Taking the N5: question about the audio portion

I'm going to take the N5 this December.

Here's my question:  during the test do they let you re-listen to the audio clips over (and over) again if desired, as time permits?  Or do you get to hear the audio only once, and if you miss something too bad.

You'll only hear it once!
They only play the audio once, using a CD player in the front of the room. Usually they ask if everyone can hear the example sentence clearly before they proceed to the real listening questions. Granted, things may differ between test sites a little, but they should still only play it once, so take notes during the listening section if that helps.