AJA FS2 - Manual (Page 137)

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139 FS2 Installation and Operation Manual — System Screen
AES/EBU SRC This group of settings controls audio sample rate conversion on AES/EBU input audio
channel pairs 1/2, 3/4, 5/6, 7/8, 9/10, 11/12, 13/14, and 15/16.
When (14.0) AES/EBU SRC Mode is set to Auto, no settings per channel are required;
sample rate conversion occurs normally for all channels unless the non-audio flag is
set in the Channel Status Word, in which case sample rate conversion gets bypassed
and the signal is passed through unaltered.
When 14.0 AES/EBU SRC Mode is set to Manual, each channel pair can be set manually
to On or Bypass. using the AES/EBU SRC settings (parameters 14.1–14.8).
On is the default setting in which audio is rate-converted and synced with video (SRC
is applied).
Bypass is available for use when Dolby ® 5.1 and similar schemes need to be preserved
and the audio data passed unaltered (no SRC is applied).
Set these parameters to Manual (14.0)and Bypass (14.1-14.8) only if the following are
both true:
1. You want to pass unaltered digital encoded audio from either an embedded or AES
Input to an embedded and/or AES Output.
2. You have the embedded or AES input genlocked to the FS2 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 FS2 and the upstream source of the embedded or
AES input to the FS2.
(14.1-14.8) AES/EBU SRC Selections Selection Descriptions
On (default)
Bypass
Audio sample rate conversion (SRC) is applied to the affected
channel pairs and keeps the video and audio synchronized.
Audio sample rate conversion (SRC) is NOT applied to the
affected channel pairs. The signal is passed through
unaltered, which is useful for preserving Dolby
®
5.1
embedded audio and other applications where existing data
on the input must be preserved and passed to the output.