Change the System Sound Format for Presentation
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When the audio format set in Presentation does not match that set in the system configuration you will typically get an error:
The solution can be to either change the Presentation settings (BEWARE: match these to your actual audio files or you risk misrepresenting them to your participants!) or change the system settings.
System settings can be changed by going to START >> Control Panel >> Hardware and Sound >> Sound >> Tab: Playback >> Select: (active) Speakers >> Properties >> tab: Advanced >> then select the correct format from the dropdown menu and hit Apply.