Magnetic recording/reproducing apparatus

A magnetic recording/reproducing apparatus for recording and/or reproducing information in and/or from a magnetic tape with a magnetic head, said magnetic recording/reproducing apparatus comprising:

• speed detecting means for a travelling magnetic tape;
• reel driving means for a take-up reel;
• and
• control means for controlling the rotational speed of said reel driving means for said take-up reel, on the basis of speed information obtained by said tape speed detecting means,
• said control means controlling the rotational speed of said reel driving means for said take-up reel, on the basis of said speed information obtained by said magnetic tape speed detecting means, thereby controlling the travelling speed of said magnetic tape,
• means for maintaining the frequency of resonance, appearing due to total equivalent inertia moment related to said magnetic tape and said take-up reel and that related to a supply reel, higher than the frequency of antiresonance appearing due to total equivalent inertia moment related to said magnetic tape and said supply reel between a start and an end of an operation for winding said magnetic tape on said take-up reel in recording/reproduction.