If I call a stand and its non productive but I know there are yotes there I change up every time till I play the music that they like.
Now if i shoot and miss one from a stand I not only change the calls and cadence but I will set up diffrently than when I shot and missed. even then unless everything goes just right the yotes seem slower to respond to that area.
I do believe that Sly has this one nailed pretty good. Once a coyote has had a bad experience with your setup, he gets smart. Sometimes it seems that changing location a little bit for your stand is more important than changing sounds, but it sure don't hurt to change both.