The most common reasons include:

• Your device software may be out of date. Please see: How can I check if my software is up to date?
• You have lots of apps, tabs, or programs open. Please close any apps, tabs, or programs not currently in use.
• You may need to restart your computer.

Mobile Devices

• Try pushing the "restart" button below the slide.
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• iPhone: There is a ring/silent switch on the side of the device. Try turning it to the "ring" position. Click here for instructions from Apple about this.
• iPad: Make sure your Ringtone and Alert Volume is not disabled in the Settings. Click here for instructions from Apple about this.
• Android: Check under the Advanced section in Sounds and Vibrations settings for Separate App Sound devices being set up. The audio will attempt to play there instead of on your device.
• Android: Check under Accessibility / Hearing and make sure "Mute all sounds" is off.
• Sometimes people accidentally have bluetooth headphones connected, and the sound is playing on the headphones instead of through the speakers.
• Occasionally, students have had success by using headphones when they could not otherwise get the sound to play.
• Clearing the browser cache sometimes helps with sound issues.