[ScottW]

Sander deWaal wrote:
"Arny Krueger" said:


I believe that actual resonance or vibration of the LP is a very minor
effect. I don't believe I've ever seen any meausrements of it. Not that LP
playback is not rife with resonances, its just that the other ones are far
more significant.


Just because tire- and wind noise at higher speed far exceeds the
vibrating sound of a loose plastic interior part in a car, it is still
worth the trouble to fix the latter IMO.

Imagine the magnitude of movements of the stylus, and then reflect on
the magnitude and influence of disturbing vibrations and resonances.

Indeed there seems to be very few "research" done about this, if any.

Because it would be extremely problematic to conduct.
Vinyl is too soft to transfer any but low frequency vibration over any
distance.
Hard to understand how a clamp at the spindle will significantly effect
the resonance
of the vinyl at the records edge....I suspect it is far more likely to
change the response of the entire structure including platter.

As far as research....thats a real problem....one would need an
accelerometer very near the stylus to see the response. None are small
enough and obviously keep them near the stylus is a real problem.
Perhaps a non contact laser measurement system just might be what is
needed to see if there is any significant vibration/resonance induced
by the stylus contact.
I still don't think there can be....if there was....it will be huge at
the resonant frequency of the record/vinyl.....which would change
dramatically with record thickness. And while audiophile albums of
180G and 200G are common they don't exhibit extraordinarily flatter FR
than a thin record. Some of my Half Speed masters aren't thick and
they sound great.

I've tried a record clamp (really just a weight) and I decided that I
didn't hear anything and I didn't wan't the extra weight on the platter
bearing. Bearing noise might also be a small factor influence by the
clamp.

ScottW