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Touchweight and Action Modification

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April 24, 2026, 4:30–6:00 p.m.
August Förster Piano Manufactory (Budapest)
Seminar
Frans Pietjouw, Wim Feldhaus
German, English

When optimizing the playing characteristics of a piano, various parameters are available to specifically influence the feel and control. This seminar covers the following topics, among others:

• Weighing the hammer heads and calibrating them to a defined target weight.

• Adjusting the leverage ratio, for example, using OBW (Overhead Weight).

• Adjusting and calibrating the key weight.

• Special software has been developed for practical implementation, clearly outlining the procedures and steps.

More information can be found at https://ptdae.nl/de/


Weighing the hammer heads and calibrating them to a defined target weight.

• Adjusting and calibrating the key weight.

impressions

impressions

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