(Paddy) in
uk.rec.audioaaba1f61.0411191806.4a123e5c@posting. google.com:
: Theoretically at least, you should be able to scan the grooves with a
: laser micrometer arrangement and make a computer model of your LP.
: You could then process that map to extract the wav content of the
: sound.
:
: Your biggest problem might be in choosing an encoder to convert the
: wav to mp3.
:
: Interesting idea...has anyone actually accomplished this?
:
: Yes...
:
: http://www.elpj.com/
: The ELP Laser Turntable (laser gramophone ;-) ).
:
: That's the one. But the technology can't cope well with the usual
: vinyl imperfections.
: What I would like to do is scan the groove to a CAD image. Correct
: that image manually, and then convert the image to wav. Naturally,
: when I say manually, I mean with a good suite of editing tools.
Don't expect to fit the device into your living room, though ...
http://www.newscientist.com/hottopic...=Hot%20Stories
"So researchers at Lawrence Berkeley National Laboratory in California,
US, adapted a sensitive instrument used to build a colossal particle
accelerator as a highly sensitive optical recording method.
"This enabled us to develop a non-contact way to measure delicate records
without the need for much operator intervention," says Vitaliy Fadeyev
who developed the technique with colleague Carl Haber. "It also has the
potential to digitally reassemble broken discs."
[ .. ]
"The researchers have shown that the technique can faithfully restore
some extremely rare recordings to their former glory, including the 1950
recording of "Goodnight Irene" by Huddie "Leadbelly" Ledbetter.
The team have released two audio clips (Windows Audio File format) to
highlight the difference between the recordings before and after the
optical technique was applied."
--
There's a couple of wavs to compare,1.59MB & 1.61MB.