In so many ways, music is emotion. Studies of the brain tell us that our minds react in different ways to the sound of music. So it's only natural that you'll want to take all that musical magic and sprinkle it over your podcast.Well, not so fast. Music — and composing it — can get really complicated, especially if you're going to enter NPR's Student Podcast Challenge.So, here's our guide to helping you put great music into your podcast, so that when you sit down at the keyboard to create that magic, you'll know the very specific rules that limit what you can and can't do.