On Friday, April 03, 2009 9:34 AM, Richard L. Hess wrote:
> A few years later, someone -- I think it was published in > audio -- had taken a scanning electron microscope to these > very same CBS test records and, low and behold, there was > RINGING recorded in the grooves! I wish I could find that > article again!
Richard, thanks. Funny, but last night I met someone who has her own scanning electron microscope (SEM) in her *garage* (only here in Silicon Valley). It is an older SEM - about 15 years old, hence the size. If it turns out that my cartridge is not ringing, then I very well may put the disc under an SEM.
I have most of the CBS test records. Do you recall which test track you observed the ringing upon? Square wave perhaps? I may have to put that test record under the SEM and see if I can reproduce the test results of that publication.