Linda~ I'm afraid this may be a problem with the quality of your iPad speakers rather than the classes' sound. To fix this, you could get some external speakers to attach to your iPad which would up your device's volume capabilities.
It is not working for me either. It is not an issue with the iPad speakers. I have done classes with the iPad speakers alone before and it worked fine. I am getting absolutely zero audio output. I am going to unsubscribe.
For me I can get most classes. The 30 day challenge has some instructors I cannot hear very well at max. sound that is all. I love the classes and truly use them most days.