Text Speaker creates audio narration in a pleasant, human-sounding voice. For stories with different characters Text Speaker allows the use of multiple voices. Using multiple voices will make your story more interesting and enjoyable. Use the male and female voices depending on the characters in your story.

You need to insert a special voice tag within your story document, Text Speaker will switch to the other voice as soon as it reaches this tag.
An example of a voice tag is <voice required="name=Mike16">



The other suggestion is to use pauses in your story appropriately. Put the cursor at the position where you want to add a pause of a certain length. Click Edit >> Insert Pause.