Jitter, Linearity ... part of orig Red-Book specs? 2011-09-23 11:35:16 The audio community, at least as far as the pop magazines like Stereophile and Audio are concerned, started measuring and tracking (TTBMK) linearity and jitter several years after the consumer-version CDDA format (aka Red Book CD) appeared. I think I first encountered linearity in 1987 and jitter in 1990 (rough estimates on both).I don't know if both of these parameters were specified in the orig. "Red Book" spec. sheet. Anyone know? If not part of orig. spec, what led to the "discovery" of each? Were they important (being tracked, measured) in the pro (recording) arena before consumer stuff? Seems like impulse response is the latest of these Johnny-come-latelys -- i.e., wrt the infamous pre-ring and minimum-phase (or apodizing?) filtration. True ... a lot of it (i.e, the spec Zeitgeist) is marketing hype -- certainly, linearity was. Maybe jitter was evolutionary, rather than revolutionary. IAC, if digital indeed has a long sonic way to go before it better simulates the natural acoustic, what is/are the best scientific method(s) that lead to the knowledge-discovery of these new "parameterized" phenomenon ... phenomenon in Nature that importantly affect and improve digital state-of-the-art?