12" 45 RPM records: What's the story?

I think that pre-echo is ever present. A low noise system will unveil it. I have been listening more for it lately and have heard both on lps and cds. I maybe that good practices with the magnetic tape and important. As yet I have not heard it on any sacd.

Yes, reissues 45s are better than their 33.3 originals. More dynamic and transparent. They take two records to equal one record in 33.3 and thus why they were not issued that way. LPs were issued because they could provide 30 minutes of music per side.

Pre-echo is evident throughout the record, if there is a loud passage preceeded by a soft passage. I must also say that I have one cd with pre-echo, but it is a reissue with remastering, so it could be magnetic transfer.

I view pre-echo as one of the liabilities of vinyl like pops and clicks or noisy vinyl on 70s records.

Nsgarch, the preecho is in the other channel in the groove that has already been cut. The cutter cannot deform the vinyl in the groove yet to be cut.

What I would really like to know is how I get preecho on cds which are cut from the master tapes.

Eldartford, I am gathering a number of cds and the tracks showing pre-echo.