Crown Audio IQ-MSD Turbo Software - Manual (Page 158)

IQ–MSD Turbo 1.4 Advanced IQ System Software
Page 158
Mute: Each input is individually muted with these controls. The muting is post-processed after all other functions.
This is important because of the following possible scenario: With the Gate and Duck Priority functions both turned
on, it is possible for a higher priority input to open while it is muted. Of course, this will result in no sound.
The following list shows the possible settings for each Mute function control.
Allow Mute: On/Off
Mute: On/Off