Patent ID: 7947887

Claim:
A touch control apparatus of an electronic musical instrument, the touch control apparatus comprising: a performance operator which is provided on the electronic musical instrument, supported such that the performance operator pivots about a fulcrum, and manipulated by a player so that the performance operator pivots in a certain direction; a drive means which is provided for the performance operator and generates a reaction force urging the performance operator in a direction opposite to the certain direction; a first physical quantity signal output means which measures a first physical quantity related to a state in which the performance operator is manipulated, and outputs a first physical quantity signal indicative of the first physical quantity; a second physical quantity signal output means which outputs a second physical quantity signal indicative of a second physical quantity related to a state in which the performance operator is manipulated; a first control means which controls the drive means so that the reaction force increases with increase in the first physical quantity signal during an initial period from start of manipulation of the performance operator until predetermined time has elapsed or until a manipulation stroke of the performance operator has reached a predetermined point of the stroke; and a second control means which makes the drive means generate the reaction force in accordance with the second physical quantity signal after a lapse of the initial period, wherein the first physical quantity signal is a signal indicative of a differential value of acceleration of the performance operator, wherein the first physical quantity signal output means is a differential acceleration sensor which measures differential value of acceleration of the performance operator, and wherein the second physical quantity signal is a signal indicative of any one of position, velocity and acceleration of the performance operator.