Creat a global variable "Randomeaudio"- set condition as on every loaded layout Choose(1,2,3,4,5)
then add another condition
if Randomeaudio is equal to 1 play sound 1
if Randomeaudio is equal to 2 play sound 2
if Randomeaudio is equal to 3 play sound 3
if Randomeaudio is equal to 4 play sound 4
if Randomeaudio is equal to 5 play sound 5
and so as per number of audio files you want to play!
hope i answered your question!