AJA FS1 - Manual (Page 49)

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41 FS1 Installation and Operation Manual — 4.4 Sample Rate Convert
4.4 Sample Rate Convert
This parameter controls audio sample rate conversion on input audio. ON is the
default (audio is rate converted and synced with video) and OFF is a setting for use
when Dolby
® 5.1 and similar schemes need to be preserved and the audio data passed
unaltered. This setting should be left ON unless both of the following are true:
1. You want to pass digital encoded audio from either embedded or AES into
embedded and/or AES out.
2. You have the embedded or AES input genlocked to the FS1 output. In other words,
the encoded audio will not survive the frame-sync function (dropping or repeating
frames) so it needs to be set to lock to the input. You can lock to a reference only if
that reference is driving both the FS1 and the upstream source of the embedded or
AES input to the FS1.
Note: If parameter 4.5 Audio Follow Video is set to ON, then Sample Rate Convert
selection is independently kept for each separate input: SDI 1, SDI 2, Composite, S-
Video, and Component. If Audio Follow Video is set to OFF, then another Sample
Rate Convert selection is used.
4.5 Audio Follow Video
This parameter determines whether audio settings are remembered for each video
input.
4.4 Sample Rate Conversion Description of Choices
Parameter Adjustments:
ON (Default)
OFF
Normal operation. The FS1 performs audio sample rate conversion and keeps the
video and audio synchronized.
The FS1 does not sample rate convert the audio, leaving embedded audio as-is,
useful for Dolby
® 5.1 embedded audio and other applications.
Audio Follow Video applies to these
parameters:
Audio Follow Video does not apply to
these parameters:
• 2.2 Audio Input
• 2.11—2.18 Audio Map
• 2.21—2.24 Audio Map (Stereo)
• 4.2 Audio Delay
• 4.4 Sample Rate Convert
• 20.0 Audio Output Levels
• 20.1—20.8 Audio Level Ch (n)
• 21.0 Audio Output Phase
• 21.1—21.8 Audio Phase Ch (n)
Note:
Turning Audio Follow Video (AFV) ON
results in the loss of the above settings. When AFV is
turned ON, the source-memory settings are written
over the current settings. Turning AFV OFF again will
not restore the original settings, but instead will result
in the source-memory settings remaining in effect
until edited again.
• 4.1 Analog Audio Std
• 4.3 Embed Audio Out