There are six separate mute groups on the BehringerX32 that can be assigned to multiple channels. Using mute groups can be useful to mute multiple effect busses or inputs at once. This method is much faster than muting channels
1. Press the MUTE GRP button right of the screen.
2. While holding the desired Group button, press the SELECT keys for any channels or busses that you wish to assign to that mute group.
3. When you are done assigning channels to the mute group, press the MUTE GRP button next to the display again. The channel SELECT buttons will now work normally again.
4. your mute groups should now work!