FlashCards does support Audio. Check out the Children's Alphabet for an example.
Internet Required
An active Internet connection is required to play audio.
Recording Audio
You can record audio for your FlashCards using the Online Tools (read more). You will need a desktop computer running Windows or Mac and a microphone. Using the Online Tools you can record your audio for any card in your set directly from the management tools. There is no need to record it offline and then upload a file, it's all built right in. Best of all, it's free!
Recording Audio from this Device
Recording audio from your device is not yet supported, but will be available soon.
Audio Not Playing
If the audio play button shows but no audio is heard, try rebooting your device. Many time myself I have seen the audio simply stop working with no explanation why.