Get music and other audio content on to iPod touch in the following ways:
Purchase and download from the iTunes Store: In Music, tap Store. See iTunes Store at a glance.
iTunes in the Cloud: When you’re signed in to the iTunes Store, all of your previous purchases automatically appear in Music. See iCloud.
Sync content with iTunes on your computer: See Sync with iTunes.
Use iTunes Match to store your music library in iCloud: See iTunes Match.