I have a Danemann upright piano which I have always been happy with but as my piano skills have improved I’ve noticed that sometimes the hammers bounce on the string hitting it twice. Can this be repaired by regulating the action?
It is quite likely that the action or keys need regulating which ensures that each note is working efficiently and evenly throughout the compass of the piano. With use, the fine measurements and tolerances set up between the various parts of the action change and must be reset. There is, however, the possibility that it is your technique in playing the piano that could be causing this particular problem with ‘bubbling’ hammers. It is sometimes possible on an upright to deliberately make the hammer bounce on the string by playing the key very softly and not depressing it to the full extent of the key depth. By merely skipping over the keys rather than playing them fully, you are not allowing the key to set in motion all the aspects of the action which lead to the successful playing of the note. The piano action is a highly developed extension of your fingers and must be allowed to perform properly. Regular maintenance and good technique will allow this to happen.