I'm pressed to imagine a new "protocol" for an analog recording on a surface. That's more of a digital domain concept. I suppose there could be some shocking new advance in the recording circuitry, though that doesn't seem too likely. Aluminum, especially are harder alloy, would possibly allow more precise "peaks and valleys" to be cut into the sides of the groove which with the proper equip could increase resolution. I'm not ready to start smearing their reputations until I understand more about their idea. I'm stupid, but not that stupid.