This article isn’t about mastering a CD so that the songs are all at the same perceived volume, it’s about getting your music collection to play back at reasonable volumes relative to each other. It’s also about providing this feature to your digital distribution customers.
I’m sure you’ve at some point put your music collection into shuffle play only to find that the transition from Rachmanninof’s Symphony #2 into Marilyn Manson’s Mechanical Animals is enough to make you piss your pants. You aren’t alone. The audio geekery community has come up with a solution to the problem of CDs having drastically different volumes: ReplayGain. Apple has their own solution they call Sound Check, although by most accounts it seems to be less sophisticated.
