Twl...You make sense. Mostly.
The Nyquist criteria calls for sampling to be at twice the highest frequency of interest: if this is true the analog waveform is represented without error. BUT...Nyquist was talking about sine waves. Music is not a sine wave. That's why the CD sampling frequency of 44.1 KHz is not adequite. In my experience (non audio) sampling at about four times the highest frequency of interest was useful. (Higher a waste of time).
Analog recordings TRY to reproduce the signal in a continuous manner, but HF filtering gets in the way. A LP can be "read out" with an optical microscope instead of a phono pickup. A few exceptional recordings have groove modulations up to 22 KHz. If the wiggles are not in the vinyl you can't say that the audio system responds.
The Nyquist criteria calls for sampling to be at twice the highest frequency of interest: if this is true the analog waveform is represented without error. BUT...Nyquist was talking about sine waves. Music is not a sine wave. That's why the CD sampling frequency of 44.1 KHz is not adequite. In my experience (non audio) sampling at about four times the highest frequency of interest was useful. (Higher a waste of time).
Analog recordings TRY to reproduce the signal in a continuous manner, but HF filtering gets in the way. A LP can be "read out" with an optical microscope instead of a phono pickup. A few exceptional recordings have groove modulations up to 22 KHz. If the wiggles are not in the vinyl you can't say that the audio system responds.