Your iOS device has a built-in app that lets you play music. On the iPhone and iPad, it's called "iPod." On the iPod touch it's called "Music." The app lets you browse songs, albums, artists, create playlists, and more. Even cooler, the Voice Control feature (available for the iPod touch gen 3 and 4 and the iPhone 3GS onward) allows you to play songs by speaking a command like, "Play Artist John Lennon." The following will help you maximize the music capabilities of your device.