NAIM AV2 Owner's Manual - page 27
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material encoded for a “2.1” (two main channels with one sub-
woofer channel) channel scheme is also available and can be
handled within Dolby 2/0 decoding.
19.6.5 Dolby Digital Surround EX
The Dolby Digital Surround EX theatre system was co-developed
by Dolby Laboratories and Lucasfilm THX, and was first used
theatrically for the movie Star Wars: Episode I: The Phantom
Menace in 1999. The system uses 5.1-channel Dolby Digital
encoding but delivers an additional surround channel by mixing
its signal into the left surround and right surround channels
using matrix encoding. This additional channel is matrix decoded
upon playback and routed to one or more centre rear speaker.
Listeners with regular 5.1 channel Dolby Digital systems do
not lose the extra surround channel information; it is simply
reproduced by the left surround and right surround channels.
19.6.6 DTS Surround
DTS Surround is an alternative digital audio encoding format
that has become popular with feature film producers and can
therefore be found on many DVDs. The first feature film to
be DTS encoded was Jurassic Park in 1993. DTS Surround
provides a similar 3/2.1 channel scheme to Dolby Digital with the
encoding technology also providing data compression. The DTS
data compression ratio is lower than that in AC-3 however and it
is argued that DTS can provide better audio quality. The downside
of any quality improvement over AC-3 is however higher data
storage requirements.
19.6.7 DTS-ES Matrix
DTS-ES (Extended Surround) Matrix is an enhancement of DTS
Surround where a seventh channel is matrix encoded into the
left and right surround channels (matrix encoding is the class
of technology used in Dolby Surround Pro Logic). DTS-ES Matrix
provides a 6.1 channel scheme with the extra channel used to
reproduce effects located directly behind the listener.
19.6.8 DTS-ES Discrete 6.1
DTS-ES Discrete 6.1 differs from ES Matrix in providing a fully
independent seventh audio channel rather than it being matrix
encoded into two existing channels. This enhancement provides
opportunities for producers and engineers to generate surround
effects that would not be otherwise possible.
19.6.9 DTS Neo:6
DTS Neo:6 provides a decoding technique that enables legacy
analogue or digital stereo programme material to take advantage
of contemporary decoding technology and 6.1 channel schemes.
Material matrix encoded for four surround channels, or even
un-encoded stereo material can be processed by the DTS Neo:6
decoder to generate 3 main channels, 3 surround channels. The
low-frequency channel is generated by down-stream filtering.
19.7 Accessory Functions
The AV2 has six accessory functions accessible at all times from
the handset. The AV2 display will temporarily indicate selection
or de-selection of these functions.
19.7.1 Cinema EQ
Cinema EQ provides compensation for the over-emphasised high
frequency sound of some cinema soundtracks. It is selected or
disabled by pressing the menu key followed by the 2 key.
19.7.2 Bass Mix
The Bass Mix option routes main left and right loudspeaker
bass information to the sub-woofer. It is selected or disabled by
pressing the handset
menu
key followed by the
1
key.
Note:
Bass Mix is useful for encode formats that carry no specific
sub-woofer information.
19.7.3 Mute
The
mute
key immediately reduces the volume to zero. A second
operation restores the volume to its previous level.
Note:
The volume can also be restored after a mute command
by turning the front panel volume control to zero and then up to a
normal listening level.
19.7.4 Display
The
disp
key switches the AV2 display off. When switched off
the display will temporarily flash information when changes are
made. A second operation will restore the display.
Note:
The disp key is also used to restore AV2 setup defaults. See
Section 20.
19.7.5 Midnight
The
midn
key compresses the signal and reduces the bass
content. It can help reduce disturbance to others from late night
listening.
Note:
Midnight is only available with Dolby Digital programme
material.
19.7.6 On-screen Display
When an AV2 is connected to a Naim DVD player pressing
osd
key will temporarily display the system status bar.
Note: Pressing the osd key will also cause the AV2 display to scroll
through the current state of each accessory option.
Note: See the DVD5 section of this manual for full information on
AV2 setup via On Screen Display
19.7.7 Standby
The
standby
key returns the AV2 to standby mode. The Naim
logo will remain illuminated and the display will show a single
dot.
AV2