pRCT got ears again! was S.O.S. my pRCT has gone deaf!!!

[Mark Schecter]

David Ilvedson wrote:
 > They used an A440 fork to tune A3 (temperment starting point)
 > F3 - A3 = F3 - Fork.
 >

Hi, Dave.

Well, call me old fashioned, but this tunes the fourth partial of A3 to 
the second partial of the fork (±880), which would only yield A4=440.0 
by luck. They are introducing two variables; the distance between 
partials 1 and 2 of the fork, and the distance between partials 1 and 2 
of A4. The sum of those differences, unless by chance it is 0.0, is the 
_offset_ of A4 from 440.0. At least, that's the way I figure it.

(Whether it makes a hill of beans worth of difference is a separate 
question.)

-Mark

Here it is again in step format:

1. F3-A3 beats at 5:4 (A5, 880)
2. F3-Fork beats at 5:2 (A5, 880)
3. Match 1. and 2. and you've tuned the 4th partial of A3 to the 2nd 
partial of the fork.
4. Tune A4 to A3 matching 4:2 (third-tenth is equal), and you've tuned 
the 2nd partial of A4 to the 2nd partial of the fork (=A3), assuming 
step 3. was accurate.
5. What have you tuned to the 440 fundamental of the fork? Nothing. You 
have not used the fundamental in this process.

To borrow a phrase, sheesh.