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

What's the advantage of producing these? If there is one, why aren't they all 45RPM?

pawlowski613211-21-2006 5:37pm

onhwy61 Details Discussions Posts This discussion Message User 5,134 posts 12-12-2006 at 08:48pm Copy Comment URL Report Comment Edit Delete Nsgarch, go to this link and scroll down to the section about disc cutting. It will explain adjacent groove deformation due to a number issues involved in the cutting process.
onhwy61 Details Discussions Posts This discussion Message User 5,134 posts 12-04-2006 at 08:06pm Copy Comment URL Report Comment Edit Delete 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. Eldartford, how would one go about eliminating pre-echo/print thru not just before the first notes, but the entire album during a transfer from analog to digital formats?