Strike Tone not Yielding same beatspeed

[Richard Moody]

| > What is a "strike tone"?
>holding down the F2 and Ab2
>so their dampers are off the strings, then strike C5

Gadzooks what a gaff. (besides counting the partials wrong)  Ghosting.
(or sympathetic vibration)  Now I get it.  Here I am thinking C5 is
the "double 10th" of Ab2 and the "triple 5th" of F2.  "What does that
have to do with a minor 3rd".   Good thing I asked because otherwise,
"who you gonna call".  Obviously I was not trained in using ghosting
to tune.
    I never did heed the 6--5 3rds because they sound muddy to
begin-with and don't  test like the 5--4 3rd using the 5--4, 5--3,
5--2, 5--1 coincident partials.
    My piano being a foot and half shorter than a B has a very muddy
F2 m3.  But ghosting it with C5, the partials beat loud and clear even
though two of the unisons, Ab2 and C5 are out.  What a "swimmy beat".
Hmmm---makes you wonder how far apart strings can be before they can't
excite each other in sympathetic vibration and does this have anything
to do with "coupled motion" ?  Also I wonder if unisons can be tested
by ghosting.  ---ric

=============
    But come, fill a flagon, for it will crave sometime to tune the
harp; and nought pitches the voice  and sharpens the ear like a cup of
wine.   ------- Ivanhoe
=============






---- Original Message -----
From: Michael Jorgensen <Michael.Jorgensen@cmich.edu>
To: <pianotech@ptg.org>
Sent: Wednesday, May 30, 2001 2:18 AM
Subject: Re: Strike Tone not Yielding same beatspeed


| Hi ric,
|       C5 is the lowest coincident partial  or lowest common harmonic
| between F2 and Ab2.  The idea is that by holding down the F2 and Ab2
so
| their dampers are off the strings, then strike C5.   This starts the
| partial singing without adding to the tone or confusing the beat
rate,
| since C5 has a damper.  This technique is most useful to beginning
tuners
| to hear beats or locate partials more easily.
| -Mike
|
|
| Richard Moody wrote:
|
| > What is a "strike tone".   What is C5 supposed to do with the beat
| > rate of F2--Ab2?
| > Why C5?  Why  not C4 or C3?   Do these then produce differences
from
| > C5?   ---ric
| >
| > ----- Original Message -----
| > From: Michael Jorgensen <Michael.Jorgensen@cmich.edu>
| > To: <pianotech@ptg.org>
| > Sent: Tuesday, May 29, 2001 7:25 AM
| > Subject: Strike Tone not Yielding same beatspeed
| >
| > | Hello,
| > |      Steinway B,  F2-A flat 2 minor third tested using C5 as
strike
| > tone
| > | yields a significantly faster beat speed than listening to the
| > beatspeed
| > | by playing the minor third by itself.