Is there any sort of program that will analyze a WAV file of modem > sounds?
Yes.
At least 27,389 of them, in fact. *grin* No, I'm not going to list them for you. :)
It all depends on *WHAT*YOU*WANT*TO*DO* with the file, which you couldn't be bothered to specify.
Now, my crystal ball has been behaving somewhat erratically lately, so what follows may not be at all relevant to what you "really" want to do.
If you are hoping to be able to recover the 'bits' of the digital data from a 'conversation' between two modems, this is
*virtually*impossible* for an 'standard' modem connection with an analog-side speed above 2400 BPS. For _most_ 1200-2400 baud, it is merely 'very difficult' -- unless it is a half-duplex controlled-carrier communication. On the other hand, for the 'trivial' modulation systems commonly used at speeds below 500 baud, it is fairly straihtforward to do. simple differtial analysis of the output of a pair of properly tuned high-Q 'narrorow-bandpass' filters (sometimes called 'notch' filters in a different application) will extract the digital data.