coupled motions

[Joe & Penny Goss]

Don,
Interesting VVVVery Interesting. Did you also check the level of hammer to
string to eliminate wave distortion of the sound?
Joe Goss

----------
> From: Ron Nossaman <nossaman@SOUTHWIND.NET>
> To: pianotech@ptg.org
> Subject: Re: coupled motions
> Date: Saturday, November 07, 1998 6:08 PM
> 
> At last, something technical. This is interesting. I've often wondered
what
> I was actually getting away with in tuning unisons. How far into the tone
> did you tune? Were you giving it a second for the attack to coalesce, or
> hitting the key quickly and continuously as you tuned? I'm thinking that
> after the first half second or so of the attack, the note gets cleaner as
> everything pulls together. I have found that attack distortion lessens as
> the unison is better tuned, so I get better unison tuning in the attack,
> than I do in the decay. Did you try it the other way and tune each
> individual string as perfectly as possible with the RCT, muting the
others,
> and measure the pitch of the resulting unison?  
> 
> I'm also curious as to what factors determine how much tuning divergence
> will pull together to an 'acceptable' level. String termination and the
> impedance of the bridge/soundboard assembly would surely affect this, as
> would the frequency, I would think. You probably have a tentative
hypothesis
> about what you've got so far, so what do you think?
> 
> Ron
> 
>