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The AVR-1610 is equipped with a digital signal processing circuit that lets you play program sources in the surround mode to achieve the same sense of presence as in a movie theater.
Dolby Digital
Dolby Digital is a multichannel digital signal format developed by Dolby 
Laboratories.
A total of 5.1-channels are played: 3 front channels (“FL” , “FR” and 
“C”), 2 surround channels (“SL” and “SR”) and the “LFE” channel for 
low frequencies.
Because of this, there is no crosstalk between channels and a realistic 
sound  field  with  a  “three-dimensional”  feeling  (sense  of  distance, 
movement and positioning) is achieved.
A  real,  overpowering  sense  of  presence  is  achieved  when  playing 
movie sources in AV rooms as well.
Dolby Digital Plus
Dolby Digital Plus  is  an improved Dolby Digital  signal  format that  is 
compatible with up to 7.1-channels of discrete digital sound and also 
improves sound quality thanks to extra data bit rate performance. It 
is  upwardly  compatible  with  conventional  Dolby  Digital,  so  it  offers 
greater flexibility in response to the source signal and the conditions 
of the playback equipment.
Dolby TrueHD
Dolby TrueHD is a high definition audio technology developed by Dolby 
Laboratories, using lossless coding technology to faithfully reproduce 
the sound of the studio master.
This format is compatible with a maximum sampling frequency of 96 
kHz and up to 7.1-channels, so it is used  for applications particularly 
prioritizing sound quality.
Dolby Pro Logic gx
Dolby Pro Logic gx is a further improved version of the Dolby Pro Logic 
g matrix decoding technology.
Audio signals recorded in 2-channels are decoded to achieve a natural 
sound with up to 7.1-channels.
There  are  3  modes:  “Music”  suited  for  playing  music,  “Cinema” 
suited for playing movies, and “Game” which is optimized for playing 
games.
Dolby Pro Logic g
Dolby Pro Logic g is a matrix decoding technology developed by Dolby 
Laboratories.
Regular  music  such  as  that  on  CDs  is  encoded  into  5-channels  to 
achieve an excellent surround effect.
The surround channel signals are converted into stereo and full band 
signals  (with  a  frequency  response  of  20  Hz  to  20  kHz  or  greater) 
to create a “three-dimensional” sound image offering a rich sense of 
presence for all stereo sources.
Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the  double-D  symbol  are  trademarks of 
Dolby Laboratories.
Dolby Digital EX
Dolby Digital EX is a 6.1-channel surround format proposed by Dolby 
Laboratories that allows users to enjoy in  their homes the “DOLBY 
DIGITAL  SURROUND  EX”  audio  format  jointly  developed  by  Dolby 
Laboratories and Lucas Films.
The 6.1 channels of sound, including surround back channels, provide 
improved sound positioning and expression of space.
Surround
Dolby Surround
Dolby Pro Logic gz
Dolby Pro Logic gz introduces a new dimension to Home Entertainment 
through the addition of a pair of front height channels. Compatible with 
stereo,  5.1  and  7.1  content,  Dolby  Pro  Logic  gz  provides enhanced 
spaciousness,  depth  and  dimension  to  movies,  concert  video  and 
videogame playback while maintaining the full integrity of the source 
mix.
Dolby  Pro  Logic  gz  identifies  and  decodes  spatial  cues  that  occur 
naturally in all content, directing  this  information to  the front height 
channels, complementing the performance of left and right surround 
sound  speakers.  Content  that  is  encoded  with  Dolby  Pro  Logic 
gz  height  channel  information  can  be  even  more  revealing,  with 
perceptually discrete height channel information bringing an exciting 
new dimension to home entertainment.Dolby Pro Logic gz, with front 
height channels is also an ideal alternative for households that cannot 
support  the  placement  of  back  surround  speakers  of  a  typical  7.1 
channel system but may have bookshelf space available to support the 
addition of height speakers.
DTS Surround
DTS Digital Surround
DTS Digital Surround is the standard digital surround format of DTS, 
Inc., compatible with a sampling frequency of 44.1 or 48 kHz and up 
to 5.1-channels of digital discrete surround sound.
DTS-ES™ Discrete 6.1
DTS-ES™ Discrete 6.1 is a  6.1-channel discrete digital  audio  format 
adding a surround back (SB) channel to the DTS digital surround sound. 
Decoding  of  conventional  5.1-channel  audio  signals  is  also  possible 
according to the decoder.
DTS-ES™ Matrix 6.1
DTS-ES™  Matrix  6.1  is  a  6.1-channel  discrete  digital  audio  format 
inserting  a  surround  back  (SB)  channel  to  the  DTS  digital  surround 
sound through matrix encoding. Decoding of conventional 5.1-channel 
audio signals is also possible according to the decoder.
DTS-HD High Resolution Audio
DTS-HD  High  Resolution  Audio  is  an  improved  version  of  the 
conventional DTS, DTS-ES and DTS 96/24 signals formats, compatible 
with  sampling  frequencies  of  96  or  48  kHz  and  up  to  7.1-channels 
of  discrete  digital  sound.  High  data  bit  rate  performance  provides 
high quality sound. This format is fully compatible with conventional 
products,  including  conventional  DTS  digital  surround  5.1-channel 
data.
DTS-HD Master Audio
DTS-HD Master Audio is DTS, Inc’s lossless audio format compatible 
with up to 96 kHz/7.1-channels. The lossless audio coding technology 
faithfully  reproduces  the  sound  of  the  studio  master.  It  is  fully 
compatible  with  conventional  products,  including  conventional  DTS 
digital surround 5.1-channel data.
DTS NEO:6™ Surround
DTS  NEO:6™  is  a  matrix  decoding  technology  for  achieving  6.1-
channel surround playback with 2-channel sources. It  includes “DTS 
NEO:6 Cinema” suited for playing movies and “DTS NEO:6  Music” 
uited for playing music.
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