[pianotech] ETD stretch vs pure (octaves)

[Porritt, David]

Do these OTS numbers correspond to any partial scheme (i.e. 4:2, 6:3 etc.) or are they just numbers like on a volume control?

dp


David M. Porritt, RPT
dporritt at smu.edu<mailto:dporritt at smu.edu>

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Rob Mitchell
Sent: Friday, November 13, 2009 3:49 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] ETD stretch vs pure (octaves)

This has long been a point of confusion for me.  Smaller pianos typically have higher inharmonicity, requiring more stretch in the octaves in an attempt to match the higher partials.  And yet on RCT, the higher OTS (Octave Tuning Styles) are recommended for bigger pianos.  We had Karl Lieberman out a couple of weeks ago and I think he recommended using OTS 7 or 8 on Steinway D's.

I'm assuming OTS 8 has more stretch in the octaves than say OTS 4.  Do I have this backwards or am I missing something else?

Rob

Mitchell Piano Service
(415) 994-1030
www.mitchellpianoservice.com<http://www.mitchellpianoservice.com/>

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Paul T Williams
Sent: Friday, November 13, 2009 12:36 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] ETD stretch vs pure (octaves)

For the most part, the smaller the piano, the more I stretch.  All you all in that sort of mind set?  there comes a point where too much of a good thing hurts the whole project!  I still stretch the Steinway D a tiny bit, more it sounds better to keep it a bit more pure.. My stretches are not very huge in the D, but my ear tells me to still stretch the octaves a bit around the killer octave on up, but again...not too much.

just my 3cent stretch to c-8

Paul
From:

Richard Brekne <ricb at pianostemmer.no>

To:

pianotech at ptg.org

Date:

11/13/2009 01:59 PM

Subject:

Re: [pianotech] ETD stretch vs pure (octaves)


________________________________

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091113/79cbb425/attachment.htm>