On a magnetic recording medium, M sets of burst patterns are formed along a direction of rotation of a substrate in each burst pattern region, where M is a natural number of two or higher. The support is made of a deposited material that has a lower quality than that of one or both of the intermediate and useful layers. Each driving circuit has two operation modes: an increasing operation mode of applying a predetermined potential difference to the corresponding coil of the set to increase the current passing through the corresponding coil, and a sustaining operation mode of directly connecting the corresponding coil of the set to the discharge path to sustain the current passing through the corresponding coil. The redistribution of stimulus amplitudes utilizes re-normalization of amplitudes so that the perceptual level remains fairly constant. The financial portfolio account is reconciled with the financial data.