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

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.

Pre-echo is evident throughout the record, if there is a loud passage preceeded by a soft passage.

I see, so you only hear it clearly when there is a loud passage preceeded by a soft passage...but does that mean it doesn't matter except in these instances?

Shadorne...A heavily modulated (loud) groove will always affect adjacent grooves, before and after, throughout the LP. It is always audible during the silent (supposedly) first groove of a cut but is masked by the music at other times (but is still there as "noise").

If you have an LP of Beethoven's fifth, that would be a good one to check for pre-echo. It begins with loud chords.

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.

Tbg...You really don't need a "low noise system" to hear pre-echo on the first grooves of an LP. But, for the rest of the LP the program material (which for purposes of hearing pre-echo) might be considered as "noise" will make it impossible to hear. But it is still there, which ought to give the vinyl perfectionists fits.

Pre-echo on a CD is hard to understand, unless the CD was remastered from a vinyl recording. Certainly any digital master tapes would not have this problem. If there were pre-echo from print through of a mag tape, this could easily be edited out when the CD data file was created.

Can you cite a CD with pre-echo so that I (we) can check this out?