Digital Audio Environment Processor
Connection
and
Calibration
PANORAMAworksbycancelingthesoundgoingfromeachspeakertothe
opposite ear. The effectiveness of the program is highly dependent on the
geometryofyourfrontloudspeakers,theroomandyour listeningposition.
The correct timing of the canceling signal varies with the angle between
your main speakers. The SPEAKER ANGLE parameter, displayed in de-
grees, adjusts for wide or narrow speaker spacing. For the two canceling
signalstoarriveat bothearsatthesametimeyoumust becenteredprecisely
between the speakers. The Listener Position parameter (LISTENER POS)
delaysthecorrectionsfromeitherchannel and allowsadjustmentforanoff-
center listening chair or for asymmetrical speaker placement.
The ideal setup for Panorama is an acoustically dead room, with speakers
well away from the walls, and the listener on the center line between the
speakers. The effect is diminished by reflections from nearby surfaces.
Furthermore,ifthelistenerseesthetwospeakersfromdifferentanglestheir
responses will differ. The addition of acoustic absorption (soft furniture,
carpets and drapes) or diffusion (furniture or books that form irregular
surfaces and break up reflections) and time spent shifting speakers and
chair into more precise alignment (use a tape measure rather than relying
on your eyes) will all be rewarded.
Findamonosource,suchasanannounceronFMradioor amonofilm, and
listen for a tightly focused center image of speech or singing. If the image
is off-center, adjust the CP-1's BALANCE control. (The narrower the
monaural image, the better Panorama will work.) Perform the following
setupfromarelaxed,comfortablepositioninyourlisteningchair withyour
head facing the center point between the speakers.
1. Reduce the volume to about -20 dB. If the display reads: PRESET at the
topleft,pushProgrambutton2;ifnot,pushBANK,thenbutton2toload
PRESET PANORAMA WIDE. Push PARAM eight times (until the
display reads: CALIBRATE OFF). Push PARAM UP to turn on the left-
channel calibration signal.
2. The test signal should appear to come from off to your left side, well
beyond the left speaker, with near-total silence in the right ear. Still
facing forward, move your head from side to side until the effect is
strongest. If you can find the sweet spot from the confines of your chair,
go directly to step 4; otherwise perform step 3.
3. PushPARAMonce sothedisplay reads:LISTENERPOS. PushPARAM
UP and DOWN until you hear the strongest effect. Then push PARAM
four times, or until the display reads: CALIBRATE LEFT ONLY.
4. Push PARAM UP until the display reads: CALIBRATE RIGHT ONLY.
Again, shift your head from side to side to find the sweet spot, this time
lookingforthepointwhere thesilencein theleftearisdeepest. Compare
the locations of the two sweet spots from steps 2 and 4. If they coincide,
Calibration of the
Panorama Program
SPEAKER ANGLE is the angle be-
tweenthemainspeakersasseenfrom
thelisteningposition-hereitisabout
60 ° .
60°
Select Panorama; Push PARAM to
display: CALIBRATE; then push
Param UP to: ON LEFT ONLY.
NOISE SILENCE
}
Move your head from side to side to
find the position where the noise is
fullleft,and the right earhears noth-
ing.
60°

Page 12
Lexicon
Connection
and
Calibration
go on to step 6; otherwise, perform step 5.
5. PushPARAMtwicesothedisplayreads:SPEAKERANGLE.Ifthesweet
spot from step 2 (LEFT ONLY) is to the left of the sweet spot from step
4 (Right ONLY), push PARAM UP once. If the the step 2 sweet spot is to
the right of the step 4 sweet spot, push PARAM DOWN. Push PARAM
to return to CALIBRATE RIGHT ONLY and go back to step 2.
6. Adjustyourchairsothesinglesweetspotisinthecenter,orusePARAM
to get to LISTENER POS and adjust this parameter to move the sweet
spot towhereyouwantit.UsePARAMtosteptoCALIBRATEandpush
PARAM DOWN until the calibration signal goes off.
The Panorama Program is now calibrated. To store it, see page 27. Use
PARAM to display the final values of LISTENER POS and SPEAKER
ANGLE. Note these values and use them for all forms of Panorama,
including the Panorama subsections of AMBIENCE and REVERB.
NOISE
SILENCE
}
PushPARAM UPagain forRIGHT
ONLY.Ifyour left earis in thesilent
band, the speaker angle is correct.
Repeat for the right side.
If the two silent bands are too close,
raise SPEAKER ANGLE; if too far
apart, lower SPEAKER ANGLE.
To store, see page 29.

Page 13
CP-1 Digital Audio Environment Processor
Speaker
Set-Up and
Configuration
Configuration
Speaker Configurations
3
Press the PARAM UP or DOWN buttons until the contrast of the display is
at a maximum as seen from your listening chair. Then push PARAM to
enter the Configuration menu. Consulting the Speaker Configuration
Chart, push PARAM UP or DOWN until the figure and the description in
the display match your room.
Choose the diagram from the Speaker Configuration Chart that corre-
spondstoyourroomandnoteitsnumber. PresstheBANKbuttonandhold
it for a few seconds. The display will read: LCD CONTRAST ADJ with a
bright bar. The CP-1 is now in Configuration mode. Within this mode,
operations are carried out using only the three PARAM buttons. Configu-
ration mode will be canceled if any other button is pressed or if 10 seconds
pass without a button push.
Subwoofers are not shown in any of these
configurations. Consult the subwoofer
owner'smanualoryour dealer for proper
placement of subwoofers, remembering
that corners are almost always best.
Sideandrearspeakersmaysoundbetterif
mountedabovethelistener,(SeePage15.)
1
Center Phantom
Button IN
3
Center Phantom
Button IN
4
Center Phantom
Button IN
2
Center Phantom
Button IN
5
8
7
10 11 12
Center Phantom
Button IN
9
Center Phantom
Button IN
6
speaker connected to
center output
speakers connected to
Main outputs
speakers connected to
Side outputs
speakers connected to
Rear outputs
Note: If you are using only one rear
speakerit maybehooked upto either
the left or right rear output, as long
asyouusethecorrectConfiguration
number.