Im recently new to Head-Fi and on one late night lurking session, i thought i saw something about some CD that walks you through what sounds it is that you are hearing, with explanations on what each means and what to look out for from your gear. I could have imagined the whole thing as it was pretty late, and i have searched and searched, still to no avail. Does such a thing exist? Or was i Head-Fi dreaming?
Any help would be much appreciated.