iTunes User Guide
- Welcome
- What is iTunes?
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        - How to add items
- Transfer purchases from a mobile device
- Import songs from the Internet
- Export music or video from other apps
 

Adjust the volume in iTunes on Mac
- In the iTunes app  on your Mac, do any of the following to play music or a video: on your Mac, do any of the following to play music or a video:
- To control the volume, do any of the following: - Change the volume for all songs (like turning the volume knob on a stereo): Use the volume slider at the top of the iTunes window.  - The maximum volume is limited by your computer’s volume setting. 
- Adjust the volume of a particular song or video: Select it, choose Edit > Song Info, click Options, then drag the volume slider. iTunes uses this setting each time the song or video plays. 
- Have all songs and videos always play at the same volume level: Choose iTunes > Preferences, click Playback, then select Sound Check. 
- If you’re using remote speakers connected to an AirPort Express: You can use the volume controls on the speakers as well as the iTunes volume controls. To use only the speaker’s controls, click the AirPlay button  , then select the tickbox next to the speaker. , then select the tickbox next to the speaker.