Once you add dialog to your characters using phrase lines you need to select the right speaking voice for that character. Please follow below instructions to select the right voice for your characters.
1. Below your characters click the drop down below Speaking Voice and select the right speaking voice from the drop down list.
Or click ADVANCED SETTINGS.
2. Click the drop down under Voice and select the right speaking voice for your character. You can also adjust Voice Volume and Voice Pitch in Advanced Settings. When done click SAVE AND CLOSE to apply changes.