Use it as a cable checker I/O. Turning down the volume so that lovely crackling noise don’t get you everybody’s gritty attention, and checking the screen to see that the signal output reacts .
Minding also the guitar tech here (who should be the absolute only other person getting near your QC. Especially don’t let the smacked xylophone player near it ).
No use for another very handy gadget.
Bless