.aiff file

[Dean Masters]

Someone sent me a file that is in the .aiff format. He also sent the file in 
garage band format. I have a windows 7 64 bit PC. Is there some program I 
can use to play or convert either file? I need to listen to this file this 
weekend to learn a song for barbershop chorus practice on Monday.

Or is there a web site where I can convert the file?
Thanks,
Dean