Development of piano player (2nd report, study on repetition of same key based on analysis of behavior of piano-action)

摘要

The repetition of the same key is important when playing the piano, especially since the fast repetition of the same key is difficult even for pianists. In this work, to determine the optimal input waveform for the repetition of the same key of a piano player, the authors first has studied the behavior of the piano-action before and after the string-striking of the hammer. The movement of the piano-action when the swing stroke is performed from the position that leaves the key down than its initial position has been measured, and analyzed using the dynamic model of the piano-action which the authors propose. Further, based on the results, the movements of the piano-action have been studied through experiments of repetition and fast repetition of the same key. As a result, the optimal input waveform for the repetition of the same key has been determined, and music which requires fast repetition can be played on the piano player.