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Audio Adjust
Front left speaker Front right speaker
Listening angle
3-5. LFE Level Sub-menu
This sub-menu is for setting the LFE (Low Frequency Effect) levels
included in Dolby Digital and DTS software.
Setting Values Initial value
a. Dolby Digital –∞, –10 dB to 0 dB 0 dB
b. DTS –∞, –10 dB to 0 dB 0 dB
a. Dolby Digital
The level can be adjusted to either –∞ or between –10 and 0 decibels
in 1-decibel increments. For Dolby Digital input source signals, the
LFE level set here is used. A setting of 0 decibels is recommended
for optimum performance; however, if the source is recorded with
the low frequency range too strong, lower this setting as necessary.
b. DTS
The level can be adjusted to either –∞ or between –10 and 0 decibels
in 1-decibel increments. For DTS input source signals, the LFE level
set here is used. A setting of 0 decibels is recommended for optimum
performance; however, if the source is recorded with the low
frequency range too strong, lower this setting as necessary.
3-6. Mono Sub-menu
The settings of this sub-menu shown below are enabled when the
listening mode is set to “Mono.”
Setting Values Initial value
a. Academy Filter On, Off Off
b. Input Channel Auto L+R, Left, Right Auto L+R
a. Academy Filter
Older monaural film mixes relied on high-frequency rolloff in
presentation to sound properly balanced, so that excessive hiss from
the grain structure of the film would not be heard. The high-
frequency loss was typically due to a combination of optical slit loss,
electrical filters, loudspeaker response, and screen loss. Some films
have been transferred to video without such a high-frequency rolloff,
and thus sound overly bright and hissy.
The TX-NR900/900E includes this “Academy filter,” which is based
on contemporary playback practices for such films over wide-range
systems.
This can be set to either “On” or “Off.”
b. Input Channel
This allows you to set which input channel to use for monaural
sound.
Auto L+R: Select this under normal circumstances. When the
input source is center channel, this center channel is used as the
monaural sound input channel. Otherwise, the left and right
channels are mixed and the mixed signal is used as the monaural
sound input channel.
Left/Right: You will need to select either left or right when
playing a video source that contains bilingual data. In such a
case, the left and right channels will contain the audio for
different languages. Select the channel with the language you
desire.
3-7. Theater-Dimensional Sub-menu
Select this to modify the Theater-Dimensional (T-D) listening
modes. The settings available are shown in the table below.
Setting Values Initial value
a. Listening Angle 20°, 40° 40°
b. Center On, Off Off
c. Front Expander On, Off Off
d. Virtual Surr Level –3 dB to +3 dB 0 dB
e. Dialog Enhance On, Off Off
a. Listening angle
The listening angle is the angle subtended by the front left and right
speakers as seen from the listener. The processing for the virtual
surround will be based on this angle. The setting of 20 and 40
degrees are only for nominal purposes, so select the setting that is
closest to your actual listening angle.
b. Center
In the Theater-Dimensional mode, if the speaker system has a center
speaker, the center channel signal can be output from the center
speaker. For instance, in systems where the front left and right
speakers are small, use of the center speaker may provide a better
sound space and reduce the load on the front speaker. (For the proper
soundfield, it is important that the speaker levels and speaker distances
among the front right, front left, and center speakers are matched. In
order to ensure this, make sure that the settings in the Speaker Distance
Sub-menu and Level Calibration sub-menu are set correctly.)
On: Select to have the center channel signal output to the center
speaker.
Off: Select to have the center channel signal output to the front
left and right speakers (Phantom Center).
c. Front Expander
The front expander function spreads out the stereo image in front of
the listener. The created stereo image is as if the front speakers have
been farther apart for the feeling of a wide sound space. This is
especially useful for narrow listening angles of 20 degrees or less.
On: Select to turn on the front expander function to simulate a
wider sound space.
Off: Select to turn off the front expander function for a normal
sound space.
d. Virtual Surr Level
This setting adjusts the level of the virtual surround signal. This can be
set from –3 to +3 decibels. Lowering this setting can improve the
sound when the definition is unclear or when the sound feels
unnatural.
e. Dialog Enhance
If the dialog from the center channel is difficult to hear in the
Theater-Dimensional mode, use this setting to improve the clarity.
On: Select to enhance the vocal ranges of the center channel
signal.
Off: Select to output the center channel signal at the regular level
and frequency characteristics.