As you may be aware, tracking LPs at to0 light a stylus pressure can cause a stylus to oscillate and tear up groove walls, causing playback distortion forever more, even though the disc looks pristine to the naked eye. I can only speculate that this can occur on shellac discs as well.
> On Mar 27, 2019, at 10:43 AM, Lou Judson <[log in to unmask]> wrote:
> Microscope? There are inexpensive ones now.
> Lou Judson
> Intuitive Audio
>> On Mar 27, 2019, at 7:31 AM, 6295LARGE <[log in to unmask]> wrote:
>> The records appear near mint, though I have no way of insuring that they're
>> not distorted anyway.