Dear Joanna . In order to hear the audio files, you must fully open the powerpoint and you will hear the audio as its built in . The hyperlinks are for copyright purposes so that I can give credit to the persons who have had the ideas. You do not need them. I've tried it out at home . Please contact me again if there is some thing which you are not happy with or indeed you have heard the audio.. Remember that this work is given freely. The only "reward" we get is to communicate with people like yourself.