Important Question, was lucky break

[David Andersen]

>Roughly, at 440, a 4 cents deviation should equal 1 hertz plus or minus
>fractions.
>So, in my case this afternoon, the piano being 20 cents sharp was at 445.

And if I may ask, how does that translate, ballpark, into beat speeds as 
you deviate from A440?
What is the beat speed of A441(piano) when compared to A440 (fork or ETD?)

Inquiring minds want to know......

David A.