The control ring on the iPod Shuffle has plus (+) and minus (−) buttons to pump up (or down) your music's volume. The volume knob on the larger iPods is virtual. With the song or video playing, run your thumb over the click wheel; the timeline bar on the bottom switches to a volume-level indicator.
If you want to protect your hearing, use the Volume Limit setting to lock in a maximum volume of your own choosing. Parents who worry that their kids are blasting music too loudly can set a Volume Limit and lock it with a numeric password:
❶ Go to iPod→Settings→Volume Limit (on the Classic), or iPod→Settings→General→Volume Limit(on the Nano).
❷ On the next screen, use the click wheel to select the highest volume level you want to have on the volume bar.
❸ Press the Play/Pause button to set it and to move to the next screen. (On the Nano, press the center button and choose either Done or Lock on the next screen. If you pick Lock, the next step is for you.)
❹ The iPod's Screen Lock display appears and you can dial in a secret four-number password that must be entered again to change the setting.
Need some soothing sounds at the end of a long day—but don't want the iPod on all night if you drift off? Have it sing you to sleep with the Sleep Timer function. Choose Extras→Alarms→Sleep Timer and then pick the amount of time you'd like: 15, 30, 60, 90, or 120 minutes. (You ...