Public Knowledge Database Audio Production - mc² Mixing Consoles mc²56 mc²56 - Operation mc²56 - User Configuration mc²56 - Custom Functions Current: mc²56 - Fader User Button, Channel AUX On/Off mc²56 - Fader User Button, Channel AUX On/Off This function maps a fader user button to the channel's aux send on/off state.For this function, define the user button number (1 to 16), the aux on/off number and the button color for the on state. ×