7800/7700 MultiFrame Manual
7812UDXD Series 3G/HD Up/Down/Cross Converter with Simultaneous Dual Format Outputs and AES I/O
Page - 36
Revision 1.1.1
6.5.
AUDIO TAB
The
Audio
control menu is used to configure the on-board audio sample rate converters and the internal
audio delay block. SRC Status, Audio Delay and Detected Dolby modules are also monitored and
reported in the
Audio
menu. Sections 6.5.1 to 6.5.1.3 give detailed information about each of the menu
items.
Figure 6-4: Audio Tab
Any changes to the audio settings will cause a momentary interruption on the output
audio.
6.5.1. Audio Control
6.5.1.1.
Audio Delay
This control adjusts the audio delay +/- 300.00 ms. This delay is relative to the delay that the module
automatically inserts to match audio path and video path delays.
Note: Negative values are limited to the amount of video delay; the card does not have
negative delay ability. Additional Video delay can be added in the Video Tab in order to
achieve a greater negative audio delay. See Section 6.2.1.12 for details on how to add
additional Video delay.
6.5.1.2.
SRC Mode Configuration
This control allows the user to adjust the mode for the sample rate converters. A list of all available
options is shown below.
Enable
Enables the sample rate converters for PCM audio.
Bypass
Bypasses the sample rate converters. This setting should be used for non-PCM audio.
Auto
The module will automatically detect PCM and non-PCM audio and automatically turn on/off
the SRCs as required. Note that all SRCs are set to bypass as soon as a source of non-
PCM audio is detected within any of the 16 internally processed audio channels.