If the slides flash too fast and there are no sounds at all, it means your computer may not have enough processing power to keep up with the speed of slide transition. We suggest you try to adjust the delay of the slide transition or turn off the auto-forward setting.

For instructions on how to do this, please visit this article:

How to change the speed of your lessons in Little Math (slide transition)

If the solution above does not work, please try using the Audio Diagnostic Tool. For instructions on how to do this, please visit this article:

How to use the Audio Diagnostic Tool