How can you be such an ASS and say that amplitude and frequency are
analogous? You have to be a total clueless idiot to even think along those
lines. Perhaps you were better off with Heath-Kits.
west
"Eeyore" wrote in message
...
John Byrns wrote:
Peter Wieck wrote:
John:
Whoops: http://www.graniteaudio.com/phono/page5.html
should get you there.
For the record: Whatever positions and suppositions you may take, and
from whatever point of view, whichever cutting head and system, the
actual subject-at-hand is the *present* RIAA Curve as practiced each
day. This is presumably a fixed value both on recording and playback.
That curve is at the bottom of the article. The Bass Boost and the
Treble Cut on playback cross the Bass Cut and Treble Boost on
recording at ~1.2Khz.... not quite what you are writing.
References are at the bottom of the article.
Peter, this article assumes that a "magnetic" pickup is being used to
reproduce the LP. "Magnetic" pickups do not respond directly to the
amplitude of the signal recorded in the LP's grooves and requires
compensation.
Let me attempt to explain, I'm going to assume that you have some
knowledge of math and know what differentiation is.
Why makes it so complicated ?
The magnetic pickup responds not just to the amplitude of the signal in
the
groove but it's rate of change too.
So a signal of the same amplitude on the disc at say 2kHz will produce a
voltage
at the pickup that's twice what it would be at 1kHz.
Graham