ellisdj said:
I would need to get them to you some how - thats an potential issue there.
you don't need to, can all be done on your computer.
just use diffmaker http://www.libinst.com/Audio%20DiffMaker.htm
So, take one file on your music pc, copy that to an external hard drive and then back again. Call that file something different. Then put the original none copied file in to diffmaker along with the copied file. If you are correct and the sata cable is changing the file (as it would have to in order to have an effect on the sound) then it should come up with differences. If no differences come up then the sata cable is having absolutely no effect on the sound whatsoever.