The sound for all movies is embedded directly within the movie itself. Thus, if you see the movie playing, there is sound being transmitted with it. You can try the following if you don't hear any sound:

If you don't hear any sound for any of the movies, try the following:

1. Verify that the volume on the movie is high enough to hear. Slide the gray box to the right to increase the volume.
2. Next, please bear with us for a moment and please verify that you have computer speakers and that they are turned on. (STEDI.org Technical Support finds that this is the most common problem.)
3. Verify that the volume is loud enough on your computer speakers by checking the manual control knobs on the speakers themselves.
4. Verify the volume is loud enough in the sound preference options of your operating system:

Microsoft Windows

• Click "Start" then "Control Panel" then "Sounds, Speech, and Audio Devices". Then under "Pick a Task" click "Adjust the System Volume".
• Verify that the volume is loud enough.
• Verify that the "Mute" option is NOT CHECKED.
• Click the "Advanced" button.
• Under "Master Volume" verify the volume is adequate and that the "Mute all" option IS NOT CHECKED. If you're wearing headphones, be careful not to blow out your ear drums by turning the volume up too high.
• Under "Wave" verify that the volume is adequate and that the "Mute" option is NOT CHECKED. Be careful here too.
• Close this dialog box by clicking the "X" in the upper-right of the dialog box.

Mac OS

• Press the F12 button to turn up the volume. (Be careful when wearing headphones to not turn up the volume too high.)
• If that doesn't work, in the menu bar click the "Apple" icon then click "System Preferences".
• Click the "Sound" icon then click the "Output" tab.
• Verify that the "Output Volume" is adequate and that the "Mute" option IS NOT CHECKED. (Again, be careful when wearing headphones to not turn up the volume too high.)

If that doesn't work, then try the next section:

If you hear the sound in at least one movie but not all of the movies, or there are other issues with the audio, try clearing the cache in your browser and reloading the page. To clear the cache in your browser, do the following:

Internet Explorer 6 & 7

• From the main menu, click "Tools" then "Internet Options".
• NOTE: If you don't see the main menu, you may need to press the "Alt" key for the menu to appear.
• From the dialog box, under the General tab, click the "Delete Files" button under the "Temporary Internet Files" section.
• Make sure the "Delete all offline content" is checked.
• Click "OK". (This may take a few minutes to process.)
• Click "OK" again to close the dialog box.
• Refresh the page and login again.

Internet Explorer 8

• From the main menu, click "Tools" then "Internet Options".
• NOTE: If you don't see the main menu, you may need to press the "Alt" key for the menu to appear.
• From the dialog box, under the General tab, click the "Delete" button under the "Browsing history" section.
• Make sure the following options are checked/unchecked:
• Click "Delete". (This may take a few moments.)
• Click "OK" again to close the dialog box.
• Refresh the page and login again.

Firefox 3.0

• Click "Tools" then "Clear Private Data"
• Make sure the following options are checked/unchecked:
• Click "Clear Private Data Now".
• Refresh the page and login again.

Firefox 3.5

• Click "Tools" then "Clear Recent History"
• For "Time range to clear:" select "Everything"
• Click the arrow next to "Details" to show the following:
• Click "Clear Private Data Now".
• Refresh the page and login again.

Safari 4

• Click "Safari" then "Empty Cache"
• Refresh the page and login again.