Denon AVR-1908 Owner's Manual page 38

ROOM SIZE
Determine size of acoustic environment.
[Selectable items]
small
: Simulate acoustics of a small room.
med. s
medium
med. l
large
: Simulate acoustics of a large room.
NOTE
"ROOM SIZE" does not indicate the size of the room in which sources
are played.
AFDM
(Auto Flag Detect Mode)
Auto-select surround mode by source.
This function only works for software containing a special identification
signal.
If the software being played is recorded in Dolby Digital EX or DTS-ES,
it is played in 6.1-channels. If not, it is played in 5.1-channels.
[Selectable items] ON OFF
Example : Playing Dolby Digital software (with EX flag)
• When "AFDM" is set to "ON" , the surround mode is automatically
set to the DOLBY + PLgx CINEMA mode.
• To play in the Dolby Digital EX mode, set "AFDM" to "OFF" and "SB
CH OUT" to "MTRX ON" .
Some Dolby Digital EX sources do not include EX flags. If the playback
mode does not switch automatically even when "AFDM" is set to
"ON" , set "SB CH OUT" to "MTRX ON" or "PLIIx CINEMA" .

SB CH OUT
(for Multi-channel sources
Select playback mode for surround back channels.
The surround back indicator lights.
[Selectable items]
OFF
: No signal is played from the surround back
channels.
NON MTRX
: The same signals as those of the surround
channels are output from the surround back
channels.
MTRX ON
: The surround channel signals undergo digital
matrix processing and are output from the
surround back channels.
z1
PL II x CINEMA
: Decoded in Dolby Pro Logic
surround back signal played.
z2
PL II x MUSIC
: Decoded in Dolby Pro Logic
surround back signal played.
z3
ES MTRX
: DTS signal played with digital matrix processing.
z4
ES DSCRT
: Signal included in DTS-ES Discrete 6.1-channel
sources played.
z1: This can be selected when "Surround Back Speaker" is set to
"2spkrs" at the menu "Manual Setup" – "Speaker Setup" –
"Speaker Configuration" setting (vpage 24).
z2: This can be selected when "Surround Back Speaker" is set to
"2spkrs" or "1spkr" at the menu "Manual Setup" – "Speaker
Setup" –"Speaker Configuration" setting.
z3: This can be selected when playing DTS sources.
z4: This can be selected when playing DTS sources including a
discrete 6.1-channel signal identification signal.
) SB CH OUT
(for 2-channel sources)
Determine whether to use surround back speakers.
[Selectable items]
ON
: The surround back channel signal is played.
OFF
: The surround back channel signal is not played.
This operation can be performed directly pressing the SURROUND BACK
button on the main unit.
SW ATT
(Subwoofer Attenuate)
Attenuate subwoofer level when using EXT. IN mode.
II x Cinema mode,
[Selectable items]
II x Music mode,
ON
: The input from the subwoofer channel is attenuated.
OFF
: The input from the subwoofer channel is not attenuated.
Usually use in this mode.
Set this to "ON" if the subwoofer channel level seems too high when
playing Super Audio CD.
Subwoofer
Turn subwoofer output on and off.
[Selectable items]
ON
: The subwoofer is used.
OFF
: The subwoofer is not used.
Default
Resets the settings to the default values.