T+A Elektroakustik DD 1535 R Operating Instructions Manual Download

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Dolby Pro Logic IIx Surround

In this process several independent signal channels (left,
centre, right and surround (rear)) are recorded using two
channels and a special encoding process. Since this
process only requires two recording channels, it is
compatible with many picture / sound systems which are
already widely in use (CD, video recorder, TV etc.).

The  information  is  decoded  at  playback  time  and
reproduced  in  the  listening  room  via  four  (left,  right,  2  x
rear)  loudspeakers,  although  five  speakers  (with  an
additional front centre speaker) are preferable. Dolby Pro
Logic  encoded  material  is  currently  available  mainly  in
the  film  and  video  arena,  recorded  on  video  cassettes
and DVDs, but a large number of television programmes
are  now  being  produced  and  transmitted  using  Dolby
Surround.

DTS Neo:6

The

DTS Neo:6

process can be used both for encoded

stereo material (see Dolby Pro Logic II Surround) and
also for un-encoded stereo material.

The Neo:6 decoder generates – according to setting - up
to 6 channels (left, centre, right, 2 x side, back centre)
from this; the back centre channel can also be
reproduced by 2 separate speakers if they are available.

Dolby  Digital  is  a  digital  multi-channel  surround  system
which  was  developed  specifically  for  spatial  sound
reproduction  in  connection  with  cinema  films.  The
process utilises five separate sound channels: three front
channels  (left,  centre,  right)  and  two  surround  channels.
A sixth independent bass effect channel is also present,
catering  for  low  frequency  effects  (

LFE

). That is why

such systems are said to offer

5.1

channels.

In  comparison  with  Dolby  Pro  Logic II,  Dolby  Digital
provides  two  independent  surround  channels  which
generate genuine spatial stereo sound, offering the same
realistic  stereo  reproduction  as  provided  by  the  front
channels.

The integral Dolby Digital decoder provides the means of
obtaining  a  genuine  digital  Dolby  stereo  cinema
presentation in your own living room. The discrete digital
recording  process  and  the  five  playback  channels
guarantee  a  very  wide  dynamic  range  and  accurate
spatial orientation.

The  dynamic  range  is  the  difference  in  volume  between
the  quietest  and  loudest  passages  of  a  recording.  The
original  soundtrack  of  a  film  generally  features  an
extremely  wide  dynamic  range  which  the  surround
receiver can reproduce in full.

Unfortunately not all listening rooms, and not all times of
day,  are  suitable  for  exploiting  the  full  dynamic  range.
For  example,  it  may  be  necessary  to  take  your
neighbours’  feelings  into  account  -  especially  in  the  late
evening hours.

For  this  reason  it  is  possible  to  reduce  the  dynamic
range of Dolby digital encoded sound sources in  such  a
way that quiet passages (e. g. whispered conversations)
are  reproduced  somewhat  louder,  while  loud  passages
(e. g. massive explosions) are reduced in volume slightly
(see

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