I know that there are laser scanners at the cost of a small car. But what about DIY?
The resolution of common household scanners should already suffice to do that. The only problem is that the groove's information is encoded spatially, and household scanners cannot capture z-axis information directly. Basically it should be decodable, though, because of the groove's uniform nature. The depth should correlate to a V-shaped gradient. Has anybody ever thought or heard about this in detail?
There is a turntable using a laser instead of a needle: http://www.elpj.com/
In 2002, Ofer Springer, an Israeli physics student, did just what you're suggesting- trying to make music out of scanned vinyl LPs. "The results are barely recognizable as the original music, but strangely affecting," according to a Wired Magazine article on his efforts.You can listen to Ofer's samples on his web site and see his scanned LP images.
Of course MRI would not work on a non-magnetic disc...
Quote from: Roseval on 18 March, 2010, 07:45:09 PMThere is a turntable using a laser instead of a needle: http://www.elpj.com/yes, and if the record isn't spotless, the laser will read dirt as noise, just as a needle would.