Your vinyl was pre-digitized 2014-04-10 16:57:13 It seems that starting in the late 1970s and right on thru the 1980s, mastering/cutting lathes were using DDLs (digital delay lines) for purposeful reasons.According to some in an ongoing discussion on the gearslutz.com forum, it is quite possible that the MAJORITY of vinyl releases (roughly in the 80s) were actually pre-digitized.Majority because DDL was an economical and practical choice for major media companies. For the pro gear (the cutting/mastering lathes), the DDL modules may have been like a Dolby circuit.I'm no expert on this issue. Go thru the gearslutz discussion (starting roughly here) if you're interested in the topic. (Note: it's quite a long and growing thread, not originally on the topic of DDL, but it morphed into that) This is not really a new discussion topic. This 2009 thread, for example, on sh.tv is also topical and lists mastering houses that do not use DDLs.Refs:http://forums.stevehoffman.tv/threads/is-n...digital.273233/http://forums.stevehoffman.tv/threads/when...roduced.266485/https://www.google.com/patents/US4348754(1980 patent filing by Ampex Corporation) Excellent tech info on bit depth and sampling rate here!