Keyboard musical instrument equipped with hammer sensors changing position between recording mode and silent mode

Abstract

A keyboard musical instrument has an acoustic piano for generating acoustic sound in an acoustic sound mode, an electronic sound generating system for generating electronic sounds on the basis of detecting signals of hammer sensors in an electronic sound mode and a stopper operative to prevent strings from hammers in the electronic sound mode, and a change-over mechanism changes the hammer sensors between a closed position and a spaced position so that the electronic sound generating system exactly determines the intensities of the electronic sounds.