I've got that tomorrow too! I'm really worried about the recording being muffled in the space of the hall and not being able to hear!
As useless as this is, my main technique is just to really listen and pick out every single word that i can. I try and translate it as it goes in my head, write down what i think, listen again and either confirm or change my answer.
I'm nervous but i've done every paper and revised all i can so let's hope for low grade boundaries!