Audio Processing and Flow

An audio signal is embedded into the ancillary data of a video signal before is comes into the switcher. This includes both standard embedded audio that comes from external sources and the audio sources from the 1RU Audio Breakout Module. These audio sources are then brought into the audio mixer where they can be mixed and re-embedded on an output video signal.

Figure: Audio Flow Through the Audio Mixer

As the embedded audio signal comes into the switcher and is manipulated, you must ensure not to perform an operation that will force the ancillary data to be stripped. Once an audio signal is in the switcher sub-system the audio mixer is able to manipulate and re-embed it in the video signal. Pass-thought embedded audio can be stripped from the ancillary data if the video source is manipulated.

Figure: Audio Flow Through the Switcher Subsystem

The following restrictions apply to ancillary data being included in the output:

  • All ME program buses pass ancillary data.
  • MultiViewer outputs do not include any ancillary data.
  • MiniME™ and MultiScreen outputs do not include any ancillary data unless an ME with ancillary data is re-entered onto the background bus.
  • ME Preview does not include ancillary data unless the background is not selected as part of the next transition.
  • A MiniME™ or MultiScreen can include ancillary data if an ME is re-entered onto the background.
  • Any format conversion on the input video signal.
  • Setting ancillary data to be stripped.