Crystal Vision
Appendix 1
Audio
Input
The audio status and control tab is where the non-routing audio controls are located. In
this menu, green LEDs are used to indicate audio present on the 16 audio channels
embedded in the incoming video. Further LEDs are used to indicate whether any of the
16 channels are silent or contain Dolby E. The mono-stereo, invert and resample
controls are also found here.
De-embedded Input
AES Audio Input
For each of the 16 channels de-embedded
from the input video signal.
For all AES channels from optional
DIOP4 piggybacks configured as inputs.
Present
On if the audio channel is present.
Silent
On if the audio channel is silent i.e. consistently below the set threshold.
Invert
Select to enable inversion of the de-embedder output for the selected channel.
Dolby E
On if the channel pair has Dolby E encoding.
Mono
Select to mono the channel pair. N.B. Only the 1
st
channel of the stereo pair is converted to
mono, the 2
nd
channel is unchanged. The mono output is gain corrected to maintain unity
gain.
Resample
Select to enable resampling of the selected stereo pair output from the de-embedder.
Resampling is used to seamlessly match the timing of audio signals when the user-
controlled delay is altered and is the default condition. If resampling is deselected it is
essential that the input and output source is derived from the same source and the timing
should not be adjusted while on air. Without resampling, an adjustment in timing will
cause a number of audio samples to
be dropped or repeated.
TANDEM 320 User Manual R1.3
53
11 July 2019
