Anecdotally, I think you can hear the difference when burned at 24x vs. 8x. 8x sounds better but to my ears, not as good as identical discs I burned at 1x or 2x on external Yamaha burners in the past. It could be different media accounting for it, but I am interested in trying to get my Mini to burn at 1x or 2x to compare. The only reason I notice is that I make batches of "test" CDs for comparing stereo components so I tend to listen to the same disc across many burns.