The group mute button is like a global mix override that works for every song.
It is very useful for setting up a standard mix to work with your worship team. For example, you may always have an acoustic guitar, bass and keyboard in your band so these can be muted all the time. Using the ‘group mute’ function in this way means that you don’t need to set muting individually for every song.
If, however, you want to set up a mix for each song in your set it would then be possible to use the ‘group mute’ to hear a different combination of instruments. For example, being able to strip back to just bass and drums in the middle of a song.
All mixes are reset back to default by hitting the reset mix button.