Audio Override Commands

The normal Audio Follow Video (AFV) mode is where an audio channel is taken on-air when the input video source it is assigned to is taken on-air. The audio will follow the video on and off-air like this for transitions only on MEs that are on-air (re-entered onto the Program/Preset ME) unless the Audio Transition personality setting is set to All.

Tip: If you fly a key, and then expand it to full frame, the underlying video is still on-air, even though you cannot see it. The audio for both video signals will still be on-air. This is also important to remember if you are running shots from memories where you bring a key full-frame from an over the shoulder shot.

The Override mode is when the normal AFV mode has been altered, either by changing the levels, taking more or fewer channels to air, or altering the channels that will be taken to air on the next transition. Overrides are applied by using one of the audio custom controls. For example, if you have an over the shoulder shot, the audio channels for both the talent and the key would be on-air as per normal AFV. If you transition to a shot with only the VTR Clip, then the audio from the talent would be taken off-air. If you wanted both audio channels to remain, you would have to set up an override by turning on the audio crosspoint for the talent on the Preset bus. When you make the transition, the switcher takes the video off-air, but keeps the audio on.

During all audio transitions, the switcher keeps track of three separate levels for each audio channel, or group.

  • Current — the level of the channel, or group, that is currently on-air. This level can be adjusted using the PGM Audio Lvl custom control that is assigned to that channel, or group.
  • Preset — the level of the channel, or group, that takes effect during the next transition of the audio. This level can be adjusted using the PST Audio Lvl custom control that is assigned to that channel, or group.
  • Default — the level that the channel, or group, was set to originally. When you perform an Audio Reset custom control, all off-air audio channels will have their preset levels changed to the default level. This will not change the Preset levels for the audio channels that are on-air.