Correcting Dolby A recordings on CD releases
A certain gentleman by the name of John Dyson has made it his mission to correct the bright, scratchy and otherwise awful sounding early CD releases.
He has discovered that many original masters were recorded using Dolby A but not decoded when layed down for CD release. To add insult to injury many of these were also subject to "Wall of Sound" or "radio friendly" adjustments without decoding from Dolby A at any point.
He has been creating a complex programme/algorithm ( still ongoing ) aimed at correcting these incorrect CD releases to bring the music back to or at least much closer to, what the musicians and producers originally intended.
The story has been unfolding on a couple of forums with before and after samples/tracks available for download and constructive criticism.
To save rehashing all the blurb here I will give the links to the forum I follow for this ( I hope that's OK Dave, if not simply delete this ) and let John explain for himself, along with reactions to his efforts. Some of the older links within to samples may now be dead but the more recent ones are still there.
The beginning and explanation
Some ongoing information and music
Most recent and more developed
Check it out for yourselves and see what you think.