Grass Valley iTX System v.2.6 - Manual (Page 211)

Configuring the audio output for a playout channel
Track-group numbering for mono-track outputs
Once two tracks are grouped together (i.e. have the same group number), iTX treats them as a
stereo pair. Since iTX does not split stereo pairs to produce a mono output, this means neither
track in the same group can then be mapped to a mono output track.
Because of this, if the audio output of a channel is to include mono tracks, the default group
numbers should not be modified. Ensure Group Mono Tracks under the Media Watcher Setup
tab is not selected.
Replicating a mono source track for a PCM stereo output track
When the channel configuration specifies a PCM stereo output track, and the only available
track is a PCM mono track, iTX replicates the mono track and plays it on both (left and right)
channels of the output track.
XML code for the channel-mapping configuration
The channel-mapping configuration is stored as XML code in the System Database. From the
Audio Mapping panel, you can open an XML Viewer to view the XML code for a selected
configuration:
This is an example of a configuration for two Dolby D (Auto) output tracks with English and
Spanish tagged content:
Each Output element has four attributes:
– The pin attribute is associated with a channel in the output track. iTX allocates groups of
pins in order based on the channel requirements of the selected encoded-data format. So,
for instance, two pins are allocated to a Dolby D data stream. In the XML code, only the
first pin in a group needs to be specified.
– The type attribute specifies the number that identifies the audio type of the output track.
See earlier in this section, "Selecting the audio type".
– The language attribute specifies the tag of a required source track.
– The staticTrack element specifies the number of a required source track.
March 2015 System Administrator Guide Page 211 of 404