@ chinarabbit2008 , Changing the extension doesn't help. I think this is because of the compression level of an .aa file .
A small .aa 11 MB is 66 MB when converted to a .mp3 .
I don't have iTunes & have no plans to install it . I've read it works & from the link it looks like it works similar to Nero . You use it to burn an Audio CD & work with that CD.
Here's a list of programs that can't VLC player , WinAmp , Audacity , & MPC-HC .
Some of those might with some settings adjustment or plugins.
WMP does I beleive this is due to directshow codec.
With a good sound card the cable method might work . I didn't test it .
The problem with that is it has to be done in real time.
I think the majority of people don't have Audition but Audacity should work .
Same with the Gold Wave for those that installed it .
The reason for using dBpowerAmp is this method is free.
It is also much quicker than a real time recording with a cable .
That also takes some adjustment to make sure the record level is not too high .