Page 1
DTT 3500 Digital
User Guide
On-line Version
Page 2
Safety & Regulatory Information
The following sections contain notices for various countries:
Notice for the USA
FCC Part 15:
to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruct ions, may cause harmful
interference to radio communications. However, this
notice is not a guarantee that interference will not occur
in a particular installation. If this equipment does cause
harmful interference to radio or television recepti on,
which can be determined by turning the equipment off
and on, the user is encouraged to try one or more of the
following measures:
CAUTION:
digital device, pursuant to Part 15 of the FCC Rules, this
device must be installed with computer equipment
certified to comply with the Class B limits.
All cables used to connect the computer and peripherals
must be shielded and grounded. Operation with noncertified computers or non-shielded cables may result in
interference to radio or television reception.
This equipment has been tested and found
•
Reorient or relocate the receiving antenna.
•
Increase the distance between the equipment and
receiver.
•
Connect the equipment to an outlet on a c ircuit
different from that to which the receiver is
connected.
•
Consult the dealer or an experienced radio/ TV
technician.
To comply with the limits for the Class B
Modifications
Any changes or modifications not expressly approved by
the grantee of this device could void the user’s authority
to operate the device.
Notice for Canada
This apparatus complies with the Class B limits for radio
interference as specified in the Canadian Department of
Communications Radio Interf erence Regulations .
Cet appareil est conforme aux normes de CLASSE “B”
d’interference radio tel que spe’cifie’ par le Ministère
Canadien des Communications dans les règlements
d’interfèrence radio.
Declaration of Conformity
According to the FCC96 208 and ET95-19
Name:
Address:
declares under its sole responsibility that the product
Trade Name:
Model Number:
has been tested according to the FCC / CISPR22/85
requirement for Class B devices and found compliant
with the following standards:
EMI/ EMC: ANSI C63.4 1992, FCC Part 15 Subpart B
Complies with Canadian ICES-003 Class B.
This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference,
and
2. This device must accept any interference received,
including interference that may cause undesirable
operation.
Ce matériel est conforme à la section 15 des régles FCC.
Son fonctionnement est so umis au x deux conditions
suivantes:
1. Le matériel ne peut étre source d’interférences et
2. Doit accepter toutes les interférences reques, Y
compris celles pouvant provoquer un
fonctionnement indésirable.
Compliance Manager
Creative Labs, Inc.
August 10, 2000
Creative Labs Inc.
1901 McCarthy Boulevard
Milpitas, CA. 95035
United Stat es
Tel: (408) 428-6600
Creative Labs/
Cambridge SoundWorks
CSW3600
Compliance
This product conforms to the following Council Directi ve:
•
Directive 89/ 336/ EEC, 92/ 31/ EEC (EMC), 73/ 23/
EEC (LVD)
WAR NI NG :
To prevent fire or
shock hazard, do not expose this
appliance to rain or moisture.
The serial number for the
the Decoder Amplifier. Please write this number down
and keep it in a secure area. This is for your security.
Important Notice
DTT3500 Digital
is located on
-2
Page 3
IMPORTANT SAFETY INSTRUCTIONS
READ INSTRUCTIONS – All safety and
operating instructions should be read
before the product is operated.
RETAIN INSTRUCTIONS – The safety and
operating instructions should be retained
for future reference.
HEED WARNINGS – All warnings on the
product and in the operating instructions
should be adhered to.
FOLLOW INSTRUCTIONS – All operating
and use instructions should be followed.
CLEANING – Unplug this product from the
wall outlet or other power source before
cleaning. Do not use liquid cleaners or aerosol
cleaners. Use a damp cloth for cleaning.
ATTACH MENTS – Do not use attachments
not recommended by Cambridge
SoundWorks as they may cause hazards.
WATER AND MOISTURE – Do not use this
product near water; for example, near a
bath tub, wash bowl, kitchen sink, or
laundry tub; in a wet basement; or near a
swimming pool; and the like.
ACCESSORIES – Do not place this product
on an unstable cart, stand, tripod, bracket,
or table. The product may fall, causing
serious injury to a person, and serious
damage to the product. Use only with a
cart, stand, tripod, bracket, or table
recommended by Cambridge SoundWorks,
or sold with the product. Any mounting of
the product should follow the
manufacturer’s instructions, and should
use a mounting accessory recommended by
Cambridge SoundWorks.
VENTILATION – Slots and openings in the
cabinet are provided for ventilation, to
ensure reliable operation of the product and
to prevent it from overheating. These
openings must not be blocked or covered.
The openings should never be blocked by
placing the product on a bed, sofa, rug, or
other similar surface. This product should
not be placed in a built-in installation such
as a bookcase or rack unless proper
ventilation is provided or Cambridge
SoundWorks’ instructions have been
adhered to.
HEAT – This product should be situated
away from heat sources such as radiators,
heat registers, stoves, and other products
(including amplifiers) that produce heat.
POWER SOURCES – This product should be
operated only from the type of power source
indicated on the marking label. If you are
not sure of the type of power supply to your
home, consult your product dealer or local
power company. For products intended to
operate from battery power or other
sources, refer to the operating instructions.
POLARIZATION – This product may be
equipped with a polarized alternatingcurrent line plug (a plug having one blade
wider than the other). This plug will fit into
the power outlet only one way. This is a
safety feature. If you are unable to insert
the plug fully into the outlet, try reversing
the plug. If the plug should still fail to fit,
contact your electrician to replace your
obsolete outlet. Do not defeat the safety
purpose of the polarized plug.
POWER-CORD PROTECTION – Pow er-
supply cords should be routed so that they
are not likely to be walked on or pinched by
items placed upon or against them, paying
particular attention to cords at plugs,
convenience receptacles, and the point
where they exit from the product.
LIGHTNING – For added protection for this
product during a lightning storm, or when
it is left unattended and unused for long
periods of time, unplug it from the wall
outlet. This will prevent damage to the
product due to lightning and power-line
surges.
OVERL OADING – Do not overload wall
outlets, extension cords, or integral
convenience receptacles as this can result
in a risk of fire or electric shock.
OBJECT AND LIQUID ENTRY – Never push
objects of any kind into this product
through openings as they may touch
dangerous voltage points or short out parts
that could result in a fire or electric shock.
Never spill liquid of any kind on the
product.
SERVICING – Do not attempt to service this
product yourself, as opening or removing
covers may expose you to dangerous
voltage or other hazards. Refer all servicing
to qualified service personnel.
DAMAGE REQUIRING SERVICE – Unplug
this product from the wall outlet or other
power source and refer servicing to
qualified service personnel under the
following conditions:
a) When the power-supply cord or plug is
damaged.
b) If liquid has been spilled into, or objects
have fallen onto the product.
c) If the product has been exposed to rain
or water.
d) If the product does not operate normally
by following the operating instructions;
or exhibits a distinct change in
performance.
e) If the product has been dropped or
damaged in any way.
REPLACEMENT PARTS – When
replacement parts are required, be sure the
service technician has used replacement
parts specified by Cambridge SoundWorks
or have the same characteristics as the
original parts. Unauthorized substitutions
may result in fire, electric shock, or other
hazards.
SAFETY CHECK – Upon completion of any
service or repairs to this product, ask the
service technician to perform safety checks
to determine that the product is in proper
operating condition.
WALL OR CEILING MOUNTING – The
product should be mounted to a wall or
ceiling only as recommended by Cambridge
Soundworks.
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Page 4
Contents
DTT3500 Digital
Introduction
Inventory ............................................................................................................ 2
Recommended Signal Sources........................................................................... 2
Installation Sequence......................................................................................... 3
Speaker System Connections ............................................................................. 3
Speaker System Connection Diagram................................................................ 4
Signal Source Connections................................................................................. 5
Signal Source Connection Diagram.................................................................... 6
Speaker Cable and Stand Installation................................................................ 7
Mounting Speakers ............................................................................................ 8
Speaker Placement ............................................................................................. 9
Decoder Amplifier Placement ........................................................................... 12
Decoder Amplifier Functions............................................................................ 13
Surround Reference.......................................................................................... 15
Multiple Connections........................................................................................17
Applications Guide ........................................................................................... 18
Playback Levels ................................................................................................ 21
Specifications.................................................................................................... 21
EAX................................................................................................................... 21
1-Year Limited Warranty..................................................................................22
Technical Support............................................................................................. 22
......................................................................................................... 1
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Page 5
®
®
Introduction
hank you for purchasing
DTT3500 Digital
SoundWorks.
T
lets you experience the full potential
®
of Dolby Digital multichannel sound
from your DVD player or game
console, with a dynamic output that
rivals a component home theater
system. It processes both Dolby
Digital and Dolby Surround program
material.
DTT3500 Digital
OPTICAL connection to enhance the
connectivity and usability to any
devices with OPTICAL output.
DTT3500 Digital
DIGITAL DIN input which supports
discrete 5.1-channel output.
DTT3500 Digital
channel discrete audio support for
Microsoft DirectSound 3D and its
other derivatives. In some of today’s
best CD-based action games,
DTT3500 Digital
Dolby Digital cut-scenes while
offering enveloping positional multi-
by Cambridge
DTT3500 Digital
includes an
also includes a
offers up to 6-
can decode the
channel audio. It’s ready for the new
era of DVD-based games.
Also included is Creative Multi
Speaker Surround (CMSS), which lets
you hear all of your favorite stereo
program material with a new and
exciting three-dimensional quality.
DTT3500 Digital
with an I.R. Remote Control,
providing wireless control over a
variety of audio functions.
The Memory Retention feature of
DTT3500 Digital
the
remembers the last used user settings
in standby mode.
comes equipped
system
Cambridge SoundWorks
1–800–FOR–HIFI
(1–800–367–4434),
8:00
A.M
. – 12 Midnight,
Eastern time
P.M
. – 4:00 A.M.
1:00
Greenwich Mean Time
Outside US:
Tel: 61 7–332–5936
Fax: 617–527–3194
www.cambridgesoundworks.com
or e-mail us at
info@cambridgesoundworks.com
1
Page 6
Inventory
Examine each unit carefully for
shipping damage. If there is any, do not
install or use the system. For advice, call
the store where you made your purchase
or call Creative Technology Ltd.
technical support. Save the shipping
carton and inserts in case you have to
transport the system later. All of the
items shown in the illustration below
should be included with your system. If
anything is missing, notify the retailer.
Recommended Signal Sources
The
DTT3500 Digital
signal source inputs, both analog and
digital. For example:
1. DVD players with Dolby Digital
(AC-3) optical outputs. DVD
players with coaxial outputs (for
example, the Creative labs PCDVD Encore) may also be used.
2. Sound cards that support
DirectSound
supports many
®
3D sound
processing, including front and
rear 2-channel minijack line
outputs (like Sound Blaster Live!
series or Creative Labs Sound
Blaster PCI series).
Sound Blaster Live! owners
should utilize the exclusive
Digital DIN connection to hear the
clearest digital audio available.
3. Conventional 2-channel sound
cards such as Sound Blaster 16 or
the Sound Blaster AWE series can
also be used with the
Digital
.
4. Game consoles like the
PlayStation 2
or Analog Line In connections.
Minijack to DIN Cable
DTT3500
TM
using the Optical
Subwoofer
Center Speaker
Satellites (4)
Decoder Amplifier
Remote Control
“AA”- Size Battery (2)
15V 4A DC
Power A dapter
Feet (6)
Frames (2)
Support
Extends (18)
Supports (6)
Holder/Cap (2)
Monitor Stand
(for Center Speaker)
Desktop Stand
(for Center Speaker)
Desktop Stand (4)
(for Satellites)
Screw
(for Center Speaker Stands)
Strips of Rubber Feet (2)
Screws and Plastic Anchors (2)
Identification Labels
3m Speaker Cable (4)
5m Speaker Cable (2)
Optical Cable
Dual Female-to-Female
RCA Adapter
SPDIF Cable (RCA to RCA)
Stereo to Dual RCA Cable
Tandem Audio Cable
SPDIF DIN Cable
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Installation Sequence
Speaker System Connections
1. Read all of the instructions before
installing the speaker system.
2. Attach the provided stand to the
Decoder Amplifier if you wish to
place the unit vertically. For more
details see “Decoder Amplifier
Placement” on page 12.
3. Connect the Satellites, Center
Speaker, and Subwoofer to the
Decoder Amplifier.
4. Connect the Dolby Digital output
of your digital program source to
the coaxial and/or optical Dolby
Digital input of the Decoder
Amplifier.
5. Connect your normal audio signal
sources via the Analog Line In
inputs. An owner of a Sound
Blaster Live! sound card with a
Digital DIN output should use the
supplied cable to connect it to the
Digital DIN input instead.
6. Using the placement instructions
as a guide, position the Satellites,
the Center Speaker and
Subwoofer. Install the Desktop
Stands and Floor Stands as
appropriate. If you wish to
substitute a powered subwoofer
for the subwoofer that comes
DTT3500 Digital
with
“Substituting a powered
subwoofer” on page 11.
7. Connect the Power Adapter to the
Decoder Amplifier.
8. Turn on the power. Use the TEST
function on the Remote Control to
position and balance the
speakers.
9. You may wish to experiment with
speaker placement briefly before
concealing the connecting cables
and making the installation more
permanent.
10. The unit is ready for you to enjoy.
, read
Speaker Connections
Insert one satellite’s plug into the
corresponding Speaker Output on the
Decoder Amplifier. Repeat this
process for the remaining satellites,
center speaker and subwoofer. For
more details see “Speaker Cable and
Stand Installation” on page 7.
If substituting a powered
subwoofer, connect it to the
Subwoofer Line Out. For more details
see “Substituting a powered
subwoofer” on page 11.
Power Adapter Connections
Insert the small DC connector into the
15V DC IN
Decoder Amplifier. Insert the Power
Adapter’s AC plug into an appropriate
receptacle.
Note:
standby mode before unplugging or
turning off the power supply.
jack on the back of the
Set the Decoder Amplifier to
3
Page 8
Speaker System Connection Diagram
Front Right Satellite
Rear Right Satellite
Subwoofer
Center Speaker
Front Left Satellite
Rear Left Satellite
Power Adapt er
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Page 9
Signal Source Connections
Dolby Digital source
Connect the Dolby Digital/SPDIF
output of your signal source to the
Decoder Amplifier’s Dolby Digital (AC-
3) / PCM Audio Inputs
OPTICAL
(RCA to RCA)
jack using the
or the
COAXIAL or
SPDIF Cable
Optical Cable
.
Game consoles
Connect the optical output of the
game console (e.g. PlayStation2) to
the
OPTICAL
Cable
Use the
and the
Adapter
console’s RCA output through the
multiple A/V plug. Then connect the
miniplug end of the
RCA Cable
Decoder Amplifier.
input with the
.
Stereo to Dual RCA Cable
Dual Fe male-t o -Female RCA
to connect to the game
to the
FRONT
Optical
Stereo to Dual
jack of the
For devices with optical output
Connect the optical output of these
devices (e.g. CD or MD players) to the
OPTICAL
Cable
input with the
.
Optical
For Sound Blaster Live! sound
cards with Digital Out output
Connect the sound card’s Digital Out
output to the
Minijack to DIN Cable
the
SPDIF DIN Cable
Digital DIN
input with
and the
.
For DIN Bracket bundled with
Live! Drive IR
Connect its Digital DIN output to the
DIGITAL DIN
Cable.
DIN
input with the
For all other sound cards
Use the
Tandem Audio Cable
Connect the lime-green stereo
miniplugs to the Line Out minijack
output of your sound card and to the
FRONT
minijack input of the Decoder
Amplifier. Connect the black stereo
SPDIF
.
miniplugs to the Rear Out minijack
output of your sound card (if present)
Rear
and to the
Decoder Amplifier.
minijack input of the
5
Page 10
Signal Source Connection Diagram
Dual Female-to-Female RCA
Red
DIGITAL OUT
Game Console
DVD Player
CD Player
MD Player
OR
OR
White
OPTICAL OUTPUT
COAXIAL OUTPUT
Stereo to Dual RCA Cable
SPDIF Cable
(RCA to RCA)
Optical Cable
4-Ch Sound Card Out put
(Eg. Sound Blaster Li ve!)
Tandem Audio Cable
Lime-Green
REAR OUT
Black
Digital Output (Eg. PC-DVD Encore)
LINE OUT
2-Ch Sound Card Out put
Lime-Green
(Eg. Sound Blas ter AWE64)
Black
Digital Output (S ound Blaster 5.1 So und Card)
SPDIF DIN Cable
LINE OUT
Lime-Green
DIGITAL OUT
Minijack to DIN Cable
DIGITAL OUT
Digital Output
(Bundled wi th Live! Drive IR)
6
Page 11
Speaker Cable
and Stand
Installation
Speaker Cable Installation
Typically, the 3 meter (5 feet) Speaker
Cables will connect the front
Satellites and the Center Speaker to
the Decoder Amplifier and the 5 meter
(9 feet) Speaker Cables will connect
the rear Satellites to the Decoder
Amplifier. A panel of twelve selfadhesive labels is provided to identify
each Satellite and Subwoofer and the
opposite end of the cable connected to
a Satellite and Subwoofer.
1. Identify a 3 meter Speaker Cable.
Most often, a Satellite will be
used with a Desktop Stand. In
this case, thread the bare cable
end of a 3 meter Speaker Cable
through the hole in the Desktop
Stand. Connect this end to a
Satellite (as shown in
). Carefully insert the Desktop
A
Stand’s attachment arm into the
socket in the back of the Satellite,
Diagram
taking up any slack in the cable
as required.
2. To use this Satellite in the front
left position, remove the backing
from the small, round “L” label
and apply it to the back of the
Satellite (see
3. Remove the backing from the
remaining, longer “L” label and
wrap it around the opposite end
of the Speaker Cable near the RCA
plug.
4. Place the Satellite in the front left
position.
5. Repeat this process using another
3 meter Speaker Cable for the
front right Satellite, using the “R”
labels.
6. Connect another 3 meter Speaker
Cable to the Center Speaker. Use
the “C” (center) labels. For details
on attaching Center Speaker
stands, see “Center Speaker Stand
Installation” on page 8.
7. Use the RS and LS labels (right
and left surround) and 5 meter
Speaker Cables for the rear
Satellites.
8. If you wish to use the Floor
Stands with the rear Satellites,
Diagram A
).
assemble the stand according to
the
Floor Stand Assembly
leaflet.
9. Use the last 3 meter Speaker
Cable and the “SUB” labels for
the Subwoofer.
Speaker Cable Usage
To connect the Speaker Cable to
each speaker, press one of the
spring-loaded tabs to expose the
connection hole.
Insert the bare end of the cable
into the exposed hole, then release
the tab to lock the cable in place.
Connect cables with red bands to
red tab connectors, and unmarked
wires to black tab connectors.
Notes:
Matching red cables to red
tabs and unmarked cables to black
tabs insures the speakers all play
“in phase”. “Out-of-phase”
connections will do no electrical
harm, but the overall sound quality
will be greatly reduced. You can
substitute regular 18 gauge speaker
cable to create longer cables, if
needed. The 5 meter cables may
also be used for the front satellites
if required.
A
Socket
Attachment Arm
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Page 12
Center Speaker Stand
Installation
Unlike the Desktop Stand (for
Satellites), the stands for the Center
Speaker are of the screw-in type.
1. Align the Attachment Arm to
the Center Speaker (see
Diagram B)
2. Use the screw provided to
connect the Attachment Arm to
the Center Speaker.
.
B
Attachment Arm
Mounting Speakers
Screw Mounting
Mounting the rear satellites on side
walls will give you superior surround
effects.
For a secure installation, mount the
rear satellites only on walls that are
structurally sound.
1. Place the following near you: rear
satellites, screws, plastic anchors
and rubber pads (supplied). You
will also need a drill and hammer.
2. Mark the wall where each rear
satellite screw will be. Position
the speakers behind you and
slightly above ear level.
3. Drill a hole about 2 cm (1 inch)
deep into each wall. Tap a plastic
anchor into the hole until it is
flush with the wall (see
).
C
4. Screw a M5 x 25 mm screw into
each anchor, leaving about
0.5 cm (¼ inch) of the screw
protruding.
5. Apply four rubber pads on the
corners at the back of each rear
Diagram
6. Slip the keyhole of each rear
satellite. The rubber pads will
cushion the satellites from any
vibration and help keep them in
position.
satellite onto a protruding screw
to complete the installation.
C
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Page 13
Speaker Placement
The Front Satellites
The left front and right front
Satellites play stereo music, the offscreen sounds of video playback and
the front channels of 4-channel
games.
These Satellites should be placed to
the sides of your T.V. or monitor. Try
to form an equilateral triangle with
your head and the satellites (see
Diagram D)
line of sight from your listening
position to these Satellites.
. Be sure to have a clear
D
Install the Satellite’s Desktop
Stands when using them on the
desktop, see “Speaker Cable and
Stand Installation” on page 7.
The Center Speaker
The Center Speaker provides the onscreen effects and dialog in Dolby
Digital, Dolby Surround or Creative
Multi Speaker Surround modes. It
should be placed as close to the
center of your T.V. or monitor as
possible.
There are many mounting
possibilities. The Center Speaker can
be placed on top of the T.V or monitor
by using the provided Monitor Stand.
E F
It directs the sound down towards the
listener (see
Use the Center Speaker Desktop
Stand to position a Center Speaker in
front of the T.V. or monitor. It directs
the sound up towards the listener
(see
Diagram E
Diagram F
).
).
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Page 14
The Rear Satellites
The rear Satellites provide the
surround effects in Dolby Digital,
Dolby Surround or Creative Multi
Speaker Surround modes. They also
produce the discrete rear sounds of 4channel sound cards.
5 meters (16 feet) of cable is
provided with the two remaining
Satellites for more flexibility in rear
channel placement. The rear
Satellites may be placed in any
convenient sites alongside the
listener, including sites slightly
forward of the listening location. The
rear Satellites do not have to be at
exactly the same height as the front
Satellites.
If you have side walls close to your
listening position, excellent
placement for the rear Satellites is
slightly behind your listening
position, slightly above ear level (see
Diagram G
hung on the wall using the Screw and
Wall Anchors provided, see
“Mounting Speakers” on page 8.
Any rear Satellite placement to the
left and right side of the listening
position will also provide strong
directional and surround effects.
). The Satellites may be
The rear Satellites may be installed
on their convenient Floor Stands. The
stands should be positioned to the
left and right of your listening
position (see
Diagram H
).
Larger T.V. consoles or desktops can
accommodate both front and
surround pairs of Satellites. Try the
extreme corners of a console or desk
using the Desktop Stands (see
Diagram I
Satellites, use the
the Remote Control to make sure each
speaker can be heard clearly.
).
After you have positioned the rear
TEST
function on
G
H
I
10
Page 15
The Subwoofer
The Subwoofer’s optimum position is
on the floor against the wall. The
closer the Subwoofer is to a corner,
the stronger the maximum bass
output. We strongly recommend
placing the Subwoofer on the floor
Diagram J
(see
(2 inches) of space between the
Subwoofer face and a wall. Position
the Subwoofer so that it’s connection
panel is facing a wall, shielded from
inadvertent contact. The Subwoofer is
not magnetically shielded, so position
it at least 46 cm (18 inches) away
from the T.V. or computer monitor.
). Leave at least 5 cm
Substituting a powered
subwoofer
You may substitute a powered
subwoofer for the subwoofer that
comes with the
Connect its line level input (typically
an RCA jack) to the dedicated
Subwoofer Line Out on the back of
the Decoder Amplifier, using a
shielded audio cable with RCA plugs
on each end. Refer to the powered
subwoofer’s User Manual for
adjustment procedures.
DTT3500 Digital
.
J
11
Page 16
Decoder Amplifier Placement
The Decoder Amplifier can be placed
on the desktop, a shelf or any site
that makes the controls convenient.
The Power Adapter cord must be
able to reach from the Decoder
Amplifier back panel to your AC
power receptacle.
Place the Decoder Amplifier on a
hard, flat surface.
There are ventilation slots on the
Decoder Amplifier’s enclosure. Do not
block these ventilation slots by
placing materials over them.
L
Model Variations
There are two models of the Decoder
Amplifier.
If you have purchased the
horizontal version please ignore the
following sections. Other than the
changeable face plate feature, all
functions remain the same.
The changeable face plate version
is supplied with mylar sheets which
enable you to choose a different
design or orientation (horizontal or
vertical).
M
Decoder Amplifier Stand
If placing the unit vertically, attach
the provided stand to the base of the
Decoder Amplifier (see
Diagram K
).
Face Plate Installation
The face of the front panel may be
changed to reflect a different design
or orientation. Remove the clear
plastic cover and replace the
underlying mylar sheet with
another of your choice, (see
Diagram K
). Replace the cover.
Horizontal Placement
Place the Decoder Amplifier
horizontally if there is adequate
desktop space, (see
Diagram L
Vertical Placement
If your desktop space is limited you
may choose to place the Decoder
Amplifier vertically, (see
Diagram M
K
Mylar Sheet
Front Panel
).
).
Stand
12
Page 17
Decoder Amplifier Functions
The Standby LED lights up when the
Power Adapter is connected to the
mains. Press the Power button to turn
on the Decoder Amplifier.
The CMSS Music LED will remain
illuminated after initial start-up. The
last used CMSS mode’s light will
illuminate for subsequent start-ups
from system standby mode.
The Optical LED also lights up after
initial start-up. The last used Dolby
Digital/PCM Audio input’s light will
illuminate for subsequent start-ups
from system standby mode.
The Digital DIN or Line In LED
lights up, depending on whether
Digital DIN or Analog Line In is
connected. The Digital DIN LED will
blink if a PC connected to the Decoder
Amplifier is off but a Digital DIN
input is connected. Turning on your
PC stops the LED’s blinking.
The indicator light for Dolby Digital
will illuminate automatically if a
Dolby Digital program is playing.
That is, when a Dolby Digital signal
passes through the Decoder’s
processor via the Optical,Coaxial or
Digital DIN (Dolby Digital/PCM Audio)
inputs.
POWER
1.
or standby. When set to “On”, the
Standby LED above the power
button turns off.
:
Sets the system to “On”
2. SUBWOOFER, CENTER AND
SURROUND
adjust the level of the indicated
channels. Their output level
should be balanced with the fixed
output level of the Left and Right
front Satellites.
MASTER
3.
the entire system. The Master
volume knob is servo controlled
via the Remote Control.
CMSS
4.
Speaker Surround)
analog program material.
Repeated presses of this button
step through four different
operation modes.
MOVIE
soundfield appropriate for movie
or game enjoyment from an
analog sound source.
:
These controls
:
Adjusts the volume of
:
CMSS
(Creative Multi
processes
: Creates a 5.1 speaker
2
10
3
1
10
11
4
12
5
6
7
8
9
Legend
Button
LED
13
Page 18
MUSIC
: Creates a 5.1 speaker
soundfield appropriate for music
from any analog sound source.
FOURPOINT/5.1 DIN
mode for DVD games having
Dolby Digital soundtracks with
EAX or Microsoft DirectSound3D
for real-time positioning of sound
effects. Typically a Dolby Digital
5.1-channel + analog signal
source.
If a signal source is connected
to the Analog Line In minijacks,
4.1-channel output is produced.
If the signal source is
connected to the Digital DIN
input, up to 5.1-channel output is
produced. Typically when using a
Sound Blaster Live! 5.1 sound
card or the DIN bracket bundled
with Live! Drive IR. For more
details, see “Signal Source
Connection Diagram” on page 6.
The DIN LED blinks if no signal
or an invalid audio signal like an
AC-3 signal is detected. In the
case of an AC-3 signal, select
Digital DIN at the Dolby Digital/
PCM Audio input selection.
STEREO
you want to hear just stereo
: Use this mode when
: Use this
effects or the stereo Dolby Digital
downmix of a DVD. The Dolby
Surround Pro Logic processor is
disabled in this mode.
DOLBY DIGITAL /PCM AUDIO:
5.
Use this button to select the
signal source input. Repeated
presses of the button cycles
between Optical, Coaxial, Digital
DIN and Off.
6.
MULTI-CHANNEL:
button to select the signal source
input. Repeated presses of the
button cycle between Line In,
Digital DIN and Off.
7.
AUDIO MODE
to play just the left or right
channels of a stereo digital signal
(PCM from an audio CD, a Video
CD or a stereo signal from a DVD).
Use this when, for example, a
Video CD has different languages
on the left and right channels.
Repeated presses of the button
select which channel is fed to
both the Left and Right front
speakers.
LL
-Left channel program is
directed to both Left and Right
front speakers.
Use this
:
Use this button
RR
-Right channel program is
directed to both Left and Right
front speakers. See “Audio Mode
Selection” on page 16 for further
information about this feature.
8. DOLBY PRO LOGIC
button cycles from Dolby Pro
Logic processing of the digital
input to Dolby Pro Logic
processing of the analog input,
then to no Pro Logic processing.
9. DOLBY DIGITAL
turns on whenever a Dolby
Digital signal is detected at the
SPDIF input of the
. For Dolby Digital 5.1
Digital
sound reproduction, make sure
only this light is illuminated.
10.
MUTE
:
the
DTT3500 Digital
button once to mute. The blue
LED on the Master volume knob
blinks and all functions are
operable except speaker test.
Press a second time to restore
audio output. After being muted
for more than thirty minutes, the
Decoder Amplifier goes to
standby mode and the Standby
LED lights up.
:
This
:
This light
DTT3500
Mutes all output from
. Press the
TEST
:
11.
Press this button to start
the “test sound” generator. Use
this test sound to position all the
speakers and to balance their
relative output.
The test sound moves in
sequence from the left Satellite,
the Center Speaker, the right
Satellite, then to the rear right
Satellite, rear left Satellite and
the subwoofer. All indicator lights
will blink on and off while the
test sound generator is in
operation.
The test sound will operate for
three complete cycles and then
stop. You can terminate the
sound at any point by pressing
the Test button again.
First use the test sound to
verify that each speaker is
operating.
Then make sure the speakers
are positioned so that the test
sound can be clearly heard.
Finally, adjust the front panel
level controls for the Center,
Subwoofer and rear Satellites.
Adjust each control so its speaker
achieves a balanced output level
with the left and right satellites
14
Page 19
(which provide a fixed “reference”
output level).
All functions except for the
level controls are disabled while
the test sound is running.
The speaker level controls
operate at all times. If desired,
you may adjust these controls
during program material to finetune the balance.
(This function is only available
on the Remote Control)
Note:
Volume levels during the
test sequence are lower than
during normal operation.
12.
DYNAMIC MODE:
button to experience the full
dynamic range of Dolby Digital
programs. The LEDs on the upper
half of the Decoder Amplifier
light up momentarily. The
program source will sound louder
in Dynamic Mode. If you press
this button again, the default
mode (compressed) resumes. The
LEDs on the lower half of the
Decoder Amplifier light up
momentarily.
Press this
(This function is only available
on the Remote Control)
Surround Reference
Dolby Digital
Dolby Digital (earlier called AC-3)
delivers five discreet full-range
channels (left front, center, right
front, left surround and right
surround) plus a separate Low
Frequency Effects (LFE) channel.
Many soundtracks on the latest
generation laser discs, DVDs and
High Definition Television (HDTV),
are encoded with Dolby Digital
technology.
When a 5.1-channel Dolby Digital
program source is playing, such as
from a Creative PC-DVD player, DVD
player or game console, the Dolby
Digital indicator light will illuminate
automatically.
Note
: Not every section of a DVD
will be 5.1-channel encoded. On
many DVDs, only the main movie
program will be available in 5.1channel sound. Other supporting
chapters (like a “Director’s Comment”
section) may be in stereo or mono.
These sections will not light the
Dolby Digital indicator even though
the sound will be properly reproduced
by the
Dolby Pro Logic
Dolby Surround is an earlier surround
sound standard which is decoded
with a Pro Logic processor in the
DTT3500
steering circuitry derives separate
center and rear channels from
encoded stereo program sources.
convincing movie soundfield when
the material is specifically encoded
for Dolby Surround. Most older stereo
movie soundtracks will only be
encoded for Dolby Surround, even
though the program source may be a
DVD’s digital output. Most DVDs
containing Dolby Surround program
material will cause both the Dolby
Digital and Dolby Pro Logic lights to
illuminate.
decode these digitally transferred
Dolby Surround programs through
the digital Pro Logic decoder
automatically.
DTT3500 Digital
Digital. The Pro Logic
Pro Logic processing provides a
DTT3500 Digital
.
will
15
Page 20
CD-ROMs and CDs with Dolby
Surround encoding will feature the
Dolby Surround logo at the beginning
of the program or on the packaging.
Process these programs by selecting
Analog In using the Dolby Pro Logic
button for input through Analog Line
In.
If using Digital DIN input, ensure
that the Digital DIN on the Dolby
Digital/PCM Audio input is selected.
Then select Digital In using the Dolby
Prologic button.
When Dolby Pro Logic is selected
CMSS is turned off. To turn on CMSS
again, turn off Dolby Pro Logic first.
Do not select a Pro Logic decoding
mode if the program material is not
encoded for Dolby Surround.
Excessive center channel output will
result, and most of the stereo effect
will be lost. Use CMSS “Movie” or
“Music” modes to upmix stereo
programs to a realistic 5.1-channel
sound field.
Creative Multi Speaker
Surround (CMSS)
CMSS is a 2-channel to 5.1-channel
sound processor similar in some
aspects to a Dolby Surround Pro Logic
processor.
The Music mode creates a
convincing 5.1-channel surround
soundfield with typical stereo
sources, whether they are Dolby
Surround-encoded or not. It works
well with Dolby Pro Logic, WAVE, AVI
and MIDI program material. In
essence, CMSS Music mode puts you
“on the stage” for the music’s
performance, surrounding you with
the performers.
In a similar manner, Movie mode
provides the sonic impression of
being front and center at a movie
screening. Dialog and all normally
centered sounds from a stereo
program are heard through the center
speaker. Use this mode whenever a
music program has sounds you want
to blend with on-screen action or
dialog.
Unlike Pro Logic decoding, CMSS
Music, Movie and FourPoint/5.1 DIN
modes are appropriate for use with
multi-coded sources such as DVD
games. In some game titles, the
movie sequences may be encoded in
Dolby Surround but the game
sequences may be in the WAV format.
CMSS Movie mode supports 5.1channel output for .WAV, .AVI, .MIDI
and other audio software formats.
Few, if any of these kinds of formats
are Dolby Surround encoded.
The FourPoint/5.1 DIN mode passes
the four discreet channel audio of 4channel games direct to each satellite
channel. It does not synthesize rear
channel output, so stereo signal in
this mode will play just through the
front two speakers and subwoofer.
STEREO
The
and Right Front speakers and the
subwoofer. It also lets you hear the
stereo downmix from any DVD.
The Dolby Pro Logic processor is
disabled in this mode.
mode plays the Left
Audio Mode Selection
The stereo soundtracks of some
movies on Video CDs (VCD format)
contain different languages. For
example, a 2-channel soundtrack may
contain Mandarin on the right
channel and English on the left
channel. The VCD program literature
should indicate the presence of duallanguage soundtracks. Similarly,
some movies in the DVD format will
contain dual-language soundtracks.
DTT3500 Digital
of these languages and play it
through both the Left and Right
speakers.
If there is no indication of which
channel is which, and you hear two
different language soundtracks
during stereo playback, select the
“LL” and “RR” settings until you find
the language soundtrack you want.
The Audio Mode selection feature
can only be used with the PCM digital
soundtrack of a Video CD or DVD with
a dual soundtrack, not a DVD
encoded with Dolby Digital 5.1 sound
or Dolby Surround-encoded material.
If you have an analog program with
separate left and right channels (the
analog output of a CD ROM, or the
analog stereo output of a “software”
Video CD, for instance), you will have
to use the balance control in your
PC’s audio software to mute the
undesired channel.
lets you select one
16
Page 21
Multiple Connections
The
DTT3500 Digital
configuration possibilities. Typically,
the system can be connected to either a
game console or a PC.
However, the
allows you to connect to both,
forming a hybrid system.
Connecting to a Game Console and a PC
You can connect your game console
and PC to the
system while sharing one monitor by
following the instructions below.
Audio Connection:
1. Connect your game console’s
audio output to the Decoder
Amplifier’s Front minijack input
with the provided Dual Femaleto-Female RCA adapter.
2. Connect your PC’s audio output to
the Decoder Amplifier.
Video Connection:
1. Connect your game console’s
video output to a RF to VGA video
converter box.
system has many
DTT3500 Digital
DTT3500 Digital
2. Connect your video converter’s
output to a VGA switch box.
3. Connect your PC’s VGA output to
the VGA switch box.
4. Connect the PC monitor’s VGA
input socket to the output of the
VGA switch box.
After completing the above
connections you will be able to
choose the display output between
your PC and game console by using
the switch box.
To select the audio output, use the
Dolby Digital/PCM Audio or Multichannel input buttons on the Decoder
Amplifier.
PC
Video Signal
Monitor
VGA switch box
Audio Signal
RF to VGA
converter box
Game Console
Video Signal
DTT3500 Digital
Audio Signal
17
Page 22
Applications Guide
Playing Games:
Playing Multi-format DVD Games
These games have Dolby Digital or
Dolby Pro Logic movie clips mixed
with the actual game sequence. These
DVD games have a mix of Dolby
Digital 5.1 sound (a digital signal at
the SPDIF input) and soundcard
wavetable output (a signal at the
analog input).
PC-DVD Setup
For AC-3 signal source connected to
COAXIAL input:
Select the COAXIAL input using the
DOLBY DIGITAL/PCM AUDIO input
selection button. The Dolby Digital or
Dolby Pro Logic source signal will be
automatically processed.
For multi-channel inputs (FRONT and
REAR ANALOG LINE IN or DIGITAL
DIN):
1. Select LINE IN or DIGITAL DIN
input using the MULTI-CHANNEL
button.
2. Select the FOURPOINT/5.1 DIN
mode using the CMSS button.
For 2-channel sound cards:
1. Select LINE IN input using the
MULTI-CHANNEL button.
2. Select MOVIE or MUSIC mode
using the CMSS button.
Software DVD Player
For so und card’s with analog output
to FRONT and REAR ANALOG LINE IN
or digital output to DIGITAL DIN:
Use the software DVD player to
process all signals into multi-channel
output.
1. Select LINE IN or DIGITAL DIN
using the MULTI-CHANNEL
button.
2. Select FOURPOINT/5.1 DIN mode
using the CMSS button.
Playing Microsoft DirectSound3D or EAX Games
1. Select LINE IN or DIGITAL DIN
input using the MULTI-CHANNEL
button.
2. Under CMSS on your
decoder amplifier, select
Digital
FOURPOINT/5.1 DIN to fully
enjoy up to 5.1-channel gaming
DTT3500
experience from Microsoft
DirectSound3D or Creative EAX
titles.
3. For Sound Blaster Live! users,
enable the multi-channel
configuration on your PC.
Playing Conventional Games
Select MUSIC or MOVIE by pressing
the CMSS button until the LED for
MUSIC or MOVIE mode lights up.
Playing Console Games
1. Select LINE IN input using the
MULTI-CHANNEL button and/or
OPTICAL input using the DOLBY
DIGITAL/PCM AUDIO button.
2. Select MUSIC or MOVIE by
pressing the CMSS button until
the LED for MUSIC or MOVIE
mode lights up.
Playing DVD Movies
Using PC-DVD player on a PC
Select the COAXIAL input using the
DOLBY DIGITAL/PCM AUDIO input
selection button.
Listening to PC-DVD movies with
5.1-channel Dolby Digital sound
Be sure to listen only to the digital
program source. You can do this by:
1. Making sure your PC-DVD
player’s stereo downmix is not
sent to your soundcard. For
example, disconnect any cable
link between the cards, or
2. Muting the CD input of your
computer’s software mixer/
volume control application.
Using software DVD player on a PC
1. Set the software DVD player to
pass through AC-3 to DIGITAL
DIN output.
2. Select DIGITAL DIN using the
DOLBY DIGITAL/PCM AUDIO
input selection button.
18
Page 23
Using set-top DVD player or PlayStation2
Select OPTICAL or COAXIAL using the
DOLBY DIGITAL/PCM AUDIO input
selection button.
For movies with Dolby Digital (AC-
3) soundtracks
This signal is detected automatically
and the DOLBY DIGITAL LED lights
up. You will experience Dolby Digital
5.1-channel output.
For 2-channel movies which are Dolby
Surround-encoded carried within the
Dolby Digital compressed bitstream
The Dolby Pro Logic decoder will
automatically decode the program for
5.1-channel movie experience.
For 2-channel DVD movies which are
Dolby Surround-encoded
The Dolby Pro Logic decoder will
automatically decode the program for
5.1-channel movie experience.
Playing VCD Movies
Using PC-DVD player on PC
Select the COAXIAL input using the
DOLBY DIGITAL/PCM AUDIO input
selection button.
Using SoftMPEG player or PlayCenter on PC
1. Select LINE IN or DIGITAL DIN
input using the MULTI-CHANNEL
button.
2. Select the Movie mode by
pressing the CMSS button until
the LED for Movie mode lights
up.
This mode lets you experience the
surround sound with 5.1-channel
output; all dialog and central
sounds will be heard through the
center speaker, while music and
off-stage sounds are heard
through the other four satellites.
3. If you are using PlayCenter to
play the VCDs, disable all CMSS
effects in your PlayCenter - use
only DTT3500 Digital’s Movie
mode.
Using set-top VCD player
1. Select LINE IN input using the
MULTI-CHANNEL button.
2. Select the Movie mode by
pressing the CMSS button until
the LED for Movie mode lights
up. You can experience surround
sound instead of mono/stereo
sound; all dialog and central
sounds will be heard through the
center speaker, while music and
off-stage sounds are heard
through the other four satellites.
For VCD movies with Dolby Surround-encoded stereo program
Use the Dolby Pro Logic decoder for
5.1-channel movie viewing
experience.
For source connected to OPTICAL/
COAXIAL/DIGITAL DIN:
1. Select OPTCAL/COAXIAL/DIGITAL
DIN input using the DOLBY
DIGITAL/PCM AUDIO button.
2. Press the DOLBY PRO LOGIC
button until the DIGITAL IN LED
lights up.
For source connected to ANALOG
LINE IN:
1. Select LINE IN input using the
MULTI-CHANNEL button.
2. Select ANALOG IN using the
DOLBY PRO LOGIC button.
19
Page 24
CD Audio Music
Enjoying CD Audio on PC
1. Select LINE IN or DIGITAL DIN
input using the MULTI-CHANNEL
button.
2. Select the Music mode by
pressing the CMSS button until
the LED for Music mode lights up.
This mode creates an enveloping
five-speaker surround effect that
enhances stereo music.
Karaoke Music
Singing Karaoke on PC with Sound Blaster Live! only (with Creative PlayCenter)
1. Select LINE IN or DIGITAL DIN
input using the MULTI-CHANNEL
button.
2. Ensure your microphone is
connected to the MIC IN of Sound
Blaster Live!.
3. Enable the Microphone source in
the Mixer.
4. Select one of the seven Karaoke
modes under Environment in
Creative Launcher.
5. Click the Audio Menu button on
the Creative PlayCenter to hear
only the music, i.e. with the vocal
portion masked out.
Singing Karaoke on PC with Sound
Blaster Live! and Creative PC-DVD
Decoder Card (with Creative
Navigator application)
1. Ensure your microphone is
connected to the MIC IN minijack
of Sound Blaster Live!.
2. Enable the Microphone source in
the Mixer.
3. Select one of the seven Karaoke
modes under Environment in
Creative Launcher.
4. Select the COAXIAL input using
the DOLBY DIGITAL/PCM AUDIO
input selection button.
5. Press the AUDIO MODE button of
the
DTT3500 Digital
amplifier unit until you hear only
the music i.e. vocal portion is
masked out.
decoder
20
Page 25
Important! Specifications
EAX
Playback Levels
DTT3500 Digital
individual or small group listening
and can achieve surprisingly high
output levels. However, playing
heavy-bass program material
continuously at overly loud, distorted
levels may blow the system’s internal
fuse.
The fuse can be replaced only by a
qualified representative. To avoid this
inconvenience and a possible nonwarranty repair charge, reduce the
playback volume when the system
shows obvious signs of stress, for
example, when it sounds raspy, fuzzy,
and/or muddy.
is intended for
DTT3500 Digital
6-Channel Amplifier
Satellite speaker:
7 watts RMS per channel
Center Channer amplifier:
21 watts RMS per channel
Subwoofer amplifier:
2
3 watts RMS per channel
These specifications apply to
DTT3500 Digital
supplied 15V 4A DC power adapter.
operating from the
EAX is a collection of powerful,
innovative audio technologies.
Developed by Creative's world-class
audio scientists and built into
groundbreaking Personal Digital
Entertainment (PDE) solutions, EAX
is changing the way you experience
audio.
EAX offers advanced, interactive
audio and high-definition sound to a
new generation of portable audio
appliances, audio applications, and
internet services. Advanced
technologies for incredible, cutting
edge audio are built into powerful
tools. EAX-enabled products let you
shape and customize your audio
experience, and include advanced
audio features for music composition
and sound design.
The DTT3500 Digital is the most
complete 5.1 speaker system for
movies and games. The built-in Dolby
Digital decoder and 24-bit Digital-toAnalog Converter (DAC) delivers a
thrilling, high quality home theater
audio experience. When used with
Sony's PlayStation2™, direct digital
interfacing via the optical connector
is possible, assuring the best possible
DVD audio experience.
Different audio content from games
to movies to music files can be
further enhanced with the advanced
EAX technologies incorporated into
the DTT3500 Digital. "Movie" mode
expands the soundfield across the full
5.1 speaker configuration - great for
enhancing playback of regular stereo
audio soundtracks. In addition, the
"Music" mode provides special
processing to enhance playback of
audio CDs and music files.
21
Page 26
1-Year Limited Warranty
Technical Support
o the original purchaser,
Cambridge SoundWorks, Inc.
T
will warrant the speaker system
to be free of defects in material and
workmanship for a period of
one (1) year from date of purchase.
With respect to defects, Cambridge
SoundWorks will, at its option,
replace the product or repair the
defect in the product with no charge
to the original purchaser for parts or
labor.
This warranty does not extend to any
defect, malfunction or failure caused by
misuse, abuse, accident, faulty hookup,
defective associated equipment or use
of the speaker with equipment for
which it is not intended.
This warranty is valid only when the
speaker is returned to the retailer where
DTT3500 Digital
the
© 2000 Cambridge SoundWorks, Inc. All rights reserved. Cambridge SoundWorks is a registered trademark, and DeskTop Theater is a trademark of Cambridge SoundWorks, Inc., Newton, MA. The Creative logo, Sound
Blaster and the Sound Blaster logo are registered trademarks and EAX, the EAX logo, PC-DVD, CMSS, Live!, and Creative Multi Speaker Surround are trademarks of Creative Technology Ltd. in the United States and/or
other countiries. NOMAD is a registered trademark of Aonix and is used by Creative Technology Ltd., and/or its affiliates under license. The DeskTop Theater 5.1 DTT3500 Digital’s Dolby Digital decoder/amplifier is
manufactured under license from Dolby Laboratories. ‘Dolby’, ‘Dolby Digital’, ‘Pro Logic’, ‘AC-3’ and the double-D symbol are trademarks of Dolby Laboratories, Inc. Confidential unpublished works. Copyright 1992-1997
Dolby Laboratories. All rights reserved. Sony is a registered trademark and PlayStation2 is a trademark of Sony Computer Entertainment Inc. Microsoft and DirectSound are registered trademarks of Microsoft Inc. All
other brands and product names are trademarks or registered trademarks of their respective holders. All specifications are subject to change without prior notice. Actual contents may differ slightly from those pictured.
was purchased.
This is the sole and expressed
warranty. This warranty is in lieu of all
other warranties, expressed or implied,
of merchantability, fitness for purpose
or otherwise. In no event shall
Cambridge SoundWorks be liable for
incidental or consequential damages or
have any liability with respect to
defects other than the obligations set
forth above.
To ensure warranty coverage, it is
incumbent upon the original purchaser
to contact the retailer where the
DTT3500 Digital
inform them of the defect within the
warranty period. The only acceptable
method of establishing warranty status
is a copy of the original proof of
purchase indicating customer’s name
and purchase date.
was purchased and
Inside U.S.A., Canada and
Latin America
Creative Labs Inc.
Technical Support
1523 Cimarron Plaza
Stillwater, OK 74075
Tel: 1 –405–742–6622
Fax 1–405–742–6633
Operating hours (Central Time):
Daily 8:00
To reach Technical Support via the
Internet, visit our web site at
http://www.creativehelp.com
You can reach Customer Service by
phone at
Mon–Fri 8:00
Time).
You can also use our Faxback
service at
A.M
.–12 Midnight
1–800–998–1000
A.M
.–7:00 P.M. (Central
1–405–372–5227
,
.
Inside Asia
Creative Technology Ltd.
Technical Support
31 International Business Park
Creative Resource
Singapore 609921
Tel: 65–895–4100
Fax: 65–569–6640
Operating hours (Singapore Time):
Mon–Fri 9:00
Sat–Sun & Public Holidays closed
To reach Technical Support via the
Internet, visit our web site at
http://www.creative-asia.com/
support
A.M
.–6:00 P.M.
22
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