In the past, I have done some side-by-side speaker cable comparisons with high quality, but mono, tracks from the likes of the Sheffield / XLO test & burn-in CDs. Much to my surprise, I found that one cable could make two drum sticks clicking against each other sound real, whereas the other sounded dead in comparison. The differences overall were small, and the music of which the drum stick clicks were a part, not particularly demanding (small number of instruments, one voice). I would like to try some other tracks, but most high quality recordings are, of course, in stereo. Can anyone suggest CDs that would be suitable for testing cables, or explain how best to go about creating / burning such test CDs?