The frequency range matters too.... the two I mentioned are examples of massive sub bass peaks. A CD can handle that, but try that on an LP at the end of the side (like both of these examples) and it's a recipe for trouble. Mercury and Telarc were among the few record labels back in the day that were willing to try putting untrackable grooves on a record. I don't think there was a turntable on Earth that could track that Telarc tympani hit. You could see it clearly by looking at the grooves. All of a sudden there's a groove that looks like the Grand Canyon compared to the other ones!