I'm assuming you're referring to the videos in the tutorial--yes, they all have audio. Do you see the video player at all?
It may be a glitch in Google Chrome because it plays on my iPad- in Google Chrome it plays but there is no sound
Good to know, thanks for updating!
Please email me with details regarding your OS, Video card, etc. It will be good if you can also provide a contact number and a convenient time you may be reached. We'd like to help you track down the source of this problem.