Can I mute a specific channel with a MIDI controller?

Hi,

I was wondering if anybody knows if it’s possible to mute a specific channel with a MIDI controller.

I am scoring against a video/audio track, and need to be able to quickly mute the video’s audio track (preferably with a MIDI controller, but a keyboard shortcuts works as well), without having to select the channel or move focus to the arrangement window.

If anyone know if and how this is possible, I would be very grateful.