Meridian Audio 568 2 User Manual
user guide
Meridian 568.2 Digital Surround Processor
Meridian 568.2 Digital
Surround Processor
User Guide
Preface
i
Sales and service in the UK
Meridian Audio Ltd
Stonehill
Stukeley Meadows
Cambs
PE29 6EX
England
Tel (01480) 445678
Fax (01480) 445686
World Wide Web
http://www.meridian-audio.com
Part no: 568.2/1
Sales and service in the USA
Meridian America Inc
3800 Camp Creek Parkway
Building 2400
Suite 122
Atlanta
GA 30331
Tel (404) 344 7111
Fax (404) 346 7111
Designed and
manufactured in the UK by
Meridian Audio Ltd
Stonehill
Stukeley Meadows
Cambs
PE29 6EX
England
Preface
ii
Copyright © 2002 Meridian Audio Ltd.
Manufactured under license from Dolby
Laboratories Licensing Corporation (Canadian
patent 1,037,877), Lucasfilm Ltd. (US patents
5,043,970; 5,189,703; 5,222,059), Trifield
Productions Ltd, and Nimbus Records Ltd.
Dolby, Pro Logic, AC-3, and the double-D symbol
are trademarks of Dolby Laboratories Licensing
Corporation. Lucasfilm, THX, and THX Cinema are
registered trademarks of Lucasfilm Ltd. DTS is a
registered trademark of Digital Theatre Systems Inc.
MPEG is a registered trademark of the MPEG
organisation. Ambisonic is a registered trademark
of Nimbus Records Ltd. Trifield is a trademark of
Trifield Productions Ltd. LaserDisc is a trademark of
Pioneer Electric Corp. Boothroyd|Stuart Meridian,
Meridian, Meridian Digital Theatre, Meridian
Lossless Packing, and MLP are registered
trademarks of Meridian Audio Ltd.
MHR: This product incorporates copyright
protection technology covered by certain patent
applications and intellectual property of Meridian
Audio Ltd. This technology is provided for the
express purpose of securely containing copyright
audio within the Meridian System only. Reverse
engineering or circumvention of this protection is
strictly prohibited.
This guide was produced by Human-Computer
Interface Ltd, http://www.interface.co.uk
Contents
Introduction 1
Introduces the digital surround processor,
and gives guidelines and suggested
layouts to help you plan your surround
system.
The 568.2 Digital Surround Processor ..... 2
Sample configurations ............................. 5
Specification and accessories ................. 7
DSP presets ............................................. 9
Using the digital
surround processor 13
Provides step-by-step instructions for
operating the digital surround processor,
using either the front panel or the Meridian
System Remote.
Front panel ............................................. 14
Meridian System Remote ...................... 15
Quick guide to operating the 568.2
with the remote ...................................... 16
Selecting a source ................................. 17
Adjusting the volume ............................. 19
Changing the DSP preset ...................... 20
Changing the display ............................. 22
Defining your own
presets 23
Describes how to change the built-in DSP
presets, and create your own presets.
Locking and unlocking the menus ......... 24
Changing the DSP parameters .............. 25
Standard parameters ............................. 26
Changing treble, bass, or phase ............ 27
Changing the listening position ............. 28
Changing the integration of the centre .. 30
Changing the spaciousness of the
sound ..................................................... 31
Changing the lip sync and on-screen
display .................................................... 32
Changing the DSP preset for a source .. 33
Defining your own presets ..................... 34
Preface
iii
DSP presets 37
Gives technical information about each of
the DSP presets, with details of the special
parameters available for each one.
Setting up the digital
surround processor 53
Preface
iv
Logic DSP presets ................................. 38
Music DSP presets ................................ 42
5.1 Movie DSP presets .......................... 47
Multi-channel presets ............................ 51
Describes how to unpack and install the
digital surround processor, and gives
details of the video and audio
connections.
Unpacking .............................................. 54
Positioning the digital surround
processor ............................................... 55
Connecting the digital surround
processor ............................................... 56
Connecting video ................................... 59
Connecting speakers ............................. 60
Connecting sources ............................... 63
Connecting to other Meridian
equipment .............................................. 66
Configuring the digital
surround processor
without a computer 67
Describes how to perform a basic
configuration of the digital surround
processor without requiring a computer.
Choosing a standard setting .................. 68
Standard source settings ....................... 70
Calibrating the system ........................... 71
Calibration tests ..................................... 74
Setting up subwoofers ........................... 78
Configuring the digital
surround processor
using a computer 81
Describes how to configure the digital
surround processor using the Meridian
Configuration program.
Troubleshooting 109
The Meridian Configuration program ..... 82
Installing the Meridian Configuration
program ................................................. 83
Creating a new settings file .................... 86
Setting up speakers ............................... 89
Setting up sources ................................. 94
Configuring presets ............................... 98
Changing the setup options ................. 101
Calibrating the settings with your
system .................................................. 103
Creating a User Type ........................... 105
Completing the configuration .............. 108
Provides suggested solutions to typical
problems.
General operating problems ................ 110
Audio problems .................................... 111
Video problems .................................... 114
Meridian Configuration program
problems .............................................. 115
Service and guarantee ......................... 116
Glossary ............................................... 117
Index .................................................... 121
Preface
v
Preface
vi
Introduction
The Meridian 568.2 Digital Surround Processor combines a completely
digital surround-sound processor with a high-performance digital
preamplifier in a single integrated unit. It takes advantage of the latest
techniques in high-precision analogue electronics and digital signal
processing, and the result is an impressively realistic and exciting
reproduction of music and cinema sound.
The 568.2 Digital Surround Processor accepts both analogue and digital
sources, and supports all the current two-channel and multi-channel audio
formats including PCM, Dolby Digital (AC-3), DTS, and MPEG. It also
supports discrete multi-channel sources, allowing direct connection to
DVD-Audio players such as the Meridian 598.
For instructions on setting up the unit turn to Setting up the digital
surround processor, page 53. Once the digital surround processor has
been set up refer to Using the digital surround processor, page 13, for
information about getting the best results from all your music and film
recordings.
Introduction
1
The 568.2 Digital Surround Processor
Introduction
2
The 568.2 Digital Surround Processor incorporates the result of
many years of research and development by Meridian into
several innovative technologies, including Meridian’s MHR
Smart Link.
MHR Smart Link
The 568.2 Digital Surround Processor can be supplied with an
optional multi-channel input card, which provides a proprietary
multi-channel input called the MHR Smart Link. This is the
recommended way of connecting together a Meridian 568.2
Digital Surround Processor and a Meridian 598 DVD-Audio
Player when used together in a system, allowing the two units to
operate together in a fully integrated way.
The MHR Smart Link transfers six encrypted digital audio
channels directly from the 598 to the 568.2, together with
intelligent stream content information from the source, providing
several significant features and benefits over other methods of
connection.
Upsampling
The 598 can be configured to decode encoded audio streams
internally, and send out digital audio on the MHR Smart Link.
This allows the 568.2 to upsample the audio stream if possible
and process the signals at a higher rate, giving improved audio
performance.
Intelligent stream content information
With a conventional digital connection between a DVD-Audio
player and a digital surround processor, the surround processor
cannot identify whether the source material is music or a movie
soundtrack, requiring the user to manually select an appropriate
DSP preset depending on the type of source material.
The MHR Smart Link carries intelligent stream content
information from the DVD-Audio player, and this includes
information about the source material, such as the encoding on
the disc. The 568.2 can use this information to select a suitable
DSP preset, such as Trifield for two-channel music or PLII Movie
for a two-channel movie soundtrack. The MHR Smart Link even
allows the 568.2 to select the appropriate preset if you change
audio streams within a disc, or play a disc containing several
different types of audio material.
Enhanced source
To use this feature of the MHR Smart Link you simply identify
one multi-channel source as the enhanced source. For this
source you can then specify seven different presets to handle
the alternative types of audio stream. Three of these presets are
for traditionally encoded streams: Dolby Digital, DTS, and
MPEG. The remaining four presets are specifically for the
different types of audio stream available over the MHR Smart
Link.
Multi-channel presets
The 568.2 is provided with two alternative multi-channel presets:
Discrete and Cinema. Discrete is intended for use with music
material. Cinema is a user preset based on Discrete but with
settings more appropriate for movie material.
The 568.2 standard Types set the DVD source as the enhanced
source and assigns presets as shown in the following table:
Stream Description Default preset
Music 2 Two-channel music material Trifield
such as from a CD.
Music 6 Multi-channel music from a Discrete
DVD-Audio disc.
Movie 2 Two-channel audio streams PLII Movie
from a DVD-Video soundtrack.
Movie 6 A decoded multi-channel Cinema
DVD-Video soundtrack.
You can change any of these presets using the Store key; for
more information see Changing the DSP preset for a source,
page 33.
Subwoofer configuration
The intelligent stream content information provided by the MHR
Smart Link also allows the 568.2 to choose an appropriate
subwoofer configuration depending on the stream content: the
Music layout for Music 2 and Music 6 DSP presets, and the 5.1
Movie layout for Movie 2 and Movie 6 DSP presets.
Meridian High Resolution (MHR)
The 568.2 Digital Surround Processor supports Meridian High
Resolution (MHR), to allow you to connect to other MHR-
compliant Meridian products to take advantage of high-rate
audio sources, and provide the additional benefits of lower jitter
and improved sound quality on all sources.
MHR is a proprietary secure encoding format that uses
encryption and anti-copy methods to provide a secure copyright
Introduction
3
protection environment, and allow the secure transfer of audio
streams within a Meridian-only system for playback only.
500 Series communications
The 568.2 Digital Surround Processor is part of the Meridian 500
Series of advanced digital, analogue, and video components,
and these incorporate a sophisticated communications link, to
allow you to control any combination of units using a single
remote, and ensure that they will work together as a fully
integrated system.
The communications system also allows you to extend your hi-fi
system into two or three rooms, with the ability to control the
sources in one room from the controller in another room.
The following pages show two recommended configurations
based on the 568.2 Digital Surround Processor to illustrate the
flexibility of the Meridian 500 Series.
Introduction
4
Sample configurations
Meridian Compact Theatre™
M33 rear M33 rear
598
The Meridian 568.2 Digital Surround Processor is ideal for use
with the M33 Active Analogue Loudspeaker and M1500 Active
Subwoofer. The M33 provides an unusually good response for
such a compact case, and can be mounted either horizontally or
vertically for total flexibility.
M33
M33M33
568.2
M1500
The 568.2 Digital Surround Processor can connect directly to up
to eight Meridian active loudspeakers, allowing you to create a
5.1 or 7.1 analogue theatre ideal for superb music and cinema
sound in the home.
Introduction
5
Meridian Digital Theatre™
DSP6000 DSP6000
DSP5000C
DSP33 sideDSP33 side
Introduction
6
504
598
DSP33 rear DSP33 rear
The 568.2 Digital Surround Processor can be used with two
Meridian DSP6000 Digital Loudspeakers, and a DSP5000C
Digital Centre Loudspeaker, to provide audiophile-quality sound.
A further two or four DSP33 Active Digital Loudspeakers can be
added as side or rear loudspeakers to give extremely convincing
568.2
multi-channel reproduction from music and film sources. The
Meridian 598 DVD Player is an ideal source for use with the
568.2. It allows you to play DVD-Audio, DVD-Video, and audio
CDs, and connects six discrete channels to the 568.2 using
Meridian’s MHR Smart Link.
Specification and accessories
Specification
Digital inputs 4 x cable, 75Ω, IEC958 and data
compatible, up to 24 bits.
1 x optical, Toslink (EIAJ), IEC958 and
data compatible, up to 24 bits.
Analogue inputs 2 x unbalanced, 20kΩ input
impedance.
1 x stereo 24-bit Delta-Sigma ADC.
Optional input 1 x MHR Smart Link connection; see
MHR Smart Link, page 2.
Analogue outputs 4 x stereo 24-bit Delta-Sigma DAC.
8 x unbalanced outputs for centre, sub,
rears, mains, and sides or subs.
3 x balanced outputs for mains and
centre.
Outputs variable between 0 and
3.5Vrms, output impedance 47Ω.
Distortion <0.01%.
Noise and hum <-95dB CCIR.
Digital outputs 4 x stereo SPDIF on cable, 75Ω, up to
24-bit precision.
Tape outputs 1 x digital bypass.
Video circuit 1 x composite video loop with
on-screen display: phono, 75Ω,
1.5V p-p, PAL/NTSC/SECAM.
1 x S-video loop with on-screen
display: Y/C on minidin, 75Ω,
1.5V p-p, PAL/NTSC/SECAM.
Control 2 x Meridian Comms.
9-pin D connector for RS232 PC setup
and control.
Processing 2 x Motorola 56002 running at 66MHz.
2 x Motorola 56367 running at
150MHz.
Introduction
1 x Motorola 56007 running at 82MHz.
Internal precision maintained using
24-bit and 48-bit arithmetic.
7
Dimensions 321mm x 88mm x 332mm
(12.7" x 3.5" x 13.1") (W x H x D).
Weight 5kg (10lb).
Meridian Audio reserves the right to amend product
specifications at any time.
Available accessories
The following accessories are available from your dealer.
Meridian 511 S-patch Box
Meridian 519 Demodulator
To take advantage of Dolby Digital on LaserDisc you need the
Meridian 519 Demodulator, which converts the LaserDisc
RF output to a bitstream which can be fed to the 568.2. The
519 Demodulator automatically senses the presence of a Dolby
Digital signal, and can select the LaserDisc PCM or DTS digital
audio output when no Dolby Digital signal is available.
Fan kit
A Fan kit is available for the 568.2 to provide additional
ventilation if the unit is installed in an enclosed space.
Introduction
8
Provides a convenient way to interconnect the S leads between
up to eight Meridian DSP digital loudspeakers. It is required if
your 568.2 system includes more than two DSP loudspeakers.
Meridian 513 Smart Link patch box
Connects a Smart Link SVGA lead to three phono leads,
allowing the 568.2 to be connected to a Meridian 800 Reference
DVD/CD Player.
The fan can be programmed using the Meridian Configuration
program so that it either runs when the 568.2 is out of standby,
or when the temperature rises above the recommended level.
Rack mount kit
The Meridian 500 Shelf is a tray produced by Middle Atlantic
Products which will allow the 568.2, or any other 500 Series unit,
to be fitted in a standard 19" rack. For more information please
contact Middle Atlantic Products, Inc., Riverdale, NJ 07457,
USA, (001) 973-839-1011, or their local distributor.
DSP presets
The digital surround processor provides an extremely
comprehensive range of digital signal processing options for
decoding both analogue and digital audio signals and
processing them for multi-channel reproduction. These are
referred to as DSP presets, and are designed to provide the best
results with a range of different types of music and film material.
In addition to selecting built-in DSP presets, the digital surround
processor allows you to create your own presets based on the
standard ones. For example, you may want to add more delay to
the rear speakers to create a more spacious sound. You can
store your modified preset with a name of your choice, and
recall it for use at a later date.
This section gives information about each of the built-in DSP
presets, and gives recommendations for the best preset to
choose for different types of material.
Discrete multi-channel sources
Some DVD-Audio discs provide up to six discrete channels, and
when used with a suitable DVD-Audio player such as the
Meridian 598 DVD Player, these channels can be connected
separately to the 568.2 for subsequent processing.
Ambisonics B format
Ambisonics B format contains four independent channels of
information to give a three-axis representation of the sound at
the recording position. The signals are: mono sound pressure,
left-right velocity component, front-back velocity component,
and up-down velocity component.
Multi-channel digital sources
Several alternative multi-channel digital formats are currently
available which encode up to six different channels onto a digital
signal. Three alternatives are currently in use: Dolby Digital, DTS,
and MPEG Surround. However, the 568.2 has been designed so
that it can be upgraded by downloading a software update, to
cater for new formats as they are introduced.
Dolby Digital
Dolby Digital, previously called AC-3, is the preferred sound
format for DVD in NTSC territories, and is widely used on
LaserDisc soundtracks. It is also the audio standard for US
digital television.
Introduction
9
DTS
THX Surround EX and Meridian EZ
Introduction
10
DTS uses an audio compression technique to encode five
channels of audio onto a digital signal. The DTS format is used
to encode multi-channel film soundtracks on LaserDiscs and
DVD-Video discs.
In addition, a high data-rate version of DTS can be used to
compress five channels of CD-quality audio into the same space
as two channels of unencoded sound, allowing a DTS music CD
to provide over an hour of five-channel music.
MPEG Surround
MPEG Surround is the preferred audio format for DVD in PAL
territories, and along with Dolby Digital is a contender as the
standard for music and performance videos on DVD worldwide.
THX
THX versions of Dolby Digital, MPEG Surround, and DTS are
provided to give a better match between the original soundtrack
and typical domestic listening conditions.
THX Surround EX allows 5.1-channel film soundtracks to be
encoded with an extra surround channel to give improved
surround imaging with four surround speakers. Meridian EZ
provides an alternative for THX Surround EX encoded material,
and can also be used to give improved surround imaging with
DTS ES encoded material.
Multi-channel sources encoded onto
two channels
Several systems have been developed for encoding multi-
channel sources onto a standard two-channel analogue signal
so that they can be reproduced by a conventional stereo
system, or decoded with special equipment for multi-channel
reproduction. The 568.2 Digital Surround Processor provides
decoding of the two most important of these, Ambisonic and
Dolby Surround. Although the channel separation cannot be as
good as with the digital multi-channel formats, the 568.2
produces excellent results with these formats.
Pro Logic II
Dolby Pro Logic II is a decoding algorithm designed for two-
channel sources, whether or not they are encoded for Dolby
Surround. It re-creates 5.1 channel movie surround from the
two-channel source, using improved decoding techniques that
preserve the directness of the sound field, resulting in enhanced
image stability compared with standard Pro Logic decoding.
Pro Logic
Pro Logic is Dolby’s original processing mode for decoding
Dolby Surround encoded video and LaserDisc soundtracks, and
films on television. Such materials are usually identified by a
Dolby Surround symbol on the packaging, or displayed on the
film before the programme.
TV Logic
TV Logic provides user-adjustable steering, and is
recommended for use with TV broadcasts that are not surround
encoded, where Pro Logic may give reduced intelligibility.
PLII THX and THX Cinema
PLII THX and THX Cinema enhance Pro Logic II and Pro Logic to
replicate the sound of a dubbing stage or theatre, whether or not
the other equipment in your system is THX approved.
Ambisonics UHJ
Ambisonics UHJ decodes material specifically encoded for
surround sound reproduction, using a two-channel stereo-
compatible encoding. Recordings encoded in UHJ format are
available on CD from several sources including Nimbus Records
and York Ambisonics. Some radio broadcasts are also
broadcast in Ambisonics format.
Conventional stereo sources
The digital surround processor can also accept a conventional
two-channel source, such as music on compact disc or a video
soundtrack, and by analysing the information in the signal
separate the two-channel recording into multiple channels to
give better reproduction and a more stable spatial image.
Four alternative DSP presets are provided for reproducing
material originally designed for a conventional stereo pair of
speakers, and which preset you choose largely depends on your
own personal preferences.
All four presets use similar procedures to extract the surround
component of the original recording, which is delivered to the
rear surround speakers, and side surround speakers if present.
Introduction
11
Music
Special DSP presets
Introduction
12
Music uses a special technique developed by Meridian to divide
the sound between the left, right, and centre speakers and give
a wide, spacious sound. We recommend this option for large-
scale music, such as orchestral and choral music.
Trifield
Trifield uses a different processing technique to give a stable,
three-dimensional image, with the ability to adjust the width of
the image. Because of its precision we recommend this option
for solo, chamber, or vocal music.
Super Stereo
Super Stereo provides a form of Ambisonic decoding suitable for
material that is not specially encoded. We recommend this option
for multi-miked or multi-tracked music, such as rock music.
PLII Music
PLII Music uses the Pro Logic II DSP processing mode to
decode music sources, and provides for user-adjustable
steering to give an exciting sound with many types of music. We
recommend this option for studio-produced music, ie material
not produced using natural soundfield recording.
The digital surround processor also includes the following
special DSP presets, for specific applications:
Mono
The Mono preset is designed for reproducing mono materials
through a centre speaker, so that any high-frequency hiss or
clicks are centrally localised. It is intended for mono recordings,
and multi-language LaserDiscs and video soundtracks.
The Mono preset includes an Academy option, designed to
correct for a high-frequency balance in some old black and
white films, and a Party option, which plays the mono signal
through all loudspeakers.
Stereo and Direct
Stereo and Direct are provided for comparison with the other
DSP presets. Direct uses just the main left and right speakers for
traditional two-speaker stereo reproduction. Stereo, in addition,
uses any subwoofers in the layout to enhance the bass or to
protect small speakers.
Using the digital surround processor
This chapter provides a summary of the functions of the digital surround
processor to identify the controls which you use to operate the unit.
It also provides step-by-step instructions for operating the digital surround
processor, using either the front panel or the Meridian System Remote.
Using the digital surround processor
13
Front panel
BOOTHROYD STUART
Digital Surround Processor
568.2
Display
Digital 65
StoreSource VPreset Mute A Off
2345678
1
Display
1 Source
Selects the source.
2 Store
Changes the DSP preset
assigned to a source.
3 Preset
Changes the preset.
4 Mute
5 Display
Changes the information
displayed on the front panel.
6 V Decrease
Decreases the volume.
7 A Increase
Increases the volume.
8 Off
Switches to standby.
Using the digital surround processor
14
Meridian System Remote
123
CD RADIO LP TV TAPE 1 TAPE 2 CDR CABLE
123
456
789
Function 0 Top Menu
Angle Audio A-B Phase
[ Page
#
4
5 6 7 8 9 10
OSD
Slow/Page ]
EnterReturn
DVD
VCR 1 VCR 2 LD
Repeat
Record
Subtitle
Store
Clear
Menu Volume
Setup
DSP
Display
Band
Off
Mute
1 Source keys
Select a source.
2 Control keys
Control the source functions.
3 Off
Switches to standby.
4 Function
Accesses additional functions.
5 Number keys
For entering track numbers
and radio presets.
6 Top Menu/#
For controlling a DVD Player.
7 Menu keys
For customising the 568.2.
8 Preset
Changes the DSP preset.
9 Display
Changes the front panel
display.
Using the digital surround processor
10 Volume keys/Mute
Change the volume.
15
Quick guide to operating the 568.2 with the remote
Action 568.2 as controller DSP speaker as controller
Source selection CD, RADIO etc. CD, RADIO etc.
Go to standby Off Off
Volume Volume A V Volume A V
Mute Mute Mute
Change display Display Not available
Change DSP preset Preset Preset
Move to next or previous menu Menu < > Function + Menu < >
Change the value of this menu Menu A V Function + Menu A V
Store settings as a new DSP preset Store Function + Store
or over an existing one
Associate the current DSP preset Function + Store Function + Mute
with the current source
Delete an unwanted user preset Clear (held down) Function + Clear (held down)
Using the digital surround processor
16
Selecting a source
When not playing, the digital surround processor should be left
in the standby state. This uses a negligible amount of electricity,
but ensures that the components of the digital surround
processor operate at maximum efficiency from the moment you
start.
If you are not going to use the digital surround processor for
several days you should switch the unit completely off at the
back panel, and disconnect it from the AC power supply.
To switch on from standby
● Press Source (front panel), or select a source by pressing the
appropriate source key on the remote; eg DVD.
If the digital surround processor is part of a Meridian system it
will automatically switch on any other unit in the system, such as
the CD player and Meridian DSP loudspeakers.
To select a source
● Press Source (front panel) until the display shows the source
you require.
For example:
Alternatively press the appropriate source key on the remote;
eg DVD.
After a short delay the display shows the currently selected DSP
preset and volume setting.
For example:
The digital surround processor mutes the sound while you
change source.
By default the following 12 sources are available: CD, Radio, LP,
TV, Tape 1, Tape 2, CDR, Cable, DVD, VCR1, VCR2, and LDisc.
The audio input and DSP preset associated with each source
can be configured using the Meridian Configuration program; for
more information refer to Configuring the digital surround
processor using a computer, page 81.
DVD
Digital 56
Using the digital surround processor
17
To switch to standby
● Press Off on the front panel or the remote.
The display will show:
If you have other Meridian 500 Series equipment or Meridian
DSP loudspeakers connected to the digital surround processor
these units will also switch to standby.
Using the digital surround processor
18
.
Adjusting the volume
The digital surround processor adjusts the volume in precise
steps of 1dB, where 9dB is equivalent to doubling the loudness.
The current volume setting is displayed in dB on the front panel
display, and can be varied in the range 1 to 99dB.
When you first connect power to the digital surround processor
the volume is set to 65, which is similar to the midway position
of the rotary volume control on a conventional preamplifier.
For normal to high-level listening you should expect to use
volume levels in the range 60 to 90.
To change the volume
● Press A or V (front panel), or the red A or V keys on the
remote.
As you adjust the volume setting the display will show the
current volume level.
For example:
Music 70
To mute the sound
● Press Mute.
The display will show:
Mute
To restore the sound
● Press Mute again.
Alternatively, the sound will be restored if you adjust the volume.
Using the digital surround processor
19
Changing the DSP preset
Each source has a set of DSP presets associated with it, one for
each of the alternative audio formats: two-channel (PCM), Dolby
Digital, DTS, MPEG, and discrete Multi-channel.
When you choose a source an appropriate DSP preset is
selected for the incoming audio format.
For example, if you have selected the CD source and are playing
a conventional CD, the Trifield DSP preset will initially be
selected. You may then wish to choose a different DSP preset,
such as Music or Ambisonic.
You can also change the default DSP preset associated with the
source; see Changing the DSP preset for a source, page 33.
The optional multi-channel input card allows you to set up one
source as the enhanced source; see MHR Smart Link, page 2,
for a full description of how it works with DSP presets.
To change the DSP preset
● Press Preset (front panel or remote) to step between the
different DSP presets.
Using the digital surround processor
The display shows the current preset;
for example:
You will be able to choose any of the predefined DSP presets, or
any user-defined presets you have stored.
The following table gives the sequence of DSP presets for each
audio format, followed where appropriate by the abbreviated
name used on the display:
Audio format Presets
Two-channel (PCM) Direct, Music, Trifield, Ambisonics
(Ambsonic), Super Stereo (Super),
Stereo, Music Logic (MuLogic),
Pro Logic (ProLogic), THX Cinema
(THX), Mono, TV Logic, PLII Music
(PL2Music), PLII Movie (PL2Movie),
PLII THX (PL2 THX).
Multi-channel Ambisonics (Ambsonic), Discrete,
Cinema.
Dolby Digital Dolby Digital (Digital),
Dolby Digital THX (Dig THX)
Music
20
Audio format Presets
DTS DTS, DTS THX, DTS Music (DTS Mus)
MPEG MPEG, MPEG THX,
MPEG Music (MPEG Mus)
In each case these will be followed by any user-defined presets
you have stored for the appropriate audio format.
Using the digital surround processor
21
Changing the display
The digital surround processor displays information about the
current settings on the 12-character front panel display. In
addition, it can display the same information superimposed on a
video image. For more information about setting up the
on-screen display refer to Connecting video, page 59.
To change the display
● Press Display.
Each press will step between the following options:
Display option Example
DSP preset and volume
DSP preset and THX gain
Source and volume
Audio stream, number of channels,
and sampling rate.
Using the digital surround processor
22
Blank
Music 65
Music -22
Radio 65
PCM 6-ch 44k
The audio stream display option shows the following three
pieces of information about the audio stream:
AC3 5.1 44k
Format:
PCM 2-channel PCM
AC3 Dolby Digital
DTS DTS encoding
MPG MPEG encoding
MLP MLP encoding
MHR MHR encoding
Input channels:
X.X Main.LFE
2-ch 2-chan. discrete
6-ch 6-chan. discrete
Sample rate:
96k 96kHz
88k 88kHz
48k 48kHz
44k 44kHz
NL Not locked
In addition, the following symbols on the front panel display
indicate which of the DSP processing modes are operating:
Symbol What it means
Dolby processing is operating, or the
source material is Dolby Digital.
THX processing is operating.
Source material is DTS.
MPEG Source material is MPEG.
Defining your own presets
In addition to being able to change the source, volume, and DSP preset,
the digital surround processor provides a sophisticated range of more
advanced adjustments for each DSP preset, to allow you to change the
characteristics of the sound to the settings you want.
This chapter explains how to change these advanced parameters, and
how to store them permanently so they are available whenever you want
to use them.
For information about the parameters specific to individual presets see
DSP presets, page 37.
Defining your own presets
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