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!

Gifts and supplies for the musician

SEARCH
the Forums & Piano World

Trying Something New with Search
(ad)
Pearl River
Pearl River Pianos
(ad) Pianoteq
(ad) Lindeblad Piano
Lindeblad Piano Restoration
(ad) P B Guide
Acoustic & Digital Piano Guide
Who's Online
98 registered (Ahmedn1, AndrewJCW, anamnesis, accordeur, AprilE, 24 invisible), 1118 Guests and 7 Spiders online.
Key: Admin, Global Mod, Mod
(ad) Estonia Piano
Estonia Pianos
Quick Links to Useful Piano & Music Resources
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 & Music Accessories
*Live Piano Venues
*Music School Listings
* 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: 812
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.
_________________________
Working on:\

J.S.Bach Prelude in C Min: No. 2 from Six Preludes fur Anfanger auf dem
Am Abend No. 2 from Stimmungsbilder, Op. 88
60s Swing No. 1 from Swinging Rhythms
http://weiyanwo.wordpress.com

Top
(ad)
Piano & Music Accessories
piano accessories music gifts tuning and moving equipment
#1811715 - 12/24/11 09:36 AM Re: Why overpull? [Re: Weiyan]
Emmery Offline
2000 Post Club Member

Registered: 04/02/08
Posts: 2481
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: 812
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.
_________________________
Working on:\

J.S.Bach Prelude in C Min: No. 2 from Six Preludes fur Anfanger auf dem
Am Abend No. 2 from Stimmungsbilder, Op. 88
60s Swing No. 1 from Swinging Rhythms
http://weiyanwo.wordpress.com

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

Registered: 04/02/08
Posts: 2481
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
(ad 568) PTG Convention Norfolk
PTG Convention Norfolk
#1811847 - 12/24/11 01:47 PM Re: Why overpull? [Re: Weiyan]
daniokeeper Offline
1000 Post Club Member

Registered: 02/01/09
Posts: 1202
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!!
Why It's Impossible to Tune a Piano!
aka, why you should be nice to your tuner.
--------------------
Posting Pictures on the Forums
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

-------------------
Piano Classified Ads
Piano Acc. & Gift Items in
Piano World's Online Store
In PianoSupplies.com ,(a division of Piano World) our online store for piano and music gifts and accessories, party goods, tuning equipment, piano moving equipment, benches, lamps Caster Cups and more.


Free Shipping on Jansen Artist Piano Benches
(ad)
Hammond A100 for Sale!
PRICE DROPPED!
(Think B3)
Hammond A100 for sale!
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
(ad 125)
Sweetwater $55,000 Giveaway
Sweetwater $55,000 Mic Locker Giveaway
(ads)
PD - WNG - MH
Wessell Nickel & Gross
New Topics - Multiple Forums
MESSIAEN - Theme and variations
by PatrickCaldwell
05/24/16 09:51 PM
Fair value for 1984 Yamaha G-2 Satin finish?
by newbie78
05/24/16 09:37 PM
Upright piano sustain pedal doesn't work on some keys
by Ahmedn1
05/24/16 09:31 PM
Advice on buying a small grand and concerns about Perzina
by Pneuma
05/24/16 05:10 PM
Battle Hymn of the Republic
by FrankCox
05/24/16 02:29 PM
Forum Stats
83,748 Registered Members
44 Forums
172,907 Topics
2,527,463 Posts

Most users ever online: 15,252 @ 03/21/10 11:39 PM
Sheet Music Plus (125)
Sheet Music Plus Featured Sale

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 - 2016 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission