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Re: [ARSCLIST] 1937 shellac test pressing outperforms audio CD
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
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