I understand why you say that but if the recording device used to make the recording; be it CD or Vinyl, does not have that information on it because it is rolled off; then do we still hear it? So the recordings that have information below the lowest fundamental; are there many of them? I know thats not the case for vinyl but maybe CD's have good information down there. Maybe you can answer this; does the lowest note on the string bass have harmonics below that frequency? How does that work?