Avid Technology Artist Mix User Manual page 14

Connecting a Footswitch
The Artist Mix has a ¼-inch FOOTSWITCH input on the back panel. The footswitch can be used to punch in and out of recording.
Plug the footswitch in before powering on the Artist Mix. See "Footswitch" on page 30 for more information.
FOOTSWITCH input on rear panel
10 Artist Mix User Guide