PURPOSE: To eliminate the need of an FG provided as a means for detecting the number of revolutions of a drum motor at the time of reproducing operation and to obtain an inexpensive reproducing only device, etc.

CONSTITUTION: A reproducing output from a magnetic head H provided on a rotary drum 2 is inputted to a PLL circuit 20 to obtain a PLL output S4 of a prescribed frequency. In a speed servo circuit 15, the number of revolutions of the drum motor is controlled based on the PLL output S4 and a comparison signal Sr.