28
Down Mix Mode
Down mix is the process of converting multi-channel audio to a lesser
number of channels. For example, converting a 5.1ch source to stereo or
converting a 7.1ch source to 5.1ch. Down mixing allows the audio output
from the player to match the exact number of speakers available in your
home theatre system.
The current down mix mode is displayed in the lower right corner of the
speaker placement illustration.
To change the audio down mix setting, press the Enter button while the
cursor is over the "Down Mix" option. The following down mix modes are
available:
LT/RT – Left Total/Right Total. The centre and surround channels are
decoded and then Matrix encoded into the two front channels. A Dolby
Pro Logic receiver can then decode the two channel audio that is output
back into surround audio.
Stereo - This mode down-mixes multi-channel audio to 2-channel stereo
output. For original stereo content the output will not change. For original
multi-channel content the surround and centre channels will be mixed
with the left and right front channels. Recommended for use with TV sets
or stereo receiver/amplifiers (without ProLogic decoding).
5.1Ch – This mode enables 5.1ch decoded audio output. The number of
actual output channels depends on the disc. If the source content has
more channels, the surround back channels will be mixed into the
surround channels.
7.1Ch – This mode enables 7.1ch decoded audio output. The number of
actual output channels depends on the disc.
Speaker Settings
For each speaker in the home theatre system, you can set its size,
distance and trim level. To configure a speaker, move the cursor to
highlight the speaker and press the Enter button. The Speaker Settings
menu on the right side of the screen will be activated. In the Speaker
Settings menu, use the /buttons to select a parameter, and then
press the Enter button to change it. To exit the Speaker Settings menu
and return to the Speaker Configuration illustration, press the button
or select the "Exit"option. You can also move on to configure the next
speaker by selecting the "Next Speaker"option.
The following speaker parameters can be configured:
1. Size
The speaker size parameter sets bass filtering control for the speakers.
The bass crossover frequency is fixed at 80Hz. The options are:
Large – Bass frequencies are passed to the speakers.
Small – Bass frequencies are not passed to the speakers to reduce
possible distortion. If a subwoofer is available, bass frequencies are
redirected to a subwoofer.
On (for subwoofer only) – Specify that a subwoofer is available.
Off – Speaker for the corresponding position does not exist. Audio for the
missing speaker is redirected to other speakers or discarded if redirection
is not possible.
Note: The front, surround and surround back speakers are configured as
pairs. Changes to the size of one speaker will automatically change the
other speaker of the pair.
2. Distance
The speaker distance parameters sets delay control for the corresponding
audio channel. This delay is used to compensate for the audio
propagation time difference caused by the placement of speakers of
different distances from the listening position.
Speaker distance delay is only applied if the player is decoding multi-
channel audio. If you use bitstream audio output to your A/V receiver, the
bitstream audio is not adjusted for speaker distance delay.
Since the delay is calculated based on the distance difference from each
speaker to the listener’s position, it is important to set the distance for the
front speakers first and then the other speakers. Anytime you change the
distance of the front speakers, the distance of the other speakers will be
automatically adjusted to maintain the same distance difference.
For example, in the above diagram, measure the distance (in feet) from the
primary listening position to the Front Left or Front Right Speaker. Your
Front Right and Left speakers must be the same distance from the
listener. Enter the distance of the Front Speakers (1. in the above picture)
into the "Speaker Configuration"menu.
Next, measure the distance (in feet) from the centre speaker (2) to the
listening position. Move the cursor to highlight the Centre speaker in the
Channel Delay setup page, and enter the distance (as close as possible)
in feet. Repeat for each speaker in the system (Centre, Surround Left,
Surround Right, Surround Back Left, Surround Back Right and Subwoofer)
as available.
Note: The distance between the surround speakers and the listener must
be shorter than or equal to that between the front speakers and the
listener.
