Touchweight and Action Modification
time
place
type
speaker
language
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.



