 |
 |
On 06/21/2012 07:39 AM, Steve Smolian wrote: > > Needle in groove playback still sounds better. I assume they are also > working on improving their digital modeling of the physics of playback. > I'm a lay person so I may be talking out of my hat, but it seems to me that one obstacle they are possibly facing is the fact that the groove of a disc is modulated in an arc rather than a straight line. When the software digitally straightens the groove, the distance between the peak and trough of the lateral waveform will be microscopically shortened along the outer wall and lengthened along the inner wall - and the factor will be constantly changing, because the radius is constantly changing. I don't know how much doppler-like distortion this might introduce, if any. With something like the Berliner discs, I don't think anybody cares. These are voices that have been locked away for nearly a century and a half, and we're happy to be able to hear even a faint ghostly image marred with the grain and dirt of the paper, possibly even the grain of the zinc master, and other factors. But with a musical record, this would seem still a bit of a challenge. In theory, anyway. At least to this admittedly unschooled mind. :) Michael Shoshani Chicago