You'd just need to learn a lot of practice with dunamis for each of your emotions. I can't make music but I'm working on this.

[Auron has to give himself some room to concentrate and gather up a particular emotion -- anger -- for this work. But it looks like the ghostly, fiery outline of a giant katana, the hilt in his hand. He can't conjure it up for very long before he has to stop and take a breath.]

Still working on it, like I said.