As a data forensics person, I would simply rip a copy of each CD, and then do a bitwise comparison. Of course the results will be the same. I would even do them on completely different systems to demonstrate that no matter what, the resulting digital stream is identical. That's how digital recording works.<p>I definitely enjoyed his demonstration with inverted waveforms sampling. He proved it quite well after the DAC stage. A bitwise comparison of the ripped content would show they are the same <i>before</i> the DAC stage as well. The shaving and marking literally does nothing but cost you money.