(1.) someone told me, if I use analysis software (in general) that it doesn't work with analogue sources (i.e. studio/live recordings that maybe were first released on LP and then later for CD). I mean I can imagine, that it would interpret "noise" (hizzing?) as music and give wrong results...
but, if there is little noise in the recording they made the digitalized CD version of, would that be usable?
(2.) What parameters would be affected by analogue sources and what not?
(3.) I guess tempo will not be a problem, if there are no cracks that could be misinterpreted as beats in the recording, right?
(4.) Analysing the pitch could be a problem, right?
(5.) Dynamics would be a problem, right?
My questions are in regard to classical music (a Symphony).
I added numbers, so people can answer easier, if they don't want to quote.