158 X75HD/X75SD Installation and Operation Manual
Chapter 9: Audio Configuration
AFV (Audio Follows Video) Mode
In AFV mode, each of the selectable video inputs has an audio input
selection linked to it. With this feature enabled, the audio input
selection for the channel automatically changes when the video input is
changed.
You can enable or disable AFV mode through the Audio menu. The
<channel>-AFV-<input> parameters specify the audio input channel
(“<channel>”) to be automatically switched when the SD Out Sel
parameter is switched to a specified input (“<input>”). For example,
the Ch1-AFV-SD1 parameter specifies the audio input for SRC
Channel 1 will be automatically switched when the SD Out Sel
parameter changes to SD1.
When AFV mode is enabled for any single SRC channel, the AFV LED
on the front panel of the unit will be lit.
You can override AFV mode by manually selecting a different audio
input. This will not, however, turn AFV mode off—the next time the
video input selection is changed, the audio will again follow it. AFV
mode can only be disabled through the audio menus.
Figure 9-3 on page 159 shows the default AFV audio and video
assignments. It illustrates the linked audio channels in AFV mode when
the video is switched from the composite input to SD-SDI 1 video.
When the AFV is enabled for all SRC channels, the composite input
video selection also routes analog input channels 1 and 2 to SRC
channel 1, and analog input channels 3 and 4 to SRC channel 2. When
SD-SDI 1 input video is selected, all four groups of de-multiplexed
audio channels are routed through eight SRC channels.
You can assign different audio inputs to each SRC channel, as well as
enable and disable the AFV function for each video input to create a
complex routing.
Note
The AFV mode currently
functions on the SD-SDI 1
output.
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