Configuring A/V and Closed Caption Settings
Lip Sync Delay
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DCX700 High-Definition Digital Set-Top Box • User Guide
The Audio Output setting allows you to specify the digital audio format
delivered over the HDMI output by the DCX700. Options include Auto, L-
PCM, and Pass Through. By default, the Auto option is selected. The options
are used as follows:
Auto – The DCX700 will provide the digital audio format specified by the
connected device (TV or home theater receiver) when that device was first
connected to the DCX700.
L-PCM – The DCX700 will provide all audio in the Linear Pulse Code
Modulation digital audio format. The L-PCM format is widely supported by
most HDMI televisions and home theater receivers.
Pass Through – The DCX700 will provide the same digital audio format on
the HDMI output as is provided with the program being viewed at that time.
For example, if the program has a Dolby Digital soundtrack, the DCX700 will
pass the Dolby Digital audio to the HDMI output. This option is most useful
when connecting the DCX700 to a home theater receiver that has HDMI
Note: Adjusting these settings could result in a loss of audio. Only a
professional installer or someone with a good working knowledge of the
digital audio formats supported by the TV and/or home theater receiver should
change this setting
The Lip Sync setting allows you to adjust the amount of time the audio signal
is delayed with respect to the video signal on the HDMI output. Some HDMI
televisions and home theater receivers add an extra delay to the video signal
during processing which can produce an effect where the audio noticeably
"leads" the video.
By default, this option is set to Auto. The options are used as follows:
Auto – The DCX700 will automatically delay the audio signal on the HDMI
output by the amount of time requested by the connected HDMI device.
Manual – The DCX700 will delay the audio signal on the HDMI output by
the amount of time selected for the Lip Sync Delay setting.
Off – The DCX700 will not delay the audio signal on the HDMI output.
The Lip Sync Delay setting is only available when the Lip Sync option has
been set to Manual. The Lip Sync Delay setting can be adjusted between 0
milliseconds (msec) and 500 milliseconds in 50 millisecond increments. If the
Lip Sync option has been set to either Auto or Off, this option is disabled and
no longer selectable in the menu.
Use this option to adjust the HDMI audio delay if you notice that the video
image routinely seems to be "behind" the audio soundtrack when using your
Selecting this option will return you to the User Settings Menu main screen.
Selecting this option will restore all of the settings on this screen (HDMI/DVI
Mode, Color Space, Audio Output, and Lip Sync) to their default value. Use
this option if audio and/or video has been lost after adjusting these settings
from their default values.