"Keith G" wrote in message

"Stewart Pinkerton" wrote in message
...
On Tue, 26 Oct 2004 15:05:27 +0100, "The EggKing"
wrote:

Stewart's last post made me think (extraordinary as that sounds);
Does the fact that a Vinyl single spins quicker mean the sound is
more defined? As you're covering more distance with the same amount
of information you can get better definition, i.e.. your higher
frequencies appear longer on the faster spinning record and are
therefore easier to pick up. Does this make sense and is it true?

Yes, although not 'definition', just more extended treble,

Bull****.

Definition woudl be a synonym for resolution which is mathematically the
same thing as dynamic range. Thus the question simplifies to whether or not
a faster spinning disk has more dymanic range. Magnetic cartridges are
velocity sensors. For a given angle of displacement of the stylus, the
faster-spinning disk is going to produce more output. Going the other way,
dynamic range has always been a well-known limitation of 16 2/3 rpm disks.

However, dynamic range is not solely determined by maximum output, as will
be covered below.

hence the
existence of 'audiophile' 12" 45s by RCA and others. OTOH, surface
noise is higher,

More bull****.

Surface noise on LPs is caused by dust particles. A faster-moving dust
particle is going to impinge more strongly on the stylus, creating more
output. Therefore, surface noise can be expected to be higher on a 45, all
other things being equal.

If the noise floor of a LP is dominated by surface noise, both maximum
output and the noise floor are controlled by speed for zero net gain in
dynamic range.