Patent ID: 8653353

Claim:
An electronic keyboard musical instrument, comprising: a key to be depressed and released; a mass body provided for the key and configured to be driven by a depressing operation of the key so as to pivotally move in a movement region between a rest position and an end position; a back check portion configured to back check the mass body which moves from the end position to the rest position; a position detecting portion configured to detect a position of the mass body; and a controller configured to generate a musical tone in accordance with the depression operation of the key and configured to control silencing of the musical tone on the basis of the position of the mass body detected by the position detecting portion, such that the musical tone that is being generated for the key which corresponds to the mass body is silenced when the mass body reaches a preset tone silencing position in a movement of the mass body from the end position to the rest position, wherein the controller is configured to change the tone silencing position on the basis of a time required for the mass body to pass through a first sub region of the movement region and a time required for the mass body to pass through a second sub region of the movement region in the movement of the mass body from the end position to the rest position, the second sub region being located nearer to the rest position than the first sub region.