Hi there! I want to do the following in my survey:

the user should at first see the question like this one: "You will now hear 2 melodies. Please decide wether they are identical or different"

the user should start the mp3 file by pressing a button ( i have done that in flash already), but here are the problems:

how can i realize that the mp3 files is only played ONCE?

how can i realize that he can only answer the question after he has completely heard the sound file and not during he hears that mp3??

Thank you for any helpful answer!!