IME, it's about intent and focus.
If you decide something magical is going to happen, you channel forces outside of yourself to that end.
Music is a great example, because sometimes through melody and harmony alone, you can create a mental/emotional state in another.
That is magic!
But so many other media lend themselves to the same principle.
I occasionally make jewelry; in doing that, I manipulate metal through heat to create objects imbued with a certain fundamental power.
*Any* endeavour can be imbued with this psychic intent. Some more easily than others.
(Con't...)