ML5 Mute to create ABY function

Is it possible to send a Midi Message to a ML5 to mute it’s output?

This would be handy as a global mute for your rig, or if you have 2 ML5s running in stereo you could create an ABY box of sorts.

If this can’t be done by a Midi message, I think I may still try to do it by activating Loop E with a cable plugged into the Send (going nowhere) and nothing plugged in to the Return.