Depending on how they were created, some songs, videos, or podcasts may be louder or quieter than the other items in your library. iTunes is capable of adjusting the volume automatically so that all of your songs, videos, and podcast have the same volume using Sound Check. iTunes also has a built-in feature that lets you adjust volume levels for individual tracks. Any adjustments you make using the instructions below will stick with that item—whether you're playing them in iTunes or on an iPod.
For further information on listening responsibly, please visit apple.com/sound.