Right, but he's comparing his 12" single with the digital transfer he made himself with his gear and blaming the differences on "digital". Any differences are of his own doing, not due to "digital".
Yeah: my post was more directed at the general topic and some other posts.
It's not entirely clear to me exactly what two things the OP is comparing, or how he's doing it.
One of them is described as:
"12 inch single we made back in 88 when played back through my pc sound system"
"the actual sound of a 12 inch vinyl single."
The other:
"pure digital recordings we have also mastered,"
"digital replica was made using a Pioneer turntable and a Teac amp, both of some vintage, 1978 or so recorded into Ableton 8. Then it was level mastered only and saved at 44.1Khz"
"level-only mastered digital copy"
I'm rather confused by the fact he said he's playing the vinyl through his "pc sound system." Presumably he's using a turntable and a phono preamp, most likely the one in the TEAC amp he mentions.* I'm not sure how (or why) it then gets into his PC sound system, and whether that means he's digitizing it anyway. I'm also unclear from what and how (and even when) he made the digital copy.
Personally, when I make a digital copy of a vinyl record (which I've done many times), I can't tell the difference between them (except where I have worked on the digital recording to remove pops and the like, when the digital one sounds better).
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*Did 1978-vintage TEAC amps have preamp outs? My memory is they didn't: that was more a feature of higher-end (and later) audiophile-esque gear, which would have little U-things on the back to bridge the RCAs for the preamp outs to the amp ins.