Once the survey is ready and it has all the questions and voice-over files there is an option to replay the files to make sure that correct files are uploaded.

Important: The survey should be saved before you can play voice-over files.
To play a voice-over file:
- In the Questionnaire Manager, double-click the survey you want to check.
- Click Play icon next to the question you want to replay.
The player at the bottom of the page allows to control currently playing media file.