To input a particular setting or value into something else. You'll need to set the washing machine for 90 degrees to properly disinfect those sheets. I closed the oven door and set the timer for 35 minutes.

To arrange for a piece of music to accompany something. Often used in passive constructions. I actually think that scene in the film would have worked much better had it not been set to music. The way I create songs is to first write a poem and then set it to music.