Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 183)

MAESTRO Installation and Service Manual 183
3rd Step: Audio Sets
mute the monitor outputs, unless they use some outboard monitoring
equipment for example and wish to have the non-audio signals such as
Dolby E pass to the downstream audio equipment.
Note Muting non-audio will mute all audio.
Router Status Audio Mute
Choices are:
• Yes (default)
• No