• Meridian 565 User Manual Supplement for DTS


  •   
  • FileName: dts_temp.pdf [read-online]
    • Abstract: Meridian 565 User Manual Supplement for DTSIntroduction How to use DTSMeridian have recently released a new hardware The 565 automatically detects DTS if you play a DTS

Download the ebook

Meridian 565 User Manual Supplement for DTS
Introduction How to use DTS
Meridian have recently released a new hardware The 565 automatically detects DTS if you play a DTS
version of the famous 565. The hardware change CD, LaserDisc or DVD.
includes a new Z3 DSP card. When the disc starts playing, the 565 will switch to
The Z3 card runs Version 4.x software, and will add one of its DTS presets.
support for all the audio formats of DVD – including If you subsequently play a different disc (such as a
Dolby Digital (AC-3), DTS, MPEG Audio and 24-bit standard CD or a Dolby Digital LaserDisc), the 565 will
PCM. reload another DSP preset – like Trifield or Dolby
The first release of Version 4 software does not Digital (AC-3).
include MPEG decoding; this will be provided as a Alternatively, you can manually select one of the DTS
maintenance upgrade. presets at any time. (See page 18 of the User guide.)
This sheet supplements your 565 Installation and Please note: if you do deliberately select a DTS preset,
User guides and describes how to use the 565 to play the 565 will only decode DTS and be silent for all other
back DTS material. formats until the preset is changed.
The information in this sheet will be incorporated into
a new 565 User Manual when the MPEG software DSP parameters
upgrade to your 565 is available. Please return the The DSP preset parameters for DTS are the same as
enclosed form to register your Version 4 purchase. We those for Dolby Digital (AC-3), except for ‘Compress’
will send you a final manual in due course. which is not a feature of DTS. (See page 40 of the
User guide.)
Installing 565 for DTS Correct use of the LFE Level control is important with
DTS soundtracks are available on CD, LaserDisc and DTS recordings.
DVD. In each case the encoded DTS stream is It is conventional for decoders to boost the LFE
delivered from the SPDIF cable or optical output of the signal by 10dB for movie reproduction (this is the
player to the 565. There is no need for a demodulator expected setting at the cinema).
for DTS LaserDiscs or for Dolby Digital on DVD. Some DTS music material may not expect the normal
Consequently there is no need to change the way theatrical 10dB boost to the LFE signal. If you find the
your 565 is connected; DTS will be delivered from the sound of some material to be particularly boomy, you
digital output of the CD and DVD players or the optical should turn this parameter down to ‘LFE –10dB’ or use
output of the LaserDisc player directly to the 565, or the DTS CD preset instead, which has a default LFE
562V if one is present. (See page 9 of the 565 level of –10dB.
Installation guide.) When DTS is being decoded, there is an additional
Please note: the digital signal carrying DTS can be display available on the 565 that shows the encoded
safely passed through a Meridian 519 Demodulator if format, like ‘4.0’ or ‘5.1’.
you have one.
The setup procedures for a new 565 are the same as Storing Presets
those outlined in the Installation guide for a 565 AC-3. Once you have customised a DTS preset to your liking,
There is one additional Config parameter, and some you can store and name these settings as a User
Config subtleties – as outlined in this supplement. Preset in the same way as any other DSP preset.
However, there is a very important difference in
New presets functionality: while 565 will allow you to create a DTS
The 565 has three new factory presets for DTS. These preset – it will not assign it to a source as part of the
are: ‘Store’ process. (See page 30 of the User guide.)
If you want to assign a DTS preset to a source, you
• DTS CD – normally used for CDs. This preset will be have to do that in Config. (See page 48 of the
automatically called up by 565 if you play a DTS CD Installation guide.)
and the 565 source is labelled ‘CD’.
• DTS – for DTS movie soundtracks. The default
settings for Version 4.x assign this preset to the LP Why is DTS handled differently?
source. Unfortunately, to understand this we have to delve into
• DTS THX – adding THX processing to DTS movies. some arcane technical issues.
This preset loads automatically when the source is Dolby Digital and MPEG are both ‘flagged’ as non-
‘LD’. audio in the data stream and so devices like 565 or
In keeping with current guidelines from Dolby, the AC-3 digital/analogue converters (DACs) know not to play it
presets are now labelled ‘Digital’ and ‘Dig. THX’. If you as normal audio by mistake. (This same method is
find this confusing, you can label your user presets in a used to prevent you playing back CDROMs as audio in
more helpful way. a CD player.)
If, for any reason, compressed streams are directly
played as audio, the result is a loud hiss.
Like Dolby Digital and MPEG, DTS is a compressed
(non-PCM) signal.
Meridian Audio Limited, Stonehill, Stukeley Meadows, Huntingdon, Cambs, PE18 6ED, England
Tel: +44 1480 434334 Fax: +44 1480 432948 Web: http://www.meridian-audio.com
Meridian 565 User Manual Supplement for DTS
DTS streams on the other hand are not flagged in
this way; consequently normal DACs and decoders
Automatic DTS operation
have no direct method of preventing you hearing the If you want to ignore the short hiss that may occur at
compressed stream as a loud hiss. the start of LaserDiscs, then you can just use the 565
The Meridian 565 detects the DTS signal and as before.
switches to a DTS preset as quickly as it can. However, CDs will always behave well because of the default
even the 565 needs a short time to be sure that this DTS delay.
really is DTS. So, when you play a DTS LaserDisc you If you follow this method, the 565 will load one of its
may hear the compressed signal as a short burst of DTS presets automatically if a DTS signal is detected.
hiss before DTS is identified. As we have explained, The preset that gets loaded depends on how the
this is an unavoidable limitation of the way DTS is source is labelled – as described below:
delivered, not of the 565. • Label is ‘LD’ – loads DTS THX
In Version 4.x software we have provided some very • Label is ‘CD’ – loads DTS CD
useful workarounds, as described in the next four • All others – loads DTS
sections. For example, you can therefore force the 565 to use
DTS CD with the CDR source, by re-labelling it CD as
Pre-loading DTS described on pages 48–49 of the Installation guide.
Manually pre-loading a DTS preset, as described
earlier, avoids the hiss. To further assist, we have set Using a 562V with the new 565
up the LP source to automatically load DTS for There is an upgrade to the 562V software, Version 1.8,
LaserDiscs. So, if LP is selected before playing a DTS which includes a DVD input for video and digital audio,
LaserDisc, the DTS preset will be automatically loaded and also supports the LP key for DTS LaserDiscs.
and no hiss will be heard. Whilst not necessary to enjoy DTS material, it is
Obviously the LP source can be re-configured available from Meridian dealers.
differently if you need it.
Using 518 with the new 565
DTS Delay If you have a Meridian 518 Digital Processor, this will
There is an additional parameter in the source Config de-jitter a DTS signal for optimum sound quality.
of the 565. (See page 48 of the Installation guide.) However the resolution enhancement features of the
The display will read: 518 are not appropriate as DTS is a compressed digital
stream, not standard digital audio. Hence your 518
‘CD DTS Del. Y’. should be switched to Bypass mode prior to listening to
This may be set to ‘Y’ or ‘N’. Setting it to ‘Y’ adds a a DTS CD or LaserDisc.
32ms delay to the audio for that source. Engaging this There is an upgrade to the 518 software, Version 1.2,
delay allows the 565 time to detect a DTS signal before which allows it to detect a DTS stream. In this case, the
it is played out, and therefore prevents the short hiss 518 automatically selects Bypass when DTS is
occurring as the disc starts playing. detected.
Setting DTS Delay to ‘Y’ is the ideal and Version 1.2 adds four DTS modes to the 518 which
recommended solution to playing DTS from CD. This can be assigned to sources in Config. The modes are:
setting is not recommended for video sources (such as • DTSMU – 518 mutes on receipt of DTS (used
LaserDisc or DVD) because an additional 32ms audio when 518 is a preamp).
delay is equivalent to one video frame, and may affect • DTSCD – detects DTS with a normal strategy and
the Lipsync with the picture. (See page 28 of the User selects Bypass.
guide for an explanation of Lipsync.) • DTSLD – detects DTS with a rapid strategy and
When you Type the 565 (page 20 of the Installation selects Bypass.
guide), the default settings for DTS Delay are ‘Y’ for • DTSMA – mastering processor mode ignores DTS.
CD, Radio and CDR, and ‘N’ for LP, TV, Tape1, Tape2,
Cable, DVD, VCR1, VCR2 and LD. These can be selected according to Type as follows:
• Type 0 – all sources DTSMU
Dedicated DTS sources • Type 1 – all sources DTSCD except DVD and LD
As we described earlier, you can attach a DTS preset which are DTSLD
in Config to one of the sources. The default • Type 2 – all sources DTSMA
configuration attaches DTS to the LP source.
When such an attachment is made, the 565 will only
play DTS material for that source.
© February 1997
You can attach any of the three factory DTS presets,
or any DTS user preset in Config. (See page 48 of the
Installation guide.)
Registered trademarks: “THX” and “THX Cinema” Lucasfilm Ltd; “Dolby”, “Pro Logic” “Dolby Digital”and “AC-3” Dolby Laboratories Licensing Corporation;
“Ambisonic” Nimbus Records Ltd; “Trifield” Trifield Productions Ltd; “Meridian”, “Boothroyd Stuart Meridian” “LipSync”and “Meridian Digital Theatre”
Meridian Audio Ltd; “DTS” Digital Theatre Systems Inc.; “DVD” Toshiba and the Ten Companies.
Meridian 565 User Request
Please register your Version 4 565 with us. We can then send you a complete user
manual when MPEG is released. You can register in the following ways:
• Complete the details below and either mail or fax this sheet to Meridian Audio in the
UK or Meridian America in Atlanta.
• Register by email by sending the necessary information to [email protected]
Your name ...........................................................................................................................
Mailing address ...................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
565 Serial number ................................................................................................................
Dealer who supplied it .........................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
Comments
Meridian Audio Limited, Stonehill, Stukeley Meadows, Huntingdon, Cambs, PE18 6ED, England
Tel: +44 1480 434334 Fax: +44 1480 432948 Web: http://www.meridian-audio.com
Meridian America Inc., 3800 Camp Creek Parkway, Building 2400, Suite 112, Atlanta GA 30331
Tel: +1 (404) 344-7111 Fax: +1 (404) 346-7111


Use: 0.0212