FIELD: information storage devices. SUBSTANCE: digital information stored to track of tape magnetic carrier can be read when carrier is transported in some direction. Transportation direction when information is written can be same as direction when is read or be reverse. Depending on this fact first or second equalizing filters are used during reading. To achieve this goal tape or cassette is supplied with marks. These marks provide possibility to detect whether tape side that is played now was recorded in same direction as it is played in reverse one. EFFECT: increased functional capabilities. 13 cl, 6 dwg
