– toggling ABCD inputs quickly
First thing I did was reprogram a bunch of soft keys to toggle between sockets A and B on various wireless mics. It’s a great way to have a backup transmitter without having to worry about keeping channel settings in sync, and switching to actions let me save myself from having a 2nd soft key to switch an input back to socket A (although, TBH, I mostly had that in case I was an idiot and hit the wrong button… if a show’s gone so wrong that the backup transmitter’s failed and you need to switch back to the hopefully-now-working primary while it’s all live, you’re probably past the “make it look slick & easy” stage).
I often do the same thing for people who move between multiple mics… I’m not going to claim there’s 0 difference between how they sing at guitar vs how they sing at piano, but it’s usually close enough that I find it easier to make any necessary tweaks than try to keep everything else synced between a couple channels (although maybe not anymore since we can gang Dyn8s now).
