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#639743 - 01/29/09 05:42 PM unison tuning
kordichb1 Offline
Junior Member

Registered: 01/21/08
Posts: 13
Sometimes when I tune a unison beat-less to the fundamental, I hear beats in the particles. Would you tune the partials beat-less or somewhere in between. Is there a way to get both the fundamental and particle of a unison beat-less? Is there something else that I am hearing?
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#639744 - 01/29/09 06:06 PM Re: unison tuning
Gene Nelson Offline
1000 Post Club Member

Registered: 09/10/04
Posts: 1895
Loc: Old Hangtown California
Normally when there is a discrepancy like that you are tuning wound bass strings. This is due to flaws in the string/s or slightly different strings in the matched pair.
In this case the only way to resolve the problem is to either tune the beating partials that have the most volume beatless and or tune somewhere inbetween so the note is the least offensive.
Plain wire can also give similar problems if the wire is damaged, kinked or there is a bad termination.
PTG Member

#639745 - 01/30/09 12:09 AM Re: unison tuning
Erus Offline
Full Member

Registered: 12/26/07
Posts: 386
Loc: Mexico
Could grooved flat hammers be considered a significant source of "noise"?

#639746 - 01/30/09 07:15 AM Re: unison tuning
UnrightTooner Offline
5000 Post Club Member

Registered: 11/13/08
Posts: 5355
Loc: Bradford County, PA
With mis-matched bass strings needling the hammer can help. (If they are mis-matched and the problem isn't actually hammer to string mating.) The upper partials aren't as noticable then.
Jeff Deutschle
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#639747 - 01/30/09 07:09 PM Re: unison tuning
kordichb1 Offline
Junior Member

Registered: 01/21/08
Posts: 13
The piano that gives me the most trouble is a 1980s young chang, all original. I will check the hammers. I have to do regulation soon on it.
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#639748 - 01/30/09 07:47 PM Re: unison tuning
Jon Farah Offline
Junior Member

Registered: 01/29/09
Posts: 16
Loc: Sioux Falls, SD
Our recent tuning class was on inharmonicity and we were talking about the very things Gene and Unright are referring to. Really fascinating stuff.
Jonathan Farah, RPT

Chicago School for Piano Technology Graduate


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