Is it possible to play a song even after the slides loop?

[Mihai_VRD]

Hello everyone, this is my problem:
I have a 47 slides presentation, the transition time for one slide is 10 s. I have a 200+ MB audio file that i want to play from start to finish and then loop regardless of the slides (they should loop too). I have searched 3 or 4 hours on the internet but no luck... Everywhere i searched i found answers on how to loop an audio file that is shorter than the presentation....my problem is that i have a audio file that is way longer than the 47 slides, and after the 47'th slide,when the show loops to the first slide again, the audio file starts from the begining, i want it to go on playing. Thank you. (sorry for any grammar mistakes)