Sirius 800 Series User Manual
4929 Sirius 800 Audio AES/MADI Output with Audio Delay
Output Modules and Rear Panels 11.1
Iss 5 Rev 7
Page 182
© 2017 SAM
11.1.5.3
Gain Control and Phase Invert
Gain
Gain is applied to an audio output channel as Silence (mute) or in steps of 0.1dB in a range of
-72 dB to +30 dB.
Phase Invert
Phase invert will invert the audio waveform.
11.1.5.4
Stereo Mode
Stereo Mode is used to manipulate stereo pairs. Options include: Left/Right Swap, Left Both,
Right Both and Mono Mix.
Left/Right Swap
Left/Right swap is used to swap the two audio channels of an AES pair over.
Left Both & Right Both
Left Both and Right Both are used to duplicate the selected channel of a stereo pair and pass
the two identical channels out of the router in place of the original pair.
Mono Mix
Mono Mix is used to mix a stereo pair together to create a single mono signal. This single
mono signal is passed out of the router on both of the original channels.
The Mono Mix is:
11.1.6 4929 Connections to the Audio Crosspoints
The 4929 audio output module receives two identical multiplexed audio transport streams,
each of which contains all of the audio channels on the output module (up to 768 mono
channels). One transport stream is received from the main audio crosspoint module and a
duplicate transport stream is received from the redundant audio crosspoint module. The
output module monitors the transport streams received from each of the audio crosspoint
modules for errors. If an error is found the output module will use the transport stream from
the other audio crosspoint module if it is fitted.
A
B
+
2
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Important:
•
Due to the nature of multiplexed audio transport streams there is an extremely
small delay between groups of channels as the transport stream is constructed. If
the audio is locked to the input these delays will need to be considered.
•
If the audio is locked to an external reference or is sample rate converted these
delays are managed by the router and the audio will remain co-timed.
