If the progress bar at the top of the iTunes window is moving but you don’t hear anything, check the following:

• If you’re trying to listen to music through your computer’s built-in speakers (or powered speakers connected to your computer), make sure the volume control at the top of the iTunes window isn’t turned down, and that your computer’s output volume isn’t turned down (in the “Sound and Audio Devices Properties” control panel).

• If you’re trying to listen through powered speakers connected to your computer, make sure the powered speakers are properly plugged into your computer’s audio port, plugged into a power source, and turned on. Also make sure their volume isn’t turned down.

• If you can’t use the iTunes volume control because it is dimmed, make sure Computer is selected in the pop-up menu at the bottom of the iTunes window, and that “Disable iTunes volume control for remote speakers” is not selected in the Devices pane of iTunes preferences.

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• If you’re trying to play music through remote speakers using AirPort Express, and “Disable iTunes volume control for remote speakers” is selected, make sure your remote speakers are selected in the pop-up menu at the bottom of the iTunes window, and that the volume control on the remote speakers isn’t turned down.