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#639743 - 01/29/09 06:42 PM unison tuning  
Joined: Jan 2008
Posts: 13
kordichb1 Offline
Junior Member
kordichb1  Offline
Junior Member

Joined: Jan 2008
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?


new tech
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#639744 - 01/29/09 07:06 PM Re: unison tuning  
Joined: Sep 2004
Posts: 2,018
Gene Nelson Offline
2000 Post Club Member
Gene Nelson  Offline
2000 Post Club Member

Joined: Sep 2004
Posts: 2,018
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.


RPT
PTG Member
#639745 - 01/30/09 01:09 AM Re: unison tuning  
Joined: Dec 2007
Posts: 386
Erus Offline
Full Member
Erus  Offline
Full Member

Joined: Dec 2007
Posts: 386
Mexico
Could grooved flat hammers be considered a significant source of "noise"?

#639746 - 01/30/09 08:15 AM Re: unison tuning  
Joined: Nov 2008
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UnrightTooner Offline
5000 Post Club Member
UnrightTooner  Offline
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Joined: Nov 2008
Posts: 5,734
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
Part-Time Tuner
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#639747 - 01/30/09 08:09 PM Re: unison tuning  
Joined: Jan 2008
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kordichb1 Offline
Junior Member
kordichb1  Offline
Junior Member

Joined: Jan 2008
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.


new tech
#639748 - 01/30/09 08:47 PM Re: unison tuning  
Joined: Jan 2009
Posts: 16
Jon Farah Offline
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Jon Farah  Offline
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Joined: Jan 2009
Posts: 16
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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