Adding Audio to Engage increases the File size

Hi

We have created a new Engage interaction (Tabs) with  screen shots from a webpage.This interaction contains 2 tabs and two screen shots(PNG files60 and 80 KB each).  

As soon as we add voiceover of 1.33 mins and 53 seconds in each tab , the entire Engage Interaction file size shoots to 8 MB.

This is the smallest engage interaction with two tabs.  We have another such 5 engage interactions in the next slides, the biggest being of 10 tabs.

This will increase the overall size of the training course.  We want the file size to be lower so that the download of the course is fast.

Let us know how we can reduce the file size of the engage interaction.

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