A method of handling resonance effects on disc drives includes the steps of monitoring a position error signal for an actuator arm of a disc drive, generating a feedforward compensation signal from the PES using a bandpass filter, and applying the compensation signal to a servo control signal. The body zone is provided between the source zone and the drain zone. Once these properties are determined, the accurate stereoscopic rendering of the semitransparent object in front of the background allows the two dimensional image to be converted to three dimensions. A torque introduced via the drive shaft can be applied on the first or the second output shaft according to a control of a shift unit for actuating the lock or the multiplication step. The plurality of buffers store the events correlated with the input and output data if the determining unit determines to record the events.