[Engineer[_2_]]

On Feb 10, 11:41*pm, wrote:
On Feb 10, 1:54*pm, Engineer wrote:





On Feb 10, 3:12*am, wrote:

*Some time ago I rigged a turntable for variable speed operation using
an HP 200CD oscillator,

(snip)


*I don't know. I know Lyndon LaRouche was on the rag his whole life
over the fact that middle C should be 256 Hz instead of the higher
pitch A over middle C at 440 produces. He claimed to have deduced this
from paintings of choirboys singing with a candle in front of them! He
was, IOW, quite crazy.- Hide quoted text -

- Show quoted text -

A = 440 Hz implies a middle C = 261.63 Hz.
Middle C = 256 Hz gives the next higher A = 430.54 Hz.
Both based on each higher note being the 12th root of 2 times the one
below (they are 9 semitones apart.)
Someone check my calculation!
Cheers,
Roger