Welcome to the Piano World Piano Forums
Over 2 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

SEARCH
the Forums & Piano World

This custom search works much better than the built in one and allows searching older posts.
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
(ad) Pearl River
Pearl River Pianos
(ad) Pianoteq
(ad) P B Guide
Acoustic & Digital Piano Guide
PianoSupplies.com (150)
Piano Accessories Music Related Gifts Piano Tuning Equipment Piano Moving Equipment
We now offer Gift Certificates in our online store!
(ad) Estonia Piano
Estonia Piano
Quick Links to Useful Stuff
Our Classified Ads
Find Piano Professionals-

*Piano Dealers - Piano Stores
*Piano Tuners
*Piano Teachers
*Piano Movers
*Piano Restorations
*Piano Manufacturers
*Organs

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano Accessories
* Buying a Piano
*Buying A Acoustic Piano
*Buying a Digital Piano
*Pianos for Sale
*Sell Your Piano
*How Old is My Piano?
*Piano Books
*Piano Art, Pictures, & Posters
*Directory/Site Map
*Contest
*Links
*Virtual Piano
*Music Word Search
*Piano Screen Saver
*Piano Videos
*Virtual Piano Chords
Topic Options
#1811684 - 12/24/11 08:32 AM Why overpull?
Weiyan Offline
500 Post Club Member

Registered: 10/04/11
Posts: 769
Loc: Hong Kong
In veritune, there is over pull option.

I am confused it with stretch octaves.

My understanding of stretch octaves is compensation of inharmonics due to stiffness of string.

Is over pull doing something more than compensating inharmonics?

Thanks.
_________________________
Fake Book player
Ragtime beginner
http://weiyanwo.wordpress.com

Top
(ad PTG 568) Grand Action Regulation in 37 Steps
Grand Action Regulation in 37 Steps
#1811715 - 12/24/11 09:36 AM Re: Why overpull? [Re: Weiyan]
Emmery Online   content
2000 Post Club Member

Registered: 04/02/08
Posts: 2443
Loc: Niagara Region, On. Canada
Various amounts of overpull are applied to areas of the piano to compensate for the loading of pressure on the sound board as you tune. It applies to pitch raises rather than fine tuning (which follows afterwards). Most of the ETD's require tuning from the bass upwards to the treble in systamatic order including unisons for the overpull/pitch raise function to work properly. On very old pianos with huge pitch raises, it is wise to inspect the condition of the sound board and the bridge before undertaking any large overpull amounts. In RCT, the overpulls will also add an additional 1 1/2 cent amount to the pitch raise. This is to compensate for an anticipated drop of this amount as the piano settles in the next couple weeks.
_________________________
Piano Technician
George Brown College /85
Niagara Region

Top
#1811725 - 12/24/11 09:54 AM Re: Why overpull? [Re: Weiyan]
Weiyan Offline
500 Post Club Member

Registered: 10/04/11
Posts: 769
Loc: Hong Kong
Thank you, Emmery.

Overpull is just for the pitch raising process, has no effect on the tuning curve. Is my understanding correct?

Thank you.
_________________________
Fake Book player
Ragtime beginner
http://weiyanwo.wordpress.com

Top
#1811751 - 12/24/11 10:58 AM Re: Why overpull? [Re: Weiyan]
Emmery Online   content
2000 Post Club Member

Registered: 04/02/08
Posts: 2443
Loc: Niagara Region, On. Canada
The tuning curve is applied on the final fine tuning. The overpull (maximum) percentages are based on general response from pianos that have been tested by the folks who program the machine. The machine then determines the specific amounts of overpull apllied based on the past notes you havee been tuning. Sometimes I reduce the maximum percentage amounts (default)they program in the machine. If the piano has a weak structure, is very old, has rusty strings ect...I will reduce the overpull percentage. I will often do this on the area of the wound strings also to avoid breakage, especially if I have seen some of them changed out in the past.

As one gets familiar with the results of overpulls on different types of pianos, you begin to make small adjustments on the maximum settings to get better results. Because these are pitch raises, I pick a template of a past piano that resembles the one I'm working on in size. The tuning curve of that template will be close enough for the pitch raise. Before the final tuning, I will properly sample the piano and choose the stretch I want in the program.

As an additional assurance that the correct stretch is chosen, an aural tuner can set a series of (octave)sample notes by ear, sample them, and compare to the cents readings of the fine tuning template. I'm not sure if Verituner can do this but RCT can.
_________________________
Piano Technician
George Brown College /85
Niagara Region

Top
#1811847 - 12/24/11 01:47 PM Re: Why overpull? [Re: Weiyan]
daniokeeper Offline
1000 Post Club Member

Registered: 02/01/09
Posts: 1088
Loc: PA
AFAIK, the Verituner doesn't do averaging of overpull for a series of notes, just the overpull for the note currently being tuned.
_________________________
Joe Gumbosky
Piano Tuning & Repair
www.tinyurl.com/tunerjoe
(semi-retired)

Top

Moderator:  Piano World 
What's Hot!!
8 Live Ragtime Piano Players on the Cape!
-------------------
HOW TO POST PICTURES on the Piano Forums
-------------------
Sharing is Caring!
About the Buttons
-------------------
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
Ad (Seiler/Knabe)
Knabe Pianos
Sheet Music
(PW is an affiliate)
Sheet Music Plus Featured Sale
(ad) HAILUN Pianos
Hailun Pianos - Click for More
(ad) Lindeblad Piano
Lindeblad Piano Restoration
New Topics - Multiple Forums
YAMAHA U1E polished mahogany
by CYBERSPRITE
10/23/14 05:13 PM
What did you play tonight?
by Johan B
10/23/14 05:10 PM
Novice in love with Kawai and seeking advice!
by Ellisande
10/23/14 05:03 PM
SF Symphony pianist at Steingraeber recital / reception
by master88er
10/23/14 03:31 PM
Ferdinand "???" Piano from Vienna?
by TheloniousPunk
10/23/14 02:20 PM
Who's Online
147 registered (accordeur, alfredo capurso, ajames, 30 invisible), 1618 Guests and 13 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
76631 Members
42 Forums
158446 Topics
2326881 Posts

Max Online: 15252 @ 03/21/10 11:39 PM
(ads by Google)

Visit our online store for gifts for music lovers

 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
|
Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World | Donate | Link to Us | Classifieds |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | Press Room |


copyright 1997 - 2014 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission