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Adrian, wouldn't another microscope problem - besides a light source - be the depth of field problem with the typical "one barrel" microscope?

Also, by "jagged edges" I mean in this case the sort of damage sustained by groove walls by any number of means, and for any number of reasons, including "plastic" formulae that are susceptable to fracturing or shattering even when used +/- as intended.  I think there are some old "styrene-type" LPs out there that are especially vulnerable to this sort of damage; certainly some vintages of some labels often sound like they are so damaged, even after "thorough cleaning".  And it also seems possible that some LPs simply do not come out of the mold intact; ie, they just start out "jagged".

Anyway, plenty of reasons why cleaning might not make the record quiet.  And I do not have a good enough handle on the "sounds of damage" to say exactly whether the source of the noise is dirt, leftover treatment or damaged "vinyl".  Being an OCD geek at heart, and naturally curious, I would have bought a stereo microscope a long time ago if they weren't so freaking expensive.

Best regards,
Paul S

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