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

Sorry Eldartford but if we want to form a company then we should have thought of this more than ten years ago and filed a patent.

A cursory investigation indicates we might have to negotiate a patent license or find a workaround....

French Telecom Patent on Pre-Echo

Somebody already thought of it.....I knew it was too obvious!

Of course, if we just made the science up and sold a brightly colored interconnect exactly 1.8 meters long (get it - the perfect length to cancel the pre-echo); we wouldn't have to worry about a patent license...just rely on testimonials!

Did anybody find a CD with pre-echo yet?

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.

Tbg...You are correct about disturbance of the subsequent groove. Even if the recording media were upset by the cutter it would be "overwritten" when the cutter came by.

As for CDs with pre-echo, name one.

If the original source is analogue tape, the tape can have print through that will sound like pre-echo in any subsequent playback media.