Grass Valley Indigo AV Mixer v.1.2.2 - Manual (Page 131)

INDIGO AV Mixer User Manual 131
Setup Main Menu
Audio Output
In this section, you can change the settings for Main Out and Sub-Out.
Figure 66. Audio output assignment
Main Out
Select the VU Source, i.e. if you want the PFL (“pre masterfader”) or the
AFL (“after masterfader”) signal to be displayed by the main VU meter on
the right side of the screen.
You can also set the XLR Out Level (i.e., the output gain) to Low , Mid or High .
Sub Out
Provides the same options as Main Out.
In addition, you can set a Delay in milliseconds (independently for left
and right channel), for example, to balance wide distances between the
speakers.